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
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
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
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
Interlocking pipe piles
Technique
Interlocking pipe piles Interlocking pipe piles consist of tightly interlocked pipe piles using an innovative mechanical “ball-and-socket” type connector welded to the full length of the pipe to…
/expertise/techniques/interlocking-pipe-piles
Cased CFA piles
Technique
Cased CFA piles The cased CFA pile is a continuous pile drilling and installation technique with low noise and no vibration. It is ideal for excavations requiring shoring systems abutting existing…
/expertise/techniques/cased-cfa-piles
Groundwater treatment
Technique
Groundwater treatment Groundwater or construction water encountered at job sites is often contaminated and must be processed before being discharged to local surface waters, storm sewers, or sanitary…
/expertise/techniques/groundwater-treatment
Mixed modulus columns CMM®
Technique
Mixed modulus columns CMM® Mixed modulus columns (columns with Mixed Moduli, mixed columns, or CMM®) is a ground improvement method using high deformation modulus columns constructed through…
/expertise/techniques/mixed-modulus-columns
Mass soil mixing
Technique
Mass soil mixing Mass soil mixing (MSM), mass mixing, or mass stabilization, is a ground improvement technique that improves soft or loose soils, by mechanically mixing them with either wet grout or…
/expertise/techniques/mass-soil-mixing
Anchors
Technique
Anchors Anchors transfer loads using grouted thread bars or strand tendons connected to a structure and bonding into stable soil or rock. Anchors technique illustration Common uses Excavation support…
/expertise/techniques/anchors
Anchor block slope stabilization
Technique
Anchor block slope stabilization Anchor block slope stabilization remediates slopes or existing retaining walls using anchored reaction blocks. Anchor block slope stabilization illustration Common…
/expertise/techniques/anchor-block-slope-stabilization
Soldier piles and lagging
Technique
Soldier piles and lagging Soldier piles and lagging retains soil, using vertical steel piles with horizontal lagging. Whether an open or low headroom site, Keller has the equipment and experience to…
/expertise/techniques/soldier-piles-lagging
Slurry cutoff walls
Technique
Slurry cutoff walls Slurry walls create barriers to groundwater inflow or subsurface contaminants. Slurry cutoff walls technique illustration Common uses Create barriers to groundwater flow…
/expertise/techniques/slurry-cutoff-walls