Brochure 1000-09E

Excavation PitsComplete package solutions

Each project and site requires custom made solutions for the design and construction of deep excavation pits.

� Excavation pits with various support systems

� Excavation pits with complex underpinning

� Excavation pits for the mitigation of environmental hazards

If you have further questions, please contact us or visit our website. Here you can order a DVD or a USB stick with all Keller publications.

General Requirements for Excavation Pits

When designing and constructing excavation pits, complex boundary conditions and performance requirements need to be taken into account.

Boundary Conditions

1 Soil ConditionsDifficult soil conditions (stratigraphy, obstructions, existing slopes etc.) require careful design and planning and an appropriate selection of the solution.

2 Ground waterProtection of the ground water against pollution and prevention of water ingress into the excavation pits.

3 Plot boundariesNeighboring plots and existing rights of way require particular care when designing the support structure and the construction sequence.

4 Existing BuildingsAdjacent buildings must not be damaged by the works. Particularly the serviceability of the existing building foundations must not be compromised, which often requires additional support and underpinning to secure them.

5 Underground servicesUnderground services such as sewage and water pipes, power lines and communication cables must remain in service, especially in densely populated areas such as city centers.

6 TrafficTraffic flow should be hampered as little as possible and existing traffic infrastructure needs to be protected against damage.

7 Varying excavation depthsSome projects require excavation depths to vary across the site for a range of solutions may be required.

Design and Execution Planning

Requirements

� minimal impact on existing structures

� no disturbance to running operations

� optimum use of plot space

� integration of the foundation system into the overall structure

� minimal deflections even for deep excavation pits

� conformity to environmental standards

� efficient construction with optimum material utilization and minimal waste

� monitoring with detailed records

� close cooperation between owner, designer and foundation specialist

Excavation pits including protection of existing structures Excavation pits for infrastructure works

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Build on our strengths

Keller offers flexible solutions and specialist techniques to solve even highly complex excavation support problems. It is an integral part of our company philosophy to work to industry leading quality and environmental standards.

MethodsSolutions

1 Excavation support systems

� Sheet pile walls � Soilcrete®-walls and underpinning � Diaphragm walls � King post walls � Bored pile walls � Shotcrete � Combined walls

(e. g. bored piles and Soilcrete®) � Deep Mixing Method/Tubular Soil

Mixing with inserted steel beams

2 Excavation pit wall support

� Anchors � Soil nails � Internal steel struts

3 Base Slabs � Jet Grouting (Soilcrete®) � Soft gel chemical grout

sealing barrier � Underwater concrete

4 Uplift Tension � Bored piles � Micro piles

5 Protection of existing facilities

� Soilcrete®-Underpinning � Jet grouting � Soilfrac®-Fan

6 Measurements � Monitoring � Control � Documentation

Construction

� One stop service for excavation pit, including in-house design and equipment

� Solutions combining several techniques

� Construction of complex underpinning as part of the excavation support package

� Low vibration and resource efficient construction

� Use of environmentally friendly materials

� Continuous monitoring

� Competent and flexible response when unexpected problems are encountered

� Customer friendly, fast and direct communication between Keller and the Team

� More than 150 years of experience in the foundations and ground engineering business

Excavation pits in densely built up areas Excavation pits in live industrial plants

Solving complex foundation problems with customized solutions and methods developed in house is our strength!

We will be pleased to support your team with our solutions!

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w w w.KellerHolding.com A company of Keller Group plc

Reference Projects

� Excavation pits for residential buildings

2015 Residence Pearls Sky, Phase 2, Kwa-Zulu Natal, South Africa

2014 Aderstraße, Düsseldorf, Germany

2014 Leopoldstraße, Düsseldorf, Germany

2012 ESI Integrated Steel Plant, Phase 2B, Abu Dhabi, UAE

2012 Residence Wlassakstraße, Vienna, Austria

2012 Accommodation Block, Featherstone Prison, UK

2011 Nass Centre, Zubara Ave, Manama, Bahrain

2011 Ministry of Finance, 6 storey building, Manama, Bahrain

2011 Sheet piling excavation pit Goldenes Haus (residence), Berlin, Germany

2011 Villa Lieta, Verona, Italy

2011 Residence in Libeňsky Pivovar, Czech Republic

2010 ESI Heavy Section Mill, Abu Dhabi, UAE

2010 Department store Aupark, Košice, Slovakia

� Excavation pits for industrial facilities

2014 Flood protection, Kulmbach, Germany

2012 Garage IKEA, Bratislava, Slovakia

2012 New Airport Terminal, Heathrow, UK

2011 Trough excavation pit, Eastern Harbour Berlin, Germany

2011 Secant Wall, Shell Plant, Bacton, UK

2011 Eishockey hall, Bratislava, Slovakia

2011 Sottopasso Iper Montebello, Monza, Italy

2010 Saudi Kayan Petrochemical Complex, Jubail, Saudi Arabia

2010 Reconstruction rail bridge Kolín SO 4206, Czech Republic

� Inner city excavation pits

2011–2015 German Opera House, Berlin, Germany

2015 Discovery Basement, Sandton, South Africa

2015 Old Mutual Building, Sandton, South Africa

2015 Village Walk, Sandton, South Africa

2014 Hospital Barmherzige Brüder, Trier, Germany

2014 Research and laboratory building, Humboldt-University, Berlin, Germany

2013 Opera House and Redoutenhaus, Bayreuth, Germany

2013 Sasol Head Office, Sandton, South Africa

2012 Na Prikope 14, Praha, Czech Republic

2012 British Museum Redevelopment, London, UK

2012 Linea B1, Metropolitana di Roma, Pozzi Ionio, Rome, Italy

2011 Piling wall in combination with Ground improvement, Schliersee, Germany

2011 Trog pit, Palais am Deutschen Theater (Residential and commercial building), Berlin, Germany

2011 IK hotel, Budapest, Hungaria

2011 JAMU – music akademy, Brno, Czech Republic

Keller Group plcGround Engineering Contractorswww.keller.co.uk

Keller Holding GmbHwww.kellerholding.com

Europe

Keller Grundbau GmbHKaiserleistrasse 863067 OffenbachGermanywww.kellergrundbau.de

Keller Fondations Spéciales2 rue Denis Papin - CS 69224 Duttlenheim67129 Molsheim CedexFrancewww.keller-france.com

Keller Grundbau Ges.mbHMariahilfer Strasse 127a1150 ViennaAustriawww.kellergrundbau.at

Keller UKOxford Road · Ryton-on-DunsmoreCoventry CV8 3EGUnited Kingdomwww.keller-uk.com

Keller Polska Sp. z o.o.ul. Poznańska 17205-850 Ożarów Mazowiecki (Warsaw)Polandwww.keller.com.pl

Keller Cimentaciones, S.L.U.Miguel Yuste 45, bis28037 MadridSpainwww.keller-cimentaciones.com

Middle East

Keller Grundbau GmbHDubai BranchOffice No. 408Al Mansour Building Damascus Street, Al QusaisDubai, UAEwww.kellerme.com

Africa

Franki Africa674 Pretoria Main Road,Wynberg, 2090 SandtonP.O. Box 39075, Bramley, 2018 South Africawww.franki.co.za

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