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…
/expertise/techniques/wet-soil-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…
/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-…
/expertise/techniques/driven-cast-in-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…
/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 with a vibrator to reinforce all soils in the treatment zone and densify surrounding…
/expertise/techniques/vibro-stone-columns
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…
/expertise/techniques/instrumentation-and-monitoring
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…
/expertise/techniques/dry-soil-mixing
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
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
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…
/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…
/expertise/techniques/micropiles
Bored piles
Technique
Bored piles Bored piles are a very effective, state-of-the-art construction element with many applications in foundation and civil engineering. Bored piles illustration Common uses As heavy…
/expertise/techniques/bored-piles
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. Jetty construction…
/expertise/techniques/jetty-construction
Jet grouting
Technique
Jet grouting Jet Grouting uses high velocity fluid jets to construct cemented soil of varying geometries in the ground.  Jet grouting illustration Common uses Often the preferred solution in any…
/expertise/techniques/jet-grouting
Anchors
Technique
Anchors Ground anchors transfer tensile loads and consist of an anchor head, a free length and a bond length. The free length enables the anchor to be, a big advantage for excavation pits with very…
/expertise/techniques/anchors
Contiguous piles
Technique
Contiguous piles Contiguous pile walls consist of piles arranged in a way that a gap remains between the piles. Where required the soil between the piles can be stabilised during excavation by either…
/expertise/techniques/contiguous-piles
Diaphragm walls and barrettes
Technique
Diaphragm walls and barrettes With this technique, vertical panels are excavated under stabilising slurries using mechanical/hydraulic clamshell grabs or hydromill cutters to form a continuous cut-…
/expertise/techniques/diaphragm-walls-and-barrettes