Wet soil mixing
Technique
Wet soil mixing Wet soil mixing, or the deep mixing method, improves the characteristics of weak soils by mechanically mixing them with cementitious binder slurry. Wet soil mixing technique…
/expertise/techniques/wet-soil-mixing
TRD - Soil mix walls
Technique
TRD - Soil mix walls Trench cutting and remixing deep (TRD) soil mix walls are mixed in place using a specialized vertical cutter post mounted on a base crawler machine. TRD soil mix walls technique…
/expertise/techniques/trd-soil-mix-walls
Soil nailing
Technique
Soil nailing Soil nailing uses grouted, tension-resisting steel elements (nails) to reinforce in situ soils and create a gravity retaining wall for permanent or temporary excavation support. Soil…
/expertise/techniques/soil-nailing
Compensation (fracture) grouting
Technique
Compensation (fracture) grouting Compensation grouting, or fracture grouting, is the injection of a cement slurry grout, hydrofracturing soil, and creating lenses. The lenses compact the surrounding…
/expertise/techniques/compensation-grouting
Micropile slide stabilization system (MS3)
Technique
Micropile slide stabilization system (MS3) The micropile slide stabilization system (MS3) consists of an array of micropiles, working in tension and compression, that connect as a system using a…
/expertise/techniques/ms3
CFA (auger cast) / ACIP piles
Technique
CFA (auger cast) / ACIP piles CFA / ACIP piles (continuous flight auger piles, auger cast piles, or augered cast-in-place piles) are cast-in-place piles using a hollow stem auger with continuous…
/expertise/techniques/cfa-auger-cast-acip
Permeation (chemical) grouting
Technique
Permeation (chemical) grouting Permeation grouting (cement grouting, chemical grouting, or pressure grouting) fills cracks or voids in soil and rock, permeating granular soils with flowable grouts to…
/expertise/techniques/permeation-chemical-grouting
Vibro compaction
Technique
Vibro compaction Vibro compaction is a ground improvement technique that densifies clean, cohesionless granular soils with a downhole vibrator. It is a technique first developed by Keller in the…
/expertise/techniques/vibro-compaction
Vibro (aggregate) piers®
Technique
Vibro (aggregate) piers® Vibro piers® (also known as aggregate piers) are stiff aggregate piers constructed to reinforce fine-grained soils. Our company founder, Johann Keller, developed this…
/expertise/techniques/vibro-aggregate-piers
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 a dry cementitious binder to…
/expertise/techniques/dry-soil-mixing
Wick (PVD) drains
Technique
Wick (PVD) drains Wick drains, or prefabricated vertical drains (PVD), are prefabricated geotextile filter-wrapped plastic strips with molded channels. These act as drainage paths to take pore water…
/expertise/techniques/wick-drains
Earthquake drains
Technique
Earthquake drains The earthquake drain ground improvement method minimizes bearing capacity failures and settlement during and immediately after a seismic event. It mitigates liquefaction by limiting…
/expertise/techniques/earthquake-drains
Rigid inclusions
Technique
Rigid inclusions Rigid inclusions (RIs) are high modulus/controlled stiffness grout columns typically installed through weak, highly compressible soils to reduce settlement and increase bearing…
/expertise/techniques/rigid-inclusions
Dynamic compaction
Technique
Dynamic compaction Dynamic compaction uses the energy from a falling weight in a pre-determined grid pattern to improve granular soils and fills. Dynamic compaction technique illustration Common uses…
/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
High mobility (cement slurry) grouting
Technique
High mobility (cement slurry) grouting High mobility (cement slurry) grouting, or cement or rock grouting, is usually done in fissured rock to reduce water flow along the joints and discontinuities…
/expertise/techniques/high-mobility-grouting
Low mobility (compaction) grouting
Technique
Low mobility (compaction) grouting Low mobility (compaction) grouting involves the injection of a low-slump mortar grout to densify loose, granular soils and stabilize subsurface voids or sinkholes.…
/expertise/techniques/low-mobility-grouting
Polyurethane grouting
Technique
Polyurethane grouting Polyurethane grouting involves injecting expanding polyurethane to fill and seal cracks, voids, and re-level slabs. Polyurethane grouting technique illustration Common uses Fill…
/expertise/techniques/polyurethane-grouting
Driven piles
Technique
Driven piles Driven piles are deep foundation elements installed using impact or vibration hammers to a design depth or resistance. Driven piles technique illustration Common uses Structural support…
/expertise/techniques/driven-piles
Franki piles (PIFs)
Technique
Franki piles (PIFs) Franki piles, or pressure-injected footings (PIFS), are high-capacity, cast-in-place elements constructed using a drop weight and casing. Franki piles PIFs technique image Common…
/expertise/techniques/franki-piles-pifs