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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 binder.

Jet grouting uses high velocity fluid jets to construct cemented soil, or Soilcrete, of varying geometries in the ground.

Ground anchors transfer tensile loads, using high strength steel bars or steel strand tendons. They consist of an anchor head, a free length and a bond length. We design and construct anchors as a stand-alone technique or as part of a turnkey earth retention or tie down solution.

Soldier piled walls are a form of embedded retaining wall that are used to retain the soil behind to allow the ground level in front of the wall to be lowered, the retained height can be increased with the use of propping or anchoring.

Slurry walls are constructed using either cement-bentonite or soil-bentonite based slurries to produce an in ground low permeability barrier.

Sheet piling retains soil, using steel sheets with interlocking edges and is applied using both vibratory and vibration-free installation rigs.

Wet soil mixing, also known as deep soil mixing, improves the characteristics of weak soils by mechanically mixing them with a cementitious binder slurry.

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 excavation support.

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 overlying soil and structures.

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 piles to large diameter steel cassions to support your project.

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 conditions.

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 ideally suited to installation in unstable soil conditions and urban environments.

Permeation grouting, also known as cement grouting or pressure grouting, permeates coarse, granular soils with flowable particulate grouts to create a cemented mass.

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 that we’ve used on thousands of projects since.

Wick drains, also known as Prefabricated Vertical Drains (PVD) are prefabricated geotextile filter-wrapped plastic strips with moulded channels. These act as drainage paths to take pore water out of soft compressible soil so it consolidates faster, often from decades to months.

Rigid inclusions are a ground improvement method using high deformation modulus columns constructed through compressible soils to reduce settlement and increase bearing capacity.