Helical (screw) piles
Technique
Helical (screw) piles Helical piles, also known as helical piers or screw piles, are constructed using steel shafts with helical flights of various sizes to suit site-specific ground conditions.…
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Macropiles®
Technique
Macropiles® A macropile® is an ultra-high-capacity micropile typically drilled in place. Macropile technique illustration Common uses Provide structural support Process Typically, a steel pipe is…
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Micropiles
Technique
Micropiles Micropiles (mini piles, pin piles, needle piles, and root piles) are deep foundation elements constructed using high-strength, small-diameter steel casing and/or threaded bars. Micropiles…
/expertise/techniques/micropiles
Sculpted shotcrete
Technique
Sculpted shotcrete Shotcrete can create a natural-looking surface covering sculptured, textured, or stained while wet to blend in with the environment. Sculpted shotcrete technique illustration…
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Drilled shafts
Technique
Drilled shafts Drilled shafts are high-capacity deep foundation systems, also known as drilled piers, caissons, bored piles, or cast-in-drilled-hole piles (CIDH). Drilled shafts technique…
/expertise/techniques/drilled-shafts
Secant or tangent (contiguous) piles
Technique
Secant or tangent (contiguous) piles Secant or tangent piles are columns constructed adjacent (tangent) or overlapping (secant) to form structural or cutoff walls. From soil mixing to drilled shafts…
/expertise/techniques/secant-tangent-piles
Vibro concrete columns
Technique
Vibro concrete columns Vibro concrete columns involve constructing concrete columns with a bottom-feed, down-hole vibratory probe to transfer loads through weak strata to a firm underlying stratum.…
/expertise/techniques/vibro-concrete-columns
Injection systems
Technique
Injection systems Injection systems involve injecting aqueous solutions into the ground to treat expansive, collapsible, and desiccated clay and railroad subgrade mud pockets. Injection systems…
/expertise/techniques/injection-systems
Vibro stone columns (vibro replacement)
Technique
Vibro stone columns (vibro replacement) Vibro stone columns, or vibro replacement, are the construction of dense aggregate columns (stone columns) with a down-hole vibrator suspended from a crane or…
/expertise/techniques/vibro-stone-columns
Displacement CFA piles
Technique
Displacement CFA piles Keller delivers practiced displacement piling construction services. Displacement CFA piles technique illustration Common uses Structural support Ground improvement Process…
/expertise/techniques/displacement-cfa-piles
Load bearing elements (barrettes)
Technique
Load bearing elements (barrettes) Load bearing elements (LBE), or barrettes, refers to using single or multiple arrangements of rectangular elements to support significant structural loads for…
/expertise/techniques/load-bearing-elements
Cutter soil mixing (CSM)
Technique
Cutter soil mixing (CSM) Cutter Soil Mixing (CSM) enhances the engineering properties of soils and reinforces soil masses by mechanically mixing the in situ soils with a binder slurry, typically…
/expertise/techniques/cutter-soil-mixing-csm
Dewatering
Technique
Dewatering Construction dewatering, the temporary lowering of the groundwater, has been practiced by Keller for more than 90 years, and we are recognized as the industry's preeminent dewatering…
/expertise/techniques/dewatering
Ground freezing
Technique
Ground freezing Artificial ground freezing converts in situ pore water to ice through the circulation of a chilled liquid via a system of small-diameter pipes placed in drilled holes. Ground freezing…
/expertise/techniques/ground-freezing
Pit underpinning
Technique
Pit underpinning Pit underpinning stabilizes structures before adjacent excavation using concrete and mortar. Pit underderpinning illustration Common uses Underpin foundations Process A limited-width…
/expertise/techniques/pit-underpinning
Slab jacking
Technique
Slab jacking Slab jacking raises concrete slabs and fills underlying voids using the controlled injection of Portland cement grout. Slab jacking illustration Common uses Relevel slabs Fill voids…
/expertise/techniques/slab-jacking
Jacked in piles
Technique
Jacked in piles Jacked in piles or piers are constructed using small-diameter steel pipes advanced to bearing depth by hydraulic jacks secured to the existing structure being underpinned. Jacked in…
/expertise/techniques/jacked-piles
Access / drop shafts
Technique
Access / drop shafts Drop shafts and vent shafts provide access or ventilation into a large-diameter, horizontally bored tunnel through bedrock. Access / drop shafts icon Common uses Combined Sewer…
/expertise/techniques/access-drop-shafts
Tremie bottom seals
Technique
Tremie bottom seals Keller installs either tremie seals or soil mixing underneath water basements and structures. We cater to the most cost-effective alternative for our clients. Tremie bottom seals…
/expertise/techniques/tremie-bottom-seals
Tangent Bearing Elements (TBEs)
Technique
Tangent Bearing Elements (TBEs) Keller is equipped to provide cost-effective, fast installation with reduced excavation and dewatering with Tangent Bearing Elements (TBEs), a more practical…
/expertise/techniques/tangent-bearing-elements