TRACTUELLEdition No. 15 • September 2004

Newsletter from TRACTO-TECHNIK

HDD systems

Cover photo story: Installation of lake retrieval pipe throughLake ConstancePages 18 - 19

Soil displacement

Vertical application of Grundomat makes piling easy onPages 4 -5

New techniqueShort pipe reliningaccording to the TIP technique withGrundoburstPages 16 - 18

TRACTUELL 14/E2

Contents

3 Soil displacement:Service line installation ‘through the keyhole’

4- 6 Soil displacemen:Piling made easy with GRUNDOMAT

7- 8 Soil displacemen:Contractor Kelbore installs record crossing under highway

8- 9 Pipe ramming:Powers lake construction: Large diameter pipe ram in Illinois

10- 11 Pipe ramming:Pipe ramming under prestigious building in India

12- 13 Pipe bursting: Renewal of 3 km concrete sewer pipe through woodland

14 Pipe bursting: GRUNDOBURST 1250G replaces concrete pipe ND 400

15 Pipe bursting: Pipe renewal with GRUNDOBURST 2500G

16- 17 New technique: Tight-In-Pipe short pipe relining with Grundoburst

18- 19 HDD systems: Lake Constance: spectacular installation of a lake retrieval pipe

20 HDD systemsInstallation of rainwater sewer pipe through rock

21 HDD systems: Plowing method and HDD: installation of drinking water line through mud-flats in the North Sea

22- 23 HDD systems: 450 m horizontal bore under airfield with Grundodrill

24- 25 Novelty: New all-wheather protection for Grundodrill X series

26- 27 Information: BAUMA 2004 review

28 Information: Nodig-construction establishes partnership with the ISTT

© Copyright by:TRACTO-TECHNIK GmbHSpezialmaschinenD-57356 Lennestadt

Contents:Carola Schmidt

Setting and Layout:Anne Knour

Printed by:Druckerei Hachenburgon recycable paper

Circulation:10.000 copies

Impress

TRACTUELL 14/E 3

S O I L D I S P L AC E M E N T

GRUNDOMAT:Perfect service line installation‘through the keyhole’

MichCon Gas is one of theUSA’s largest and oldestproviders of natural gas,

having served the city of Detroitand surrounding areas for over 150years. Currently the utility sup-plies natural gas to approximately1.3 million families and businessesin over 500 communities through-out Michigan. They maintain over30.000 km of natural gas pipelineand have the ability to store 130billion cubic feet of natural gas.

Service installations keep MichConGas crews particularly busy. Withover 150 service installations permonth (either new service, upgra-de or rehab/replacement) howmaintenance crews approach themcan have a significant effect ontime and money. Arioli says thecompany has looked at many diffe-rent construction techniques for fa-cilitating these installations.

While new service or rehab/repla-cement installation is common,Arioli has seen a consumer de-mand trend in his area that beganafter the blackout in the summer of2003. Since that event, customershave been requesting larger servi-ces to accommodate gas-poweredgenerators in the event of anotherelectrical power loss. The gas-po-

wered generators require a 28 mmservice to operate, much largerthan the area’s 12 - 20 mm stan-dard services.

As the name implies, keyhole in-stallations utilize small excavati-ons. While each installation is dif-ferent, 15 m is the average length.Crews begin by excavating a smallhole in the road above the main.Meanwhile at the house, anotherminimal excavation is performedto allow the launch of the piercingtool. According Arioli the launchpit is typically 100 mm wide, 650mm long and 350 mm deep. Fromthere the piercing tool is launchedto the 450 mm diameter core(keyhole) in the street. Crews posi-tion the piercing tool using a teles-copic Grundoscope aiming frameand surveyor stake before laun-ching in order to ensure that thetool starts out on the proper lineand grade. Still, working with suchsmall targets, the precision and accuracy of the piercing tool is anabsolute must.

MichCon crews use 45 mm and55mm piercing tools for keyholeoperations. Once the tool arrives atthe 450 mm diameter core in the sidewalk, street or roadway, crewsattach the new Medium DensityPolyethylene (MDPE) service tothe front of the piercing tool. Be-cause the diameter of the keyholeis so small, the tool cannot be re-moved through it. Instead, the newpipe is attached to the front of thetool and the tool is placed in rever-se and backed out to the launchpit. As the tool is backing out itpulls the MDPE in place.

MichCon dedicates three crews tofulltime keyhole installations.Crews are typically able to finishtwo or three installations per day.

The Grundomat’s reciprocating stepped conechisel head moves independently from the maincasing, powering through obstacles and creatinga pilot bore for the main tool body to follow.This design ensures the tool’s accuracy.

The extremely accurate Grundomat makes thekeyhole process possible. Crews shoot the toolfrom the house to an 450 mm diameter hole,usually in the street at distances averaging 15 m

MichCon performs over 150 service line/keyholeoperations a month. The company dedicatesthree crews for fulltime service line installations.

Customer:MichCon Gas, Detroit, USA

Machine/equipment: Grundomat 45 and 55

Special features:Use of a special “keyhole” tech-nique which limits disruption andsaves costs for the installation ofservice lines

Keyhole Ø:450 mm

Launch pits (L x W X H):650 x 100 x 350

TRACTUELL 14/E4

TT UK recently received a telepho-ne call from Tube Lines Ltd - thecompany responsible for moderni-sing and maintaining the Jubilee,Northern and Piccadilly Lines inLondon/England.

On one particular section of a Nor-thern Line embankment, just southof Mill Hill East Station, there is aproblem with ground movementon the embankment. The line itselfwas constructed in the early 1900sand the ground is a mixture of clayand ash. Remedial works weredeemed necessary to minimise therisk of the embankment slipping.

Mott MacDonald, the consultantsfor the above project, approachedTube Lines to drive 14 no 114mmdiameter steel mini piles to allowthem to carry out various loadtests.

Tube Lines then contacted TT UKto ascertain whether they couldprovide the special equipment todrive these mini piles.

After a site meeting between MottMacDonald, Tube Lines and TTUK staff, it was decided that a95mm GRUNDOMAT would beideally suited for the job.

Mott MacDonald then producedthe specification to which the pileshad to be driven. This varied fromanything between 2.0 to 4 Metresin depth. Seven of the piles weredriven vertically and seven at a 45degree angle. The 114mm pileseach had 300mm of fill material atthe base of the pile as they weredesigned to support concretebeams which will retain the em-bankment.

TT UKs engineers positioned the95mm GRUNDOMAT into the114mm pile. The pile was placedin the vertical position and withthe air supply turned on theGRUNDOMAT then locked itselfinto the plug material and started

Piling made easy with GRUNDOMAT

Customer: Tube Lines LtdPlace: Mill Hill East Station, London UKMachine: Grundomat 95 mmJob: Installation of 14 mini sheet pilesØ of sheet piles: 114 mmlength of sheet piles: 3 to 5 m eachInstallation depth 2,0 to 4,0 mSpecial features: 7 of the piles were driven vertically and

7 at a 45º angle.The piles each had 300mm of fill material

Duration: approx. 17 minutes per pile

The Operators ensuring the pile is driven plumb by using a spirit level

TRACTUELL 14/E 5

S O I L D I S P L AC E M E N T

to drive the pile down into the em-bankment. On average it was ta-king 17 minutes to drive a 3 – 5Metre pile including the weldingtime. The piles were driven to ap-proximately 1 Metre centres.

On reaching the required depth theGRUNDOMAT was put into rever-se by simply turning the airline aquarter turn to the left. Once themachine had broken away fromthe plug material at the base of thepile it was simply lifted out.

As can be seen by the photographthe pile were then filled with con-crete in readiness for the verti-cal/lateral and tension capacitytests which were to be conductedby a specialist company.

The jobsite sketch shows the embankment and the position of the 14 mini sheet piles tobe installed (top view).

Reinforced concrete piles now firmly in place

GRUNDOMAT being removed from thepile

TRACTUELL 14/E6

Contractor Kelboremakes GRUNDOMAT

historyrom early February 2004 to mid

March 2004 Kelbore Horizontal Bo-ring of Port Elizabeth Republic ofSouth Africa, specialists in UnderRoad Horizontal Boring achieved anumber of world firsts in theirfield of speciality.

Kelbore successfully installed 9UPVC and HDPE service ductsaccross the National Route 2, (Sec-tion 11), a dual carriage two lanehighway adjacent to the Coega De-velopment Project approximately30km east of Port Elizabeth. Theseunder road crossings were donewith Kelbore’s Grundomat 180 PSeries thrust boring machines. Thiswas from the installation of 5 x160mm and 4 x 110 mm ducts toaccommodate communication andelectrical services for the future de-velopment.

The uniqueness of these crossingsand installations is in the distancesover which they were successfullydone.

According to information at handthe longest distance over which theGrundomat technology has beenused in Europe and the UnitedKingdom is 35 m. The ducts on theCoega Project were successfully in-stalled over distances varying bet-ween 50 mand 71 m!!The points of entry into the em-bankment were ±3m below theroad surface. The point of exit werealso ±3m below road surface. Thehorizontal spacing between the110mm ducts at point of entry was300mm. On exit the spacing was400mm after a run of 71 m. The ho-rizontal spacing between the160mm ducts was 1,2m at thepoints of the entry and ±500mm atthe points of exit after runs varyingbetween 50 metres and 70 metres.The enclosed photographs visuallyconfirm the results achieved.

Finally, the ducts were installedinto fills compacted to 93 Mod.AASHTO density, pavement layerscompacted to 95% Mod. AASHTO

F

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S O I L D I S P L AC E M E N T

Customer:Kelbore Construction, South Africa

Place:Port elizabeth, SA

Machine: Grundomat 108 P

Job:Undercrossing of 4-lane highway National Route 2

Pipe:

Installation length:

Installation time: February - March 2004

density as well as into insitu mate-rial. The insitu material consistedof calcrete and sand stone andwere classified as intermediate ma-terial in terms of the Standard Spe-cifications for Roads and BridgeWorks for State Road Authorities.(Colto)

The average time spent per runwas 18 hours.

Exit of the 180mm crossing at ±3.2m below road level:

Entry of the crossing.

TRACTUELL 14/E8

Large diameter pipe ram in Illinois:

Powers Lake Construction

powers through

The world’s largest rammer GRUNDORAM Apollo. .

Skill, attention to detail, solid pre-paration and confidence are a fewcharacteristics of any successfulcontractor. Powers Lake Construc-tion Co. Inc., Twin Lakes, WI., em-bodies these important qualitiesand more. According to AaronKarow, Powers Lake ConstructionProject Manager, everything all re-lates back to the goals of the com-pany. He said, "We are always try-ing to improve. Our goal is to beco-me a full service company. We real-ly want to get to the point where,not only can we do a little bit ofeverything, we excel at everythingwe do.” It is that dedication thatproved invaluable on a recent ram-ming project.

The project was completed forMeyer Materials, an aggregatecompany located in McHenry, Ill.The company was looking to ex-pand its gravel operation. To facili-tate the expansion a conveyor sy-stem needed to be installed bet-ween the new gravel pit and thecrushing equipment. The companyfaced one major obstacle to the ex-pansion, the crushing equipmentwas located on one side of StateHighway 120 and the new pit wason the other.

The solution to the problem was toinstall a casing underneath the hig-hway that would allow for the con-veyor system to travel from oneside of the road to the other with-out inhibiting traffic. The projectwas specified as pipe ramming andPowers Lake chose the a 60 mmdiameter Grundoram Taurus forthe job. Powers Lake crews set to

Customer: Meyer Materials, ILL, USA

Contractor: Powers Lake Constructio, twin Lakes; WI

Machine: Grundram TAURUS and APOLLO

Job: Installation of steel pipe OD 2000 mm as a conveyer for between gravel pit and crushing equipment for the expansion of a gravel operation

Installation length: 45 m

Pipe: Steel OD 2000 mm in 3 sections of 15 m each

Ø of ram cones: 800 mm nd 600 mm

6

TRACTUELL 14/E 9

P I P E R A M M I N G

Powers Lake Construction prides itself onquality work and attention to detail. HerePowers Lake Construction President MarkKarow (left) and Project Manager NoelKarow pose next to the world’s largestpipe rammer.

work preparing the jobsite for thelarge diameter casing by fabricatinga rail system to facilitate the ram-ming. The rail system consisted of a200 mm wide I-beam set in concretewith cross beams every 5 m. Theconfiguration was positioned at a1.5% downhill grade. Grade wascritical to avoiding a high-pressuregas main 9 m into the ram.

The pipe arrived on the jobsite inthree sections. Each piece of the2000 mm O.D. steel casing weighedin excess of 20 tons. Using a 70-tonmobile crane crews moved the pipesections into position on the rail sy-stem. Welding the sections took ap-proximately one day per joint. Afterthe sections were welded together,a cutting shoe was welded on thelead casing. Two 1/2-inch bentonitelines were added along the top ofthe casing.

Next, crews used the crane to placethe Taurus ramming tool in positi-on and made the connection bet-ween the tool and the casing. A se-ries of ram cones were used to ac-complish this. An 2000 mm diame-ter ram cone reduced the overalldiameter from 2000 mm to 800 mm.A second ram further reduced theoverall diameter from 800 mm to600 mm to make the connection

with the tool. Two Ingersol Rand1300 CFM compressors were conne-cted to the tool and ramming wasready to begin.

At a total weight of 58.500 kg, ram-ming the 45 m of 2080 mm casingwas no easy task, even for the for-mer world’s largest pipe ramming.At the 28 m mark the Taurus wasremoved and sent on to anotherjobsite. Schwager then brought inthe reigning world’s largest piperammer, the Grundoram Apollo.The 800 mm diameter tool has a 900mm rear flair and measures4400mm in length. It weighs 11.500 kgand delivers over 40 tons of impactenergy at 180 strokes per minute.

The Powers Lake crew removed theTaurus and removed some of thespoil from the installed casing befo-re moving the Apollo into position.Once all the connections were madewith the new tool, ramming wasunderway. Within two and a halfhours the remaining 18 m of the ca-sing was installed on grade. Karow said, "I believe everyonewas really impressed with the pro-ject. It was a big ram. Meyer Materi-als was very happy to have the ca-sing installed on line and grade andwe were pleased to be able to suc-cessfully complete the project.”

Once in place, the casing ND 2000 would facilitate the expansion of a gravel operation.A conveyor system will be placed through casing to carry gravel from a new pit on oneside of the highway to the crushing facility on the other.

Two pipe rammers were used on the pro-ject. The Grundoram Taurus started theproject then moved to another jobsite.The Grundoram Apollo was brought in tofinish the job.

TRACTUELL 14/E10

Bangalore is the capital of Karnataka,located in South India. It has 4.3 mil-lion inhabitants, or 5.7 million inclu-ding its suburbs. Bangalore is calledthe "Silicon Valley of India” due tothe large number of computer andtechnology companies, as well as therelated infrastructure, located there.

Vidhana Soudha, built almost entire-ly of dressed Bangalore granite, is atribute to Temple architecture. Hou-sing the Legislative Chambers of thestate government, this 46 meter highseat of the government is Bangalore'sbest known landmark. It is one ofBangalore's most important buil-dings and was designed by KengalHanumanthaiah, who intended it to"Reflect the Power and Dignity of thePeople”. It was constructed in 1956entirely along Indian style of archi-tecture. There are four domes on allthe four corners. The main entranceis overshadowed by the four headedlion, the symbol of Indian sovereign-ty. It houses 22 departments and 300rooms.

The Public works department Karna-taka in Bangalore was constructingthe south block of Vidhana Soudha.The above block had to be connectedto Cubbon Park by installing twosteel pipes ND 900m for a stormwater drain line and a steel pipeND600mm steel for a sewerage line.Thepaipes had to be laid together for alength of 40 Mtrs. Each.

Vidhana Soudha is situated in theheart of city with busy roads andconstant VIP movement. PWD andits main contractor Shrike construc-tion (P) Ltd had no possibility ofusing open cut method only to laysthese lines. Since this process wouldtake a minimum of 2-3 months inclu-ding reinstatement and the trafficcould not be diverted for this longperiod. They turned to KRITAENGG.(P).LTD to provide a trench-less solution.

Survey:• A preliminary physical survey ofthe area was carried to determinethe physical obstruction like trees,electric posts, roadside Berms etc.

• A GPR survey was carried out todetermine the under ground utili-ties like HT Power cables, Tele-communication lines water &sewer pipes.

• Geo tech consideration :- The soilstrata are hard Muram generallyfound in most parts of Bangalorewith chunks of rock & boulders.

Site organisationThe pipe had to be laid at 1m apart.The depth required was to be 4 mtrs.and the gradient had to be within200 mm, i.e. 5 mm per meter.

EquipomentThe equipment to be used had to bea powerful machine, which could in-sert Ø 900 mm pipes to a length of 40m. Also it was important to avoid

Pipe ramming underprestigious building in Bangalore/India

Customer: Shrike construction (P) Ltd

Contractor: Krita Engineering Ltd.

Place: City of bangalore, India

Machine: Grundram KOLOSS

Job: Installation of three steel pipes for a storm water drain line an one steel pipe for a sewage line as connection of block of the legislative building “Vidhana Soudha” to a park nearby

Installation length: 40 m each

Installation depth: 40m

Gradient: 200 mm

Pipe: 3 x Steel ND 900 mm 1 x Steel ND 600 mm

Duration: 40 working days

TRACTUELL 14/E 11

any disturbance or change in physi-cal property of road like crack for-mation etc., on the surface due toheavy traffic.

Krita Engg. used the Tracto Technicpipe raming machine KOLOSS forthis job with very high dynamicthrust backed by 750 CFM, ELGIcompressor.

Site preparation• Entry bit of 14 mts length x 9 mtrs.Width was excavated upto depthof 4.5mts. This had to accommo-date all the 4 pipes.

• A concrete retainer wall was con-structed at the face of the pit to sealany collapse while raming.

• All the other 3 sides of the entry pitwas sealed with shuttering sheets& channels.

• Gradient was the most difficultand important aspect of the job,hence concreating was done as afoundation in the pit.

• Pipe Ø 900 mm having 14mm wallthickness were welded with addi-tional stiffness provided at thewelding joints so as to avoid anybreakage of joints while raming.

• Dewatring pumps were installedas a safety precaution.

• The complete area was barricadedwith sheets to avoid any untowardaccidents.

JobsiteAfter all the preparations were com-pleted the job execution had to bestarted, pipe string of 5 mtrs. Lengthwas lowered and strapped with ma-chine. After checking the necessaryangel required to obtain around5mm upward incliation at everymtrs. The rammer was started. Firstpipe was very critcle as it wouldguide the direction of other pipes.First 30 m (6 pipes) took not morethan 2 hrs.each for insertion the com-plete string of 40 m was done in lessthan a weektime. The result obtai-ned was perfectly matching with therequirement. The second pipe waspositioned at roughly 1 m differenceand was completed in the similarfashion Ø 60 0mm pipe of 10mmwall thickness was placed at around3 m depth and was inserted with thesame accuracy. The whole projectwas completed within 40 workingdays including cleaning of pipes.The gradient was within 200 mmlimit.

After completion of the job the PWDdecided to use this technology morefrequently and effectively for thereother projects

P I P E R A M M I N G

TRACTUELL 14/E12

K’Nex Pipelines is a South Walesbased company who specialise in allforms of pipe bursting and trenchless renewal. The company was esta-blished in the 1990’s carrying outwork directly to the utility indu-stries. From early days, K’Nex havestrived to promote the use of trenchless techniques to these industriesand in recent years has been recogni-zed as the leading contractor withinWales for alternative solutions.

In early 2000 the company recogni-zed the need for increased diametersand pipe burst lengths to advancepipe bursting in general. This resul-ted in the purchase of a Grundoburst1000G pipe bursting rig. This rig inbrief, comprises of a pull unit whichis capable of achieving a 100t pullingthrust whilst using a QuickLock rodsystem. This equipment was far inadvance of any of its contemporariesand offered a solution where pre-viously there was none.

This major capital investment allo-wed us to promote our services toDwr Cymru Welsh Water (DCWW)strategic Capital Alliance Partners.

Due to the capabilities of this equip-ment the client recognized that pipebursting had now become a seriousalternative technique for the renewal

of pipes, where often location andenvironmental factors negate the useof traditional open-cut methods.

The Gwendraith capital project con-sisted of approximately 7 kilometresof sewer upsize. Although the exi-sting concrete pipeline was in goodcondition the system could not copewith the flows and had been dischar-ging through the combined sewerout falls (CSO) into the river that runadjacent for a number of years. Theexisting pipeline runs down the val-ley to the treatment works throughheavily ancient woodlands, andareas of special scientific interest.The initial scheme was detailed as anopen cut off line replacement whichwould have had significant effect onboth the local ecology and residentsof the area. From the outset it beca-me evident that traditional open cutmethods were not an option in alarge section of the scheme withoutsignificant environmental impact.

At the feasibility stage, Knex pipeli-nes where approached by the WelshWater capital alliance partners, Mor-rison Construction to investigate thepossibility of trench less replace-

ment. It was our feeling on inspec-tion of the main and the flows wit-hin the existing system that an on-line pipe burst replacement wouldprove both environmentally andcommercially viable.

The design requirements were thatthe existing 9” and 12” sewer wereto be replaced with 450mm and560mm pipe. A presentation wasdrafted detailing the location of pits,method of works and proposed so-lutions which was presented to theEnvironment Agency(EA), Coun-tryside Council for Wales(CCW) andthe local ecological representatives .In addition, it was felt that that aphysical demonstration witnessedby all parties would further demon-

Renewal of concrete sewage line through ancient woodland

with Grundoburst 1000G Aerial photograph showing route throughancient wood land

Part of the scheme passed through a golfcourse, this resulted in understandable an-xiety from club members concerning dama-ge, however the surface and condition of thefairway is still in its original condition.

TRACTUELL 14/E 13

P I P E B U R S T I N G

strate both the capabilities of thecompany and the significant redu-ced effect of the replacement optionon the surrounding area. This de-monstration proved to be the deci-ding factor in the method proposedpulling in over 100mts of butt wel-ded 560mm Diameter new pipe inforty five minutes with no damageor disruption caused.

On the strength of the above K’nexwere awarded the on line replace-ment contract through the more sen-sitive areas of the Gwendraeth Sche-me. This involved th replacement ofapproximately 3km of main with acontract value of approx £750,000.

Due to the environmental con-straints imposed by the adjacent wa-tercourses and the local wildlife ha-bitat the scheme was programmedto be carried out through the wintermonths. Whilst this provided accessconstraints these were minimised bythe bursting option with plant mo-vements and excavation etc kept toan absolute minimum. The advanceinvestigation works, which includeda full 3000m camera survey and flowmonitoring analysis, ensured thatwe had thought through and prepa-red for every eventuality

Unfortunately the contract startedover the winter months and dealingwith existing sewer flows was onlyone of the problems to over come.However all the up front investigati-on and the liaison with the relevantauthorities and affected land ownersand members of the public paid off.

The project became a total successstory and even now after K̀ nex hasgone on to install in excess of 10 ki-lometres of large diameter sewerusing pipe bursting, the story ofGwendraith still seems to be the onethat set pipe bursting on its way inthe Welsh Water Alliance as a se-rious alternative to open cut.

Customer: Welsh Water (DCWW) Caüital alliances, UK

Contractor: K’Nex Pipelines is a South Wales, UK

Place: Gwendraith, Wales, UK

Machine: Grundoburst 100G

Pulling force: 100 tJob: Replacement and upsizing of a concrete sewer

line which could not cope with the flows throughancient woddlands to a treatment plant

Advance investigation: Camera survey and flow monitoring analysis

Bursting length: 3 kilometres

Old pipe: 9” and 12 “

New pipe: Ø 450 mm and Ø 560 mm

Date: April 2003

TRACTUELL 14/E14

P I P E B U R S T I N G

Das verlegte Neurohr.

Customer: Civil engineering office Freudenberg/GermanyContractor: Firma Sommer, DillenburgPlace: Freudenberg/GermanyMachine: Grundoburst 1250 GPulling force: 125 tDamage: Corrosion / misalignment / fragmentationBursting length: 2 x 120 mExpander: 610 mmOld pipe: Concrete ND 400New pipe: PE-HD DN 500 resp. OD 560 x 31,7 (Simona)

Long pipes 12,0 m / butt weldingCoverage: 1,40 m (trees along the pipe path / lake nearby)Rod pushing time: 80 min. Effective pulling time: 90 min. per sectionDate: September 2003

Der zum Einzug vorbereitete Rohrstrangmit Berst- und Aufweitkopf, 610 mm Durchmesser.

Rohrankunft in Zielgrube.

Der GRUNDOBURST wurde inzwischendemontiert. Zu sehen ist der Berst- undAufweitkopf. Gut erkennbar auch das ei-gens betonierte Widerlager mit einem ein-gebauten 600er-Beton-Rohrstück, um denRohreinzug zu erleichtern.

GRUNDOBURST 1250 G replaces concrete pipe ND 400

14

TRACTUELL 14/E 15

Customer: Portland Construction

Machine: GRUNDOBURST 2500 GØ bursting rods: 140 x 150 mmTotal rod length: 120 m

Pipe pathTotal length: 890 mLength of sections: 90 resp. 110 mPipe depth: between 5 and 8 ft

Machine pit: 2,5 x 9 mIntermediate pits: yes

Old pipeType of line: SewageMaterial: ConcreteNominal diameter: 400 mm

New pipeMaterial: PE-HD Nominal diameter: 600 mm

AccessoriesWinch: 10 TonsBentonite tank: 1900 l

Description:The sewage pipeline ran between several houses, most of themhaving open-air swimming pools. The distance from the swimming pools to the pipline was approx. 10 ft.

Pipe renewal with

GRUNDOBURST 2500 G

P I P E B U R S T I N G

TRACTUELL 14/E16

New TIP technique:

Short pipe relining with GRUNDOBURST

By using the new Tight-In-Pipemethod (TIP-method) short sewa-ge pipes can be installed trenchles-sly from manhole to manole tightlyadjacent to the old pipe wall. Asthe outer diameter of the new pipeis only slightly smaller than theinner diameter of the old pipe,there is no necessity for filling theannulus, which is often requiredfor standard relining. The cross-section deficiency is minimal and atrenchless connection of houseconnections is possible.

An essential advantage of theTight-In-Pipe method is the factthat during the installation small tomedium sized offsettings can beevened out. Furthermore the me-thod can be applied when damagesoccur, such as e.g. tears, leakagesor in-growing of roots. In such acase a solid girder, prepared at thefactory, is built into the old pipecanal. Generally speaking, in thisconnection the term relining isused instead of calibre pipe bur-sting. This totally new and innova-tive method of technique from

TRACTO-TECHNIK can be carriedout without any underground con-struction works.

The special winch constructionwith the GRUNDOBURST, as wellas the special proven pipe installa-tion technique ensure a safe instal-lation (patent pending).

The hydraulically operated GRUN-DOBURST 400GT with cable pul-ling device is set up in the targetpit before starting the sanitation,the winch boom is lowered into thepit manually.

Inside the starting pit the guidingsleeve is threaded via the steelcable and brought into the oldcanal. Then the short pipes arepushed into the old pipeline, oneafter another. This is done by pul-ling the steel cable, which isconnected to a pushing adapter.The new pipes are therefore notpulled in, but pushed in. This en-sures a safe and tightly sealedconnection of the pipe sockets.

Due to the new type cable boomthe pulling force of the GRUNDO-BURST 400 GT can be increasedfrom 50 KN to 160 KN if required. The TIP method is really wor-thwhile, especially for renewingsewage and mixed water canals.

The propulsion speed is between15 m and 20 m per hour, so that itis possible to redevelop two canalreaches per day.

TRACTUELL 14/E 17

P I P E B U R S T I N G

Before

After

The advantages of the TIP method:• small to medium sized deformati-ons and offsettings can be evenedout

• restoration of the circular profile• up to 2 canal reaches per day can berenewed.

• solid girder, prepared ex factorywith new limit of wear and longservice life

• no annular filling required• min. reduction of the cross-section • applicable for various types of da-mages, e.g. tears, root infestations,leakages, forming of fragments

• safely applicable according to ack-nowledged technical standards

• no injection of the damaged area re-quired for ground water infiltrati-on, due to the method

• low jobsite set-up requirements:less personnel and space required

• trechchless connection of house ser-vice lines from old pipe diameterND 250 on

• no underground constructionworks (except long pipes)

Not only the contractor himself,but also the applier of the staticpipe bursting system GRUNDO-BURST profits from this advanceddevelopment.

TIP demonstration jobsiteCustomer: City of Olpe/Germany, Civil engineering office Execution: TRACTO-TECHNIK GmbH, 57368 Lennestadt Place: City of Olpe / Gördeler WegAltrohr: Stoneware ND 250Medium: SewageInstallation length: 30 mDamage: Deformations / cracks and fragmentationHouse connections: nonNew pipe- Type: PP-HM- Pipe size: OD 242 x 13,0 mm- Pipe section length: 0,5 m Machine and equipment:- Machine type: GRUNDOBURST 400 GT - Guiding sleeve: OD 245 mm

GRUNDOBURST can be used forthe pipe bursting method as wellas for the TIP-method and also forregular relinings (short and longpipes).

TRACTUELL 14/E18

WMZ installs lake retrieval pipe:

Spectacular underwater

achievement

Lake Constance

Lake Constance is the deepest (250 m)and largest (580 km2) lake in Germany,it is alos a huge drinking water reser-voir which supplies extensive areas ofSouthern Germany. The University ofConstance uses the lakewater for coo-ling their climate control and researchunits.

The lakewater is taken from a grey castiron pipe over a 400 m length at adepth of 45 m which is in turn sup-plied from a retrieval shaft. The neigh-bouring pumping station sucks waterout of the retrieval shaft and conveys itvia a 500 m length, 250 mm grey castiron pipe into a raised container. Fromthere the university is supplied withcooling water at 5°C through a 900 mlength of 250mm cast iron pipe, whichafter usage in a natural manner, canflow back into the Lake Constance.

As the university’s library was exten-ded with a further building there is anincreased requirement for coolingwater. The capacity of the existing coo-ling water supply system is 60 l/s andinsufficient to cover the requirementsall year round. Therefore, additionalfresh water had to be fed from the net-work. In addition the 90 year old landpipeline between the pumping factoryEgg, the raised container at Allmann-sorf and the University Constance, aswell as the 400 m long lake pipelinewere in a poor condition, which calledfor a renewal of the pipes.

The overland pipeline was already re-placed in the Winter of 2002/ 2003with a 400 mm grey cast iron pipe. Therenewal of the lake intake pipe wasscheduled for Winter 2003/ 2004 andwas to be installed over a 100 m lengthfrom the retrieval shaft right into theLake Constance using the HDD me-thod.

The new retrieval shaft, with a base ap-prox. 7 m below the ground and a dia-meter of 4,20 m, was surrounded by anopen cut sheet pile wall and wouldlater be installed with two drainpumps and kept in a dry condition.

The drilling company WMZ fromLauingen, as sub-contractor, was tocarry out the drilling work andKlumpp GmbH from Offenburg thepipe installation work.

The new HDPE OD 500 mm lake pipewith aa wall thickness of 45,4 mm hada total length of 320 m and should belaid over a distance of 210 m at an ap-prox. depth of 40 m on the lakebed.The topographical and geological con-ditions within the bore path required abore depth of 20 m. The ground explo-ration samples identified soft sandsto-ne in the top layers and clay and marlin the deeper layers.

The bore itself showed no unsolvableproblems. The challenge was seen incontrolling the buoyancy and loweringand installation of the pipes belowwater. The following measures wereagreed upon:For the installation a multi-layer pipewas used. The 12 m pipes were to bejoined together by butt-welding.The part of the welded pipe string,which is to be lowered onto the lake-bed, had to be ballasted on the em-bankment by means of 50 concreteblocks with a weight descendancy of400 kg each, placed at distances of 4 mon each of the pipes.A controlled flooding of the pipe wasrequired for the lowering process. To hold the pipe string above water ina stable position and under water, floa-ting at the installation height of about20 m, 6 pontoons at distances of 55m each apart were necessary. Thepontoons were equipped with winchesfor lowering the pipe string to a depthof approx. 20 m . The max. pulling of the Grundodrillboring unit of 20 t had to be taken intoaccount. With a dead weight of 15 tand an additional 20 t concrete weighta max. pulling force of 10 t was expec-ted underwater. A diving team was ready for action tocarry out any retrieval or assemblywork under water.The city works Constance had a ferrywith a cable dredger waiting.After constructing the retrieval shaftthe pilot bore could begin. The Grun-dodrill bore unit (Manufacturer: Trac-to-Technik, Lennestadt) was positio-ned approx. 30 m away from the retrie-val shaft, to be able to reach the instal-lation depth at the invert of the retrie-val shaft. After 70 m the bore headsuddenly met a difficult to penetratesandy stone layer, which required theuse of a GRUNDOROCK rock drillingmud motor. The pilot bore took 2 daysto complete.

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TRACTUELL 14/E 19

H D D S Y S T E M S

Bore path: Pumping factory Egg, to the west, adjacent to the existing pipe at a distance of approx. 17 m

Total length: 320 m

Length of the pipe section laid on ground in the flatwater zone (bore): 110 m

Length of the pipe section laid on the lake floorin the area between dump and deep zone: 210 m

Water depth at withdrawal point: approx. 50 m

Product pipe: OD 500, wall thickness 45,5 mm, coating PP 3 mm

Shaft depth: 7 m

Shaft diameter: 4,20 m

The loaded pipe string with the swimmingbodies is pushed into the lake with thehelp of a cable dredger. Then it is connec-ted to the backreamer.

The pontoons which were necessary to hold the pipe string above water in stable postion.

Upsizing back reaming bores followed,in diameters of 250, 350, 500 and 625mm. After 6 working days these werecompleted. After the final upsizingbore the 640mm backreamer was pus-hed far out to lake with the drill rodsthrough the bore hole, to keep thestrain of the drill rods to a minimumfor the retrieval process. The diverswere required once again, to fasten atension chain to the backreamer. In themeantime the pipe string was alignedat lake and ready for pipe installation.

The tension rose with all the partici-pants. An engineer was in position oneach of the pontoons. The pipe stringwas flooded. Simultaneously the lowe-ring procedure at all pontoons began.The planners had got their sums right.The pipe disappeared slowly below thewater surface, until only the pontoonswere visible. A sense of relief was feltby all. But the last hurdle - the pipe in-stallation itself – was still ahead. Du-ring the pulling-in process a suddenresistance was clearly detected in thebore hole. The pulling force was alrea-dy at 12 t. The WMZ team guessed that

a rock must have got jammed in frontof the pipe. With a great amount ofsensitivity and support from the dril-ling fluid the resistance slackened offafter 2 further drill rod lengths. Thepulling force dropped drastically to 7 -8 t. There were no further problems.The cycle time for each drill rod was 3minutes. The arrival of the pipe stringin the retrieval shaft signalled great ap-plause and appreciation from all theattendees. After the installation processthe corresponding connection workswere carried out. The retrieval line wasfinally lowered to the bottom of thelake and the pontoons were disassemb-led.

Due to the application of the HDDtechnology the ecology of the flatwater zone and the immediate neigh-bouring coastal garden of the universi-ty in Constance had hardly been di-sturbed and therefore met with greatapproval from the council, the fishingsupervisor, the university biologistsand the lake research institute in Lan-genargen.

TRACTUELL 14/E20

The existing mixing draining plant inHattingen/Germany and the open-air swimming pool were no longerup to latest technical standards andhad to be renewed. In connectionwith this renewal a collector will beproduced, which will divert the rain-water to the river Ruhr. This collec-tor reaches a slope of 50% in the cen-tre, or to be more precise, over alength of 97,50 m a height variationof 30 m. To stop the energy speedarising, a whirlpool shaft at the endof the steep slope is to be erected.

Beermann installs rainwater sewer pipe

ND 560 through rock

conditions a penetration without abore hole motor for rock was notpossible. Therefore a tender was pla-ced. The company Beerman fromRiesenbeck/Germany was awardedthe task, due to their competenceand experience. The duration of thejob was set at two weeks.

The jobsite took almost 2 days to setup and included the production ofthe Bentonite collection pits, the in-stallation of the whole bore equip-ment as well as preparations, such asfresh water supply and mixing ofBentonite. Rock-drilling requires ahigh Bentonite consumption of up to300 l/min. Taking this into account amixed Bentonite quantity was heldin a 20 m3 buffer tank. Added to this

By installing this collective line thepublic works in Hattingen are able tocompletely control the diversion intothe Ruhr river.

The extremely steep terrain withmany old trees was very dense con-taining shrubbery The ground ins-pections showed that there was astrong chance of meeting fissuredclay, compact rocks with high textu-re firmness and coal particles in theplanned bore path at a depth ofabout 8 to 10 m. Due to these soil

Customer: City of Hattingen/Germany

Contractor: Beermann, Hörstel/Germany

Machine: Grundodrill 20 S and PD 50/33

Equipment Grundorock mud motor, mixing and recyling unit

Job: Installation of a rainwater canal from a draining plant into the river Ruhr with a height variation of 30 m

Soil conditions: Dense soil with shrubbery in extremely steep terrain;Fissured clay, compact rocks with high texture firmness and coal particles in the area of thr bore path

Installation length: 97,50 m

Product pipe: PE-pipe 560 x 50,8 SDR 11

Weight of pipe string: 8 tons

Total installation time: 2 weeks

TRACTUELL 14/E 21

there was a mixing tank with a furt-her 7 m_ capacity, as well as the atta-ched recycling system, in which usedBentonite was re-produced for re-useby separating any particles and pre-paration in the mixing tank with ap-prox. 10 kg/m3 Swell Gel. The pro-portion for a new mixture has incomparison 30 – 50 kg/m3 Swell Gel.At the end of the operation a giganticamount of 900m3 used Bentonite wasrecycled and mixed.

For the pilot bore Beermann chosethe Grundodrill 20S mainly down toeconomical reasonsnd the flexiblityof the drill rods. Because the 20-tbore rig was going to be taken to itslimits for the clearance bores and thepipe installation, a 50t unit PD 50/33from Prime Drilling was used forback reaming and pipe installation.

Close to the bore unit and also in thetarget area Bentonite collecting pitswere dug up. The used Bentonitewas pumped via an overhead instal-led pipe to the recycling unit. Thestony material which broke out andwas rinsed out remained in the pitand if necessary was excavated. As afurther preparation measure the boreaxis for the drilling fluid was measu-red and a profile cross-section wasproduced. The measuring team wasthen able to measure the intendeddepths and compare them to the ac-tual depths and, if necessary, makeany corrections.

The first upsizing bore with a 280mm backreamer was carried out sur-prisingly without any problems andtook approx. 6 hours. The second ex-panded bore with a 450 mm backrea-mer took approx. 24 hours though

and showed that after approx. 50 mat approx. 6 m length harder stonelayers had to be penetrated. Therefo-re the next expanded bore was car-ried out with a 560 mm backreamerand successfully carried out after ap-prox. 7 hours. The last expandedbore with a 680 mm backreamer tooka little longer again, approx. 14hours. On two occasions the backre-amer had to be driven back in a diffi-cult section and the worn-off bits re-newed. After this expanded bore thebackreamer was not disassembled,but driven back into the bore for thepipe installation. A total of 38 m3

rock was displaced out of the borehole.

At last the bore canal was ready forthe pipe installation. On the otherside of the River Ruhr the pipe

string, weighing 8 t was already wel-ded together and aided by a cablewinch, as well as supported by awheel loader, moved to the otherside of the Ruhr. There a crane setthe pipes into position for connectionto the backreamer and held it duringthe entire pulling-in process at about3 m height above the railway tracks.The pipe installation took less than 2hours.

Willy Paukstat, subsidiary manager,wanted to be sure that the pipewould not slide backwards and deci-ded to carry out an annulus compac-tion process. This rounded off thepipe installation. Now work could bestarted on the whirlpool shaft andthe connection to the old shaft.

Below: The new whirlpool shaft.

H D D S Y S T E M S

TRACTUELL 14/E22

The pontoon carrying the boring equipment.The Grundodrill 12 G-bore unit duringthe pipe installation

Boring in the mud-flatsThe holm "Nordstrandischmoor”with its 18 inhabitants is a smallNorth Sea island in the mud-flats. Asmall passage leading through adam connects the island to the main-land 5 km away. On the other side ofthe island the company Paasch, fromDamendorf, a subsidiary of Gü-strow, had to accomplish an unusualjob.

In front of the dyke on the mainlanda large jobsite sign was erected to no-tify the public that the water supplyboard Oeversee is installing a drin-king water pipe 225 x 17,3 mm over alength of 5.200 m to the holm Nord-strandischmoor. The reason for thisproject is that an existing 225 mm as-bestos cement pipe laid in 1964, hadto be renewed because of its age.Two PE-steel armoured sea pipes, in-stalled in 1990, were to be connectedto the newly installed pipes at thetransfer shaft at Hallig and to themainland. The 355 mm pipes havealready been installed into the trans-fer shaft from the sea below thedykes by employing the HDD me-thod.

The owner of the executing com-pany, Benno Paasch, explains: "Sincethe middle of June we have onlybeen able to work at ebb-tide. Thetides determine our operating timeand the flood-tide is always bearingdown on us. First of all using theplow method the pipe was installedat a depth of 1,50 m over approxima-

tely 400 m towards Hallig. A cableand plow unit was used fromFöckersperger, who developed, con-structed and successfully applied thefirst hydraulically adjustable plowfor the installation of pipes in Bava-ria. With this technique up to 24 ca-bles or pipes up to 355 mm pipe dia-meter can be trenchlessly installed si-multaneously. The installation unit consists of awinching unit suitable for terrainsand the cable plow. With the plowplate, which is lowered to the requi-red depth into the starting pit, thepenetration for the hollow space forthe installation is produced. The pipe

itself is fed in via the installationshaft and pulled in parallel to theplow route.

For this application the unit had tobe adapted to meet the prevailingconditions in the mud-flats. The win-ching unit with cable winch and an-choring plate was equipped with anundercarriage with rubber tracks.The undercarriage of the pipe andcable plow with it’s four all-roundhydraulically adjustable extensionswith runners was adapted to overco-me the uneven surfaces and keep thesoil load to a minimum. Even thoughthis conversion work took several

Customer: Water supply board Oveversee/Germany

Contractor: Company Paasch, Damendorf/Germany

Machine: Pipe and cable plow from Föckersperger andGrundodrill 12 G from TractoTtechnik

Job: Installation of a drinking water pipe from the mainland through the mud-flats to the holm “Nordstrandischmoor” in the North Sea

Characteristics. The pipe was actually installed applying the plow method, the last 400 meters were imstalled using the Grundodrill. Work was only possible at low tide

Product pipe: PE pipe 225 x 17,3 in sections of 12 m

Installation length: 5200 m

Installation depth: 1,50 m

Total installation time: June - Septemner 2003

TRACTUELL 14/E 23

Pipe pulling.The pipes are ready for installation. The pontoon in the background with the bore rig.

The pipe end in the mud-flats, whichwere installed with the "plow"

weeks, the installation of the drin-king water pipe itself only took 8working days to cover a distance of 4km. Having almost reached the tar-get the ground conditions suddenlybecame softer with less load bearingcapacity for the vehicles, which slo-wly sank despite all precautions. Itwas a dramatic act retrieving thecable and plow unit and the vehiclebefore the flood set in. Due to thevery soft ground conditions the plowcould not be used any more. It wasdecided that the last 400 m would beinstalled by using HDD methods.”

The Grundodrill bore unit type 12 G(manufacturer: Tracto-Technik, Len-nestadt) was working on a pontoonadjacent to the jobsite. The first pilotbore over 200 m length was com-pleted without any problems. Thebore was carried out from the Halligdyke in the direction of the pipe in-stalled by the plow, which had im-merged from the mudflats and wasvisible from the shore.

The bore head submerged at themarked exit point. It was equippedwith wider steering plates so that itcould be steered more easily in thesoft ground. The pipe string wasready for installation. The 12 m pipelengths were welded together withan automatic butt fusion machine asrequested to a total length of 200m.The undercarriage pulls the pipelength into the mud-flats. Over halfthe pipe length has to be separated,as the vehicle became stuck in themud-flats because of the load. Thedrilling crew quickly removed thebore head from the drill rods andattached a 355mm backreamer to thepipe string. Close team-work wasessential as the pipe had to be instal-led before the tide came in. Mean-

while the automatic butt fusion ma-chine is driven into the mud-flatsand during a break the welders suc-cessfully welded the two pipe lengt-hs together. Everything went to planwithout any unforeseeable interrup-tions. At high-tide the pontoon setoff and drove out to the "connectionarea” 200 m away. As soon as ebb-tide set in the last bore began.

The connection of the pipe ends at adepth of 1,50 m was a real challenge.The line was cut free over a length of25 m and 3 – 4 m width at 1,80 mdepth. The team were able toconnect both pipe ends without anyproblems during ebb-tide.BennoPaasch, described the special motiva-tion behind this project and how hiscompany won the tender. "This pro-ject was very special – a once in a li-fetime job. Out here there are diffe-rent elements and you always haveto expect the worst. Once we had astorm and the 8 m wide pontoondrifted 4 m away, despite being an-chored down. This shows the ele-ments we have to fight against here.Paasch were in third place for sub-mission of the public tender, howe-ver the company in second placepostponed their bid due to an admi-nistration error. The company in firstplace had offered a plow method,which did not meet the approval ofthe mud-flat protection regulations,which meant that we were given theofficial go-ahead by the committee.

Initially a pontoon with a captain onboard was supposed to be hired, butPaasch recommended an amphibiantype vehicle, which they hired speci-ally. It can carry a load of 14 t and beused either as a driving or floatingvehicle. If it becomes stuck, then youonly have to wait for the tide. This

was much more flexible and cost-sa-ving and proved to be the best deci-sion. The pontoon was only requiredfor a short time for the plannedbores.

The water supply board took care ofall the licenses. Rangers from the na-tional park kept a close check that allprovisions were met and everythingwas documented in great detail. Anydamages to the surface had to be le-velled out. Every movement of theamphibian vehicle had to be authori-sed. A GPS detection system wasused to ensure that the pipeline wasconstantly surveyed in case of anydamage.

The project was completed at the endof September. We have met the timeschedule extremely well, althoughwith a project of this nature youhave to expect a surprise or two allthe time.”

H D D S Y S T E M S

TRACTUELL 14/E24

450 m bore - Air traffic remains undisturbed

Customer: Rohrleitungsbau Lohr, Ravensburg/German

Contractor: Fa. Max Wild, Berkheim-Illerbachen /Germany

Job: Installation of a drinking water pipe in a protection pipe over 444 m length under a runway

Pipes: Drinking water pipe OD 224Protection pipe HD-PE OD 355 mm

Machine: Grundodrill 20S

Soil conditions: Drifted clay and especially drifted marly ground showing sand contents up to the surface. At depths from 2,5 to 3m increasingly limnic chalk.

Special characrteristics:On the west side of the airport there were underground obstacles such as concrete wall remains, which stem from the first runway and it’s exactposition is unknown. They even suspected battle means in the ground. Furthermore various drainage and sewage canals in various cross-sectionsand depths to the right and parallel to the runway. The bore was carriedout under the strictest safety criteria. At first a terrain was marked and secured with a 1200 m fence and was approved by the German air aviation office. It was not possible to enter the terrain without a pass.

Duration: 5 days

Above: The Grundodrill 20 S bore rigestablishing an upsizing bore

Left: Aerial photo of the Friedrichshafenairport with the bore path indicated

The air traffic remained undisturbed.

TRACTUELL 14/E 25

All-weather protection for GRUNDODRILL X series

Poor weather should not have to cause expensive interrup-tions during jobsites. Therefore, Tracto-Technik has reacted tonumerous customer requests for the Grundodrill X series andhas built a flexible all-weather protection, which can be assem-bled when the weather gets bad and disassembled just asquickly when the weather improves.

The all-weather protection is also a working protection for theoperator, as it keeps out the wind, rain and snow and reducesthe possible danger of illness.

Advantages of the all-wheather protection

• can be retro-fitted for all X-types

• suits the machine design optically

• simple and quick to assemble with only a few steps

• Light construction with low weight of approx. 85 kg

• Plexiglass at front, rear and right

• Entrance with slide foil

• Available upon request in your company colours

• Integrated into the control stand and swivable

• Surrounding view to all sides

• equipped with 2 additional spotlights

Free all-round viewNote: The machine width with weather protection enlarges for approx. 30 cm.

N O V E L T Y

bauma 2004 – The trenchless

TRACTUELL 14/E26

Jubilee bauma broke all records!

With 410.000 the number of trade visitors increased once again incomparison to 2001 – exhibitors were pleased with internationality ofthe trade fair and the number of concluded deals.

• Best result in the 50 year history of the trade fair - visitors from 171 countries (2001: 406.000 visitors from 157 countries)

• Share of international visitors rose from 27 to 31 percent• Higly frequented by visitors from Middle/Eastern Europe and the Eastern Europe/Central Asia as well as from overseas

• Again very high share of decision makers – growing number of visitors representing a company

• Exhibitors report numerous concluded deals and expect extensiveafter exhibition business

• 86 percent of the visitors rank the integration of the bauma mininginto the trade fair concept as „excellent to good“

• Record jubilee bauma: - 20 percent more exhibitors altogeher- International participation icreased by 26 percent- 14 more exhibitors from germany

• bauma + mining 2004 initiates slight optimism about further business activities worldwide and in Germany

concept on 800 m2

B A U M A 2 0 0 4

TRACTUELL 14/E 27

TRACTUELL 14/E28

TR

AC

TU

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TT Group of companies

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Your GRUNDOMAT-Partner:

http://www.tracto-technik.de

TT Technologies Inc.2020 East New York St.USA-Aurora, IL 60504Tel.: +1 630-851-8200Fax: +1 630-851-8299www.tttechnologies.comE-Mail: info@tttechnologies.com

TT UK Ltd10 Windsor RoadGB-Bedford MK 42 9SUTel.: +44 1234.342.566Fax: +44 1234.352.184www.tt-uk.comE-Mail: ttuk@compuserve.com

TT Asia Pacific Pty Ltd31, Demand Avenue, Arundel, Goldcoast, Q 4214 Queensland, AustraliaTel.: +61 (0) 7 55 614 999Fax: +61 (0) 7 55 614 900www.tt-asiapacific.comE-Mail: info@tt-asiapacific.com

Tracto-Technik GmbHHead officeP.O. Box 40 20D-57356 LennestadtTel.: (+49) 2723/8080Fax: (+49) 2723/808189E-Mail: export@tracto-technik.de

Tracto-TechniquesSiège SocialAvenue Benoit FrachonZ. I. de BoulazacF-24750 PérigueuxTel.: +33 5.53.53.89.83Fax: +33 5.53.09.39.41www.tracto-techniques.comE-Mail: info@tracto-techniques.com

Nodig-Construction, the international trade plat-form for trenchless pipe installations and pipe-re-placements has now established a partnershipwith the International Society for TrenchlessTechnologies ISTT.

The coopearion aims at offering additional valuefor ISTT members and providing more and detai-led specialist information to be made available onnodig-construction.com.

From october 2004 on nodig-construction.com.will provide a lot of new and revised information.For example the ISTT will have its own news sec-tion on nodig-construction. The techniques sec-tion will be updated according to the latest ISTTstandard technical papers and ISTT members willhave exlusive access to a large download areaproviding NoDig conference papers from the lastdecades.

The ISTT website www.istt.com will appear in acomplety new layout with several direct links tothe information sources on nodig-construc-tion.com.

nodig-construction.comI N F O R M A T I O N

Par tnership with the ISTT