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…
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Marine structures
Solution
Marine structures Keller offers a full range of services for the marine construction market. This includes the design and construction of new ports, jetties and quays as well as the extension and…
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Wet soil mixing
Technique
Wet soil mixing Wet soil mixing, also known as the deep mixing method, improves the characteristics of weak soils by mechanically mixing them with cementitious binder slurry. Wet soil mixing…
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Mass mixing
Technique
Mass mixing Mass Soil Mixing (MSM), or mass stabilisation, is a ground improvement technique that improves soft or loose soils, by mechanically mixing them with either wet grout or dry cementitious…
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TRD
Technique
TRD Trench cutting and remixing deep (TRD) soil mix walls are mixed-in-place using a specialised vertical cutter post mounted on a base crawler machine. Trench cutting and remixing deep (TRD)…
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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…
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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…
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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-…
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How we work
Landing page
How we work man in yellow jacket with keller logo on the back Code of business conduct Our business code of conduct sets out the principles and standards of behaviour we expect from all our employees…
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Micropile slide stabilisation system
Technique
Micropile slide stabilisation system The micropile slide stabilisation system (MS³) consists of an array of micropiles, working both in tension and compression, that connect as a system using a…
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Canopy / umbrella tubes
Technique
Canopy / umbrella tubes Canopy/umbrella tubes (with diameters of 76-168mm) are a support system used in conventional and mechanical tunnel construction in poor soil conditions. Canopy/umbrella tubes…
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Commercial
Market
Commercial Keller provides geotechnical solutions for the commerical market sector for both existing and planned structures, including office buildings, hotels, distribution centres, retail, data…
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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…
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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…
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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…
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Vibro stone columns / Vibro replacement
Technique
Vibro stone columns / Vibro replacement This technique involves construction of loadbearing columns made from gravel or crushed stones with a vibrator to reinforce all soils in the treatment zone and…
/expertise/techniques/vibro-stone-columns-vibro-replacement
Instrumentation and monitoring
Technique
Instrumentation and monitoring Keller provides systems and services for monitoring the safety and stability of buildings, excavations, bridges, railways, roads, tunnels, dams, embankments and slopes…
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Dry soil mixing
Technique
Dry soil mixing Dry soil mixing is a ground improvement technique that improves soft, high moisture clays, peats, and other weak soils, by mechanically mixing them with dry cementitious binder. Dry…
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Design and build
Content page
Design and build Keller’s broad product portfolio means our engineers have more options when it comes to an effective and efficient designs for our clients. Following fundamental geotechnical theory…
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