Wet soil mixing
Technique
Wet soil mixing Wet soil mixing, also known as deep soil mixing, improves the characteristics of weak soils by mechanically mixing them with a cementitious binder slurry. Wet soil mixing Common uses…
/expertise/techniques/wet-soil-mixing
Mass mixing
Technique
Mass mixing Mass mixing (MSM) is a specialised technique used to improve soft soils and loose sands, as well as fill materials. The technique is very flexible and can be used over water and on land.…
/expertise/techniques/mass-mixing
Soil nails
Technique
Soil nails Soil nailing uses grouted, tension-resisting steel or glass fibre composite elements (nails) to reinforce in situ soils to create a gravity retaining wall for permanent or temporary…
/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 can then be potentially used to lift the…
/expertise/techniques/compensation-fracture-grouting
Driven steel piles
Technique
Driven steel piles Driven steel piles are installed using impact or vibration hammers to a design depth or resistance. Keller installs the complete suite of driven piles from small diameter tube…
/expertise/techniques/driven-steel-piles
Canopy / umbrella tubes
Technique
Canopy / umbrella tubes Canopy/umbrella tubes (with diameters of typically 76-168mm but occasionally larger) are a support system used in conventional and mechanical tunnel construction in poor soil…
/expertise/techniques/canopy-umbrella-tubes
CFA piles
Technique
CFA piles Continuous flight auger piles (CFA) are cast-in-place piles, using a single continuous hollow stemed auger. Vibration free and low noise, this environmentally friendly piling system is…
/expertise/techniques/cfa-piles
Permeation grouting
Technique
Permeation grouting Permeation grouting, also known as cement grouting or pressure grouting, permeates coarse, granular soils with flowable particulate grouts to create a cemented mass. Permeation…
/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 with a vibrator to reinforce all soils in the treatment zone and densify surrounding…
/expertise/techniques/vibro-stone-columns
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 cohesive soils, by mechanically mixing them with dry cementitious…
/expertise/techniques/dry-soil-mixing
Wick drains / PVDs and earthquake drains
Technique
Wick drains / PVDs and earthquake drains Wick drains, also known as Prefabricated Vertical Drains (PVD) are prefabricated geotextile filter-wrapped plastic strips with moulded channels. These act as…
/expertise/techniques/wick-drains-pvds-and-earthquake-drains
Rigid inclusions
Technique
Rigid inclusions Rigid inclusions are a ground improvement method using high deformation modulus columns constructed through compressible soils to reduce settlement and increase bearing capacity.…
/expertise/techniques/rigid-inclusions
Dynamic compaction and replacement
Technique
Dynamic compaction and replacement Dynamic compaction involves the controlled impact of a crane hoisted weight, of between typically 10-30 tonnes, falling in a pre-determined grid pattern to improve…
/expertise/techniques/dynamic-compaction-and-replacement
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…
/expertise/techniques/rapid-impact-compaction-ric
Rock / fissure grouting
Technique
Rock / fissure grouting Rock grouting is normally done in fissured rock to reduce the flow of water along the joints and discontinuities in the rock. Rock fissure grouting Common uses Reduce…
/expertise/techniques/rock-fissure-grouting
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…
/expertise/techniques/compaction-grouting
Mine infill or cavity grouting
Technique
Mine infill or cavity grouting Mine or cavity grouting generally uses a low strength cement based grout to fill large natural or man- made voids. Cavity fill grouting Common uses Single or multi-seam…
/expertise/techniques/mine-infill-or-cavity-grouting
Driven precast piles
Technique
Driven precast piles Driven precast piles are deep foundation elements installed using impact or vibration hammers to a design depth or resistance. Keller have developed the design and manufacturing…
/expertise/techniques/driven-precast-piles
Franki piles
Technique
Franki piles Franki Piles, also known as enlarged based driven cast in-situ piles, are cast-in-place elements constructed using a drop weight (hammer) and temporary casing. They can provide high…
/expertise/techniques/franki-piles