Our history
Content page
Our history Keller has grown from humble beginnings to become the largest geotechnical specialist contractor in the world. It all began in 1860 when Johann Keller founded his company. Many years of…
/about-us/our-history
Re-levelling structures
Solution
Re-levelling structures Subsidence, the gradual downward movement of a building or structure, can result in damage to buildings.  Keller can apply re-levelling techniques to bring buildings back to…
/expertise/solutions/re-levelling-structures
Employment practices
Content page
Employment practices Our people are our most valuable asset. We are committed to creating a work environment and culture that brings out their best and keeps Keller a great place to work. Equal…
/how-we-work/employment-practices
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…
/expertise/techniques/wick-pvds-band-drains
Earthquake drains
Technique
Earthquake drains The earthquake drain ground improvement method minimises bearing capacity failures and settlement during and immediately after a seismic event.  It mitigates liquefaction by…
/expertise/techniques/earthquake-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.…
/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…
/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…
/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…
/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 illustration Common uses…
/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
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…
/expertise/techniques/cavity-bulk-mine-fill-grouting
Polyurethane grouting
Technique
Polyurethane grouting Polyurethane grouting involves the injection of expanding polyurethane to fill and seal cracks and voids and re-level slabs. Polyurethane grouting illustration Common uses…
/expertise/techniques/polyurethane-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
Franki piles
Technique
Franki piles Franki piles, also known as pressure injected footings (PIFS), are high-capacity, cast-in-place elements constructed using a drop weight and casing. Franki piles illustration Common uses…
/expertise/techniques/franki-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…
/expertise/techniques/ductile-iron-piles
Helical / screw piles
Technique
Helical / screw piles Helical piles, also known as screw piles, are constructed using steel shafts with helical flights (helix/helices) of various sizes to suit the site specific ground conditions.…
/expertise/techniques/helical-screw-piles
Macropiles
Technique
Macropiles A macropile® is an ultra-high capacity micropile, with high strength grout, steel reinforcement, and increased diameter over 300mm. Macropile illustration Common uses Provide structural…
/expertise/techniques/macropiles
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
Shotcrete
Technique
Shotcrete Shotcrete can be used to create a natural-looking surface covering sculptured, textured or stained while wet to blend in with the environment.  Shotcrete illustration Common uses…
/expertise/techniques/shotcrete