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. Keller rig performing…
/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
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
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
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…
/en/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…
/en/expertise/techniques/vibro-compaction
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…
/en/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…
/en/expertise/techniques/instrumentation-and-monitoring
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
Rigid inclusions
Technique
Rigid inclusions Rigid inclusions is a ground improvement method using high deformation modulus columns constructed through compressible soils to reduce settlement and increase bearing capacity.…
/en/expertise/techniques/rigid-inclusions
Mixed modulus columns CMM ®
Technique
Mixed modulus columns CMM ® Mixed modulus columns, also known as columns with Mixed Moduli, mixed columns or CMM® is a ground improvement method using high deformation modulus columns constructed…
/en/expertise/techniques/mixed-modulus-columns
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. Keller rig…
/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. Keller rig…
/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…
/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. Keller rig installing driven precast piles Common uses Can…
/en/expertise/techniques/driven-precast-piles
Ductile iron piles
Technique
Ductile iron piles Ductile piles are a deep foundation method using the displacement technique with prefabricated piles made of ductile cast iron available in 118 mm and 170 mm diameters with…
/en/expertise/techniques/ductile-iron-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 - open hole
Technique
Bored piles / drilled shafts - open hole Bored piles are a very effective, state-of-the-art construction element with many applications in foundation and civil engineering. Keller rig installing…
/en/expertise/techniques/bored-piles-drilled-shafts-open-hole
Bored piles / drilled shafts - cased
Technique
Bored piles / drilled shafts - cased Bored piles are a very effective, state-of-the-art construction element with many applications in foundation and civil engineering. Temporary and permeant steel…
/en/expertise/techniques/bored-piles-drilled-shafts-cased