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 Common…
/en/expertise/techniques/wet-soil-mixing
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…
/en/expertise/techniques/mass-mixing
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…
/en/expertise/techniques/soil-nails
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…
/en/expertise/techniques/compensation-fracture-grouting
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-…
/en/expertise/techniques/driven-cast-situ-piles
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…
/en/expertise/techniques/cfa-piles-auger-cast
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…
/en/expertise/techniques/vibro-compaction
Vibro stone and concrete columns
Technique
Vibro stone and concrete columns 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…
/en/expertise/techniques/vibro-stone-and-concrete-columns
Wick / PVDs / band drains
Technique
Wick / PVDs / band drains Wick drains, also known as Prefabricated Vertical Drains (PVD) are prefabricated geotextile filter-wrapped plastic strips with molded channels. These act as drainage paths…
/en/expertise/techniques/wick-pvds-band-drains
Dynamic compaction
Technique
Dynamic compaction Dynamic compaction involves the controlled impact of a crane hoisted weight, of around 10-30 tonnes, falling in a pre-determined grid pattern to improve loose, granular soils and…
/en/expertise/techniques/dynamic-compaction
Rapid impact compaction (RIC)
Technique
Rapid impact compaction (RIC) Rapid impact compaction densifies shallow, granular soils, using a hydraulic hammer, which repeatedly strikes an impact plate on the ground surface. Rapid impact…
/en/expertise/techniques/rapid-impact-compaction-ric
Compaction grouting
Technique
Compaction grouting Low mobility (compaction) grouting involves the injection of a low slump, mortar grout to densify loose, granular soils and stabilise subsurface voids or sinkholes. Compaction…
/en/expertise/techniques/compaction-grouting
Cavity/bulk/mine fill grouting
Technique
Cavity/bulk/mine fill grouting Bulk filling generally uses a cement/pulverised fuel ash (PFA) mix to suit site conditions with compressive strengths in the order of 1.0 N/mm2. The mixes may include…
/en/expertise/techniques/cavity-bulk-mine-fill-grouting
Driven precast piles
Technique
Driven precast piles Driven piles are deep foundation elements installed using impact or vibration hammers to a design depth or resistance. Driven precast piles illustration Common uses Can be used…
/en/expertise/techniques/driven-precast-piles
Micropiles
Technique
Micropiles Micropiles, also known as minipiles, pin piles, needle piles, and root piles, are a deep foundation element constructed using high-strength, small-diameter steel casing and/or threaded…
/en/expertise/techniques/micropiles
Bored piles / drilled shafts
Technique
Bored piles / drilled shafts Bored piles are a very effective, state-of-the-art construction element with many applications in foundation and civil engineering. Bore piles illustration Common uses As…
/en/expertise/techniques/bored-piles-drilled-shafts
Secant pile walls
Technique
Secant pile walls A secant pile wall consists of overlapping (secant) piles to form structural or cutoff walls and achieve the required water tightness. The design can incorporate steel bar or beams…
/en/expertise/techniques/secant-pile-walls
Dynamic replacement
Technique
Dynamic replacement Dynamic replacement is a variation on dynamic compaction and uses the energy of a falling weight to drive large diameter granular columns into cohesionless soils and fills.…
/en/expertise/techniques/dynamic-replacement
Bridge construction
Technique
Bridge construction A bridge crossing a body of water creates difficult conditions for the construction of its foundations. Keller can use various techniques to meet the challenges according to the…
/en/expertise/techniques/bridge-construction
Jetty construction
Technique
Jetty construction Keller has the experience and expertise to construct long jetties into deep water to allow the berthing of large vessels without the need for any dredging. Keller rig on a barge…
/en/expertise/techniques/jetty-construction