Trenchless Overview

7/23/2019 Trenchless Overview

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Trenchless Technology Overview

TRENCHLESS TECHNOLOGYOVERVIEW

Dr. Alan Atalah, P.E.

Asst. Professor at BGSU&

Executive Director ofMidwest Society for Trenchless Technology


TRENCHLESS TECHNOLOGY

A family of methods, materials,equipment, and techniques that can

be used to install, replace,install, replace, renew renew , or , orrepair repair underground infrastructure

with minimal surface disruption anddisturbance by minimizing the need

for excavation


TRENCHLESS TECHNOLOGY

• Applications Water lines

Gas and fuel Lines

Electrical cable and fiber optic lines

Sewer and force main lines

Soil pollution treatment

• Specialized field

• Saver and less environmentally

disruptive• Economical in certain conditions


FOOTPRINT FORTRENCHLESS OPERATIONS

• Less footprint than open cut

• Access and exit shafts

• Working space around each shaft forneeded equipment depends on:

Trenchless system

Size of operation

Storage space

•

Partnership• Balance between cost and benefits


WHY TRENCHLESS TECHNOLOGY








BENEFITS OF TRENCHLESSTECHNOLOGY

• Trenchless Technology Reduces

Disruptions to traffic, business, etc.

Danger to existing underground facilities

Easement requirements

Environmental impacts

Potential for settlement damage

Potential of injuries due to open excavations

Required time & costs


SELECTION CRITERIA

• Type of utility

• Diameter of pipeline

• Depth of the line

• Required accuracy level

• Existence & status of old pipelines

• Available space (horizontally &vertically)

•

Type of soil• Ground water table


SELECTION CRITERIA

• Local contractors

Available trenchless systems

Equipment size

Team experience

Availability of pipes & its accessories

• Environmental constrains

• Dewatering


GENERAL INFORMATIONSITES

• http://www.mstt.org/• http://www.latech.edu/tech/engr/ttc/

• http://nastt.org/

• http://www.no-dig.com/

• http://www.ttmag.com/

• http://trenchlessonline.com

• http://www.tunnelingonline.com/

• http://www.mining-journal.com

• http://www.undergroundinfo.com/


PIPELINES SITES

• http://www.isco-pipe.com/

• http://www.mr-inc.com/

• http://www.no-dig-pipe.com/

• http://www.hobas.com/

• http://www.canclay.com/

• www.permalok.com




PIPE JACKING

• Pipe inserted & advancedinto soil by rams from jacking shaft as soil isexcavated ahead ofleading pipe joint

• New pipes added asrequired until lead pipe

joint reaches come outshaft


MANNED PIPE JACKING

PIPE JACKING APPLICATIONS

• It can be used tocross:

Highway

Railway

Waterway

• It can be used toinstall sewer lines

• The face is

accessible


PIPE JACKING OPERATION

Operatorcontrolssteeringandexcavationinsidetunnel

boringhead


TRANSPORTING THEEXCAVATING MATERIAL


PIPE JACKING

• Product pipe sizes 48” & larger

• Limitations on length & size based onlogistical considerations & safety

• The pipe invert above the ground watertable

• High accuracy in line and grade

• Footprint:

Jacking shaft + working and storing area

Receiving shaft + working area




MICROTUNNELING


THE CUTTING HEAD

• Varies w/ the type of soil

Larger opening with stable

soil

Cutter shape andconfiguration

Water jetting


CRUSHING CONE

• Directly behind thecutting head

• Grinds rock andbolder like the coffeegrinder

• Bolder comes outbetween ½” and 1”



MICROTUNNELING AUGERBORING

• Excavated material istransported from thecrushing cone to the jacking shaft viaflight auger inside asmaller pipe

• Applicable above theground water table

• Dump truck is

needed by the jacking shaft


MICROTUNNELING CONTROLPANEL

• The operatorfrom thecontrol panelcontrols allthe tunnelingoperations




MICROTUNNELING

• Remotely controlled pipe jacking

• Product pipe sizes 12” & larger

• Uses automation for processes

performed by workers within the tunnelon pipe jacking

• Footprint: Jacking shaft + working and storing area

Control panel and power pack

Slurry mixing and separation system

Pipes storage space & pipe handling equipment



MICROTUNNELINGWEBSITES

• http://www.herrenknecht.com

• http://www.microtunneling.com/index.html

• http://www.akkerman.com/


AUGER BORING

• Performed in two steps:

Excavation & installation ofthe casing pipe

Installation of carrier pipe &filling annular space withgrout

• Footprint:

Jacking shaft + working andstoring area

Pipes & pipe handlingequipment

Receiving shaft + workingarea


AUGER BORING


CARRIER PIPE


AUGER BORING CASINGWELDING



AUGER BORING FOOTPRINT AUGER BORINGCAPABILITIES & LIMITATIONS

Capabilities

• Less Costly

• Wide diametersrange

• Pressure lines

Limitations

• Grade & alignmentaccuracy

• Skillful operator isneeded

• Sewer line ?

• Dewatering isneeded


UTILITY TUNNELING FACEEXCAVATION


UTILITY TUNNELING


UTILITY TUNNELING


UTILITY TUNNELING

Performed in two stepsExcavation & Installation of Primary Support

Installation of Secondary Support/Liner System

Product pipe sizes 48” & larger

Limitations on length & size based onlogistical considerations & safety

• Footprint: Jacking shaft + working and storing area

Control panel and power pack

Slurry mixing and separation system






HORIZONTAL DIRECTIONALDRILLING

• Performed in two steps

Drilling of pilot hole using a steerable drill head &locator system

Backreaming to increase pilot hole diameter &

pullback of product pipe

• Product pipe sizes up to about 60”

• Typically used for crossing

• Footprint:

Open excavation at the end points

Drilling rig and power pack

Slurry mixing system

Fused pipes space & pipe handling equipment


Ground Surface

MHDD Rig

Pilot Pipe

Pilot Hole PhasePilot Hole Phase

Ground Surface

Back Reaming PhaseBack Reaming Phase

Back Reamer

Product

Pipe

MHDD Rig

HORIZONTAL DIRECTIONALDRILLING


THE MAJOR COMPONENTSOF A MHDD RIG ARE:

• The Drill Rack

• The Power Unit

• The LubricationSystem

• The LocatingSystem


MHDD TRACKING


MHDD RIG SIDE WORK SPACE


MHDD PIPE SIDE WORK SPACE



Trenchless Technology Overview Trenchless Technology Overview



MHDD CAPABILITIES &LIMITATIONS

Capabilities

• Economical

• Versatile

• Higher flow capacity

• Jointless pipe

• Min. surfacedisturbance

Limitations

• Grade & alignmentaccuracy

• Lateral digging

• Skillful operator is

needed

• Sewer line ?

• Mud fluid


DIRECTIONAL DRILLINGWEBSITES

• http://www.directionaldrilling.com/

• http://www.vermeer.com/

• http://www.ditchwitch.com/

• http://www.baroid.com/z_Baroid.htm

• http://www.tttechnologies.com/




PIPE BURSTING

• Installs a new pipe at the same locationas exiting pipe by demolishing existingpipe in place with a bursting head

• New pipe follows bursting head into place

• Upsizing is available• Product pipe sizes 24” & smaller

• Footprint: Insertion and pulling shafts (depends on

system)

Air compressor & mixer

Fused pipes space & pipe handling equipment


Air Pressure/Hydraulic Hose(Pneumatic & Xpandit)

Direction of Bursting

New Pipe Insertion

Pit

Cable/Rod

Ground Surface

Pulling

Pulling

Pit

PNEUMATIC & HYDRAULICPIPE BURSTING


PNEUMATIC HAMMER


FORCE

WINCH LINE

OLD PIPE

PNEUMATIC TOOL

PULLING EYE

EXPANDERNEW PIPE AIR HOSE

PNEUMATIC HAMMER


HYDRAULICEXPANSIONBURSTING

HEAD(XPANDIT)


STATIC PULL BURSTING HEAD




PIPE

FUSIONMACHINE


PNEUMATIC

SYSTEMPULLINGWINCH


STATIC PULLSYSTEM’SPULLINGWINCH


PIPE RAMMING

• Performed in two steps:

Installation of the casing pipe by ramming

Cleaning of casing pipe interior, installationof carrier pipe, and filling annular spacewith grout

• Footprint:

long insertion shaft

Air compressor

steel pipes space & pipe handling equipment


PIPE RAMMING


PIPELINE REHABILITATION




PIPELINE REHABILITATION

REHABILITATION

Cured in Place Sliplining Defor med & Re shaped Inline Replacement

Inverted in Place

Winched in Place

Continuous

Segmental

Spiral Wound

Fold & Form

Deform & Reform

Drawdown

Rolldown

Pipe Bursting

Pipe Removers

Pneumatic

Static

Hydraulic


CURED-IN-PLACE PIPE (CIPP)

• Installs a resin-impregnated, thin-walled liner tube inside of host pipe

• Liner resin is cured with the liner in

place inside of the host pipe• Creates a new liner pipe within the host

pipe

• Available in a variety of diameters &shapes


RESIN S TUR TED

TUBE

OLD PIPE

INVERSION

ELBOW

MANHOLE

LINER

OLD PIPE

FABRIC W/

STURATED RESIN

IMPEREABLEINNER LAYER



WOVEN HOSE LINING


CIPP RESIN IMPREGNATION






CIPP FOOTPRINT


BYPASS PUMPING FOR 60”


SLIPLINING

• Installation of a new pipe within existing pipe

• Sliplining pipe is pulled (continuous pipe) orpushed (segmental pipe) into place

• Grouting to fill annular space between host &sliplining pipes

• Footprint:

Insertion OR pulling shafts (depends on system)


Fused pipe

Pipe segments


SLIPLINING

• Larger Size(>36”)

• Considerations

Access

Manhole tomanhole

Installation

In the wet?

Bypass pumping

Annular spaceGrouted?


SLIPLINING


DEFORM & FORM PIPE

• Plastic pipe is deformed in the factoryinto a shape that will allow it to beinserted within the host pipe

• After being inserted into the host pipe,the deformed pipe is restored to itsoriginal size, forming a tight fit againstthe inside of the host pipe

• Available for pipes up to 24” diameter

• Footprint: winch, pipe rack, boiler truck




DEFORM & FORM PIPE


U-LINER DEFORM AND FOLD


DEFORMED & FORM PIPE


ROLLDOWN TECHNIQUE

• Temporary reduction of HDPE pipediameter to allow for installation withinhost pipe

• Restored to original diameter to formtight fit against inside wall of host pipe


ROLLDOWN TECHNIQUE




ROLLDOWN FOOTPRINT

• Insertion & pulling access points

• Lateral connection open cut connection

• Rolldown equipment

• Fused pipe storage space


PIPE REPAIR

• Grouting

Internal

External

• Mechanical Sealing

• Robotic Repairs

• Point Repairs


GROUTING

• Installation of grout to seal defects inpipe wall, joints, or stabilize voidsoutside of pipe

• Internal grouting is typically installedusing remote joint packers or byworkers

• External grouting installed from withinthe host pipe or from borings madefrom the surface


GROUTING


MECHANICAL SEALING

• Installation ofmechanical sealingbands from withinthe host pipe

• Leakage elimination& control


MECHANICAL SEALING




ROBOTIC REPAIRS

• Uses remotely controlled robots toperform repairs from within the pipe

• Leakage abatement & structural repairs


ROBOTIC REPAIRS


POINT REPAIRS

• Non-man entry sizes-Uses short lengthsof CIPP with remotely controlledpackers to repair from inside pipe

• Man entry diameters-deformed pipesinstalled by workers from inside sewer

• From the surface-use minimalexcavation techniques such as avacuum excavator


POINT REPAIRS


REHABILITATION WEBSITES

• http://www.insituform.com/

• http://www.blackhawk-pas.com/

• http://www.rinker.com/pipelinesystems

• http://www.northamericanpipe.com/pspec.htm

• www.mpc-tech.com

• http://www.amliner.com/index.html

• http://www.undergroundsolutions.com/


CONCLUSIONS• Trenchless techniques are proven technologies

gaining ground in capabilities & use• Successful use of trenchless (or any technology)

requires careful consideration of its strengths &weaknesses

• Trenchless technologies are powerful toolsavailable to us

• Less footprint than open cut

• Access and exit shafts

• Working space around each shaft for neededequipment depends on:

Trenchless system

Size of operation

Storage space

Documents

Trenchless Overview