Excavation support
Solution
Excavation support During construction it is often necessary to form a stable excavation and to ensure that any associated movement will not damage neighbouring structures or utilities. Keller offers…
/expertise/solutions/excavation-support
Deep soil mixing - wet method
Technique
Deep soil mixing - wet method Deep soil mixing (DSM), improves the characteristics of weak soils by mechanically mixing them with cementitious binder slurry. Wet soil mixing illustration Common uses…
/expertise/techniques/deep-soil-mixing-wet-method
Soil nails
Technique
Soil nails Soil nailing uses grouted, tension-resisting steel elements (nails) to reinforce in situ soils and creating a gravity retaining wall for permanent or temporary excavation support. Soil…
/expertise/techniques/soil-nails
Heave control
Solution
Heave control When wet soils swell and can’t expand downwards or sideways, the soil rises up and exposes the upper surface, effectively the opposite of subsidence. While displacement may be…
/expertise/solutions/heave-control
Compensation / fracture grouting
Technique
Compensation / fracture grouting Compensation or fracture grouting is the injection of a cement slurry grout into the soil creating and filling fractures that then lift the overlying soil and…
/expertise/techniques/compensation-fracture-grouting
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Keller at a glance
Resource
Keller at a glance Keller at a glance Flyer Facts and figures about Keller Group Download
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Driven cast in-situ piles
Technique
Driven cast in-situ piles Driven cast in-situ (DCIS) piles are constructed by driving a closed-ended hollow steel or concrete casing into the ground and then filling it with concrete. Driven cast in-…
/expertise/techniques/driven-cast-in-situ-piles
How we work
Landing page
How we work man in yellow jacket with keller logo on the back Code of conduct Our business code of conduct sets out the principles and standards of behaviour we expect from all our employees. Our…
/how-we-work
Commercial
Market
Commercial Keller provides geotechnical solutions for the commerical market for both existing and planned structures, including office buildings, hotels, malls, distribution centres and other…
/expertise/markets/commercial
CFA piles (auger cast)
Technique
CFA piles (auger cast) Continuous flight auger (CFA) piles are a type of bored cast-in-place replacement pile. Piles are drilled and concreted in one continuous operation enabling much faster…
/expertise/techniques/cfa-piles-auger-cast
Permeation grouting
Technique
Permeation grouting Permeation grouting, also known as cement grouting or pressure grouting, fills cracks or voids in soil and rock and permeates coarse, granular soils with flowable particulate…
/expertise/techniques/permeation-grouting
Vibro compaction
Technique
Vibro compaction Vibro compaction is a ground improvement technique that densifies clean, cohesionless granular soils with a downhole vibrator. It’s a technique first developed by Keller in the 1930s…
/expertise/techniques/vibro-compaction
Vibro stone columns
Technique
Vibro stone columns This technique involves construction of loadbearing columns made from gravel or crushed stones that can share the load with the surrounding soil. Vibro stone columns illustration…
/expertise/techniques/vibro-stone-columns
Deep soil mixing - dry method
Technique
Deep soil mixing - dry method Deep soil mixing (DSM) is a ground improvement technique that improves soft, high moisture clays, peats, and other weak soils, by mechanically mixing them with dry…
/expertise/techniques/deep-soil-mixing-dry-method
Our history
Content page
Our history Johann Keller 1860 Johann Keller established 1930 Keller invented the vibro ground improvement method. 1973 Keller's Overseas Division established the first branch in Bahrain to…
/about-us/our-history
Re-levelling structures
Solution
Re-levelling structures Subsidence, the gradual downward movement of a building or structure, can result in damage to buildings. Keller can apply re-levelling techniques to bring buildings back to…
/expertise/solutions/re-levelling-structures
Employment practices
Content page
Employment practices Our people are our most valuable asset. We are committed to creating a work environment and culture that brings out their best and keeps Keller a great place to work. Equal…
/how-we-work/employment-practices
Prefabricated Vertical Drains (PVD)
Technique
Prefabricated Vertical Drains (PVD) Prefabricated Vertical Drains, also known as Wick Drains or band drains are prefabricated geotextile filter-wrapped plastic strips with moulded channels. These act…
/expertise/techniques/prefabricated-vertical-drains-pvd
Rigid inclusions
Technique
Rigid inclusions Rigid inclusions (RI) is a ground improvement method using high deformation modulus columns constructed through compressible soils to reduce settlement and increase bearing capacity…
/expertise/techniques/rigid-inclusions
Mixed modulus columns CMM ®
Technique
Mixed modulus columns CMM ® Columns with Mixed moduli CMM® is a ground improvement method using low deformation modulus columns or a rigid inclusion constructed through compressible soils with a…
/expertise/techniques/mixed-modulus-columns