Wet soil mixing, or the deep mixing method, improves the characteristics of weak soils by mechanically mixing them with cementitious binder slurry.
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.
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.
Compensation grouting, or fracture grouting, is the injection of a cement slurry grout, hydrofracturing soil, and creating lenses. The lenses compact the surrounding soil and lift the overlying soil and structures.
The micropile slide stabilization system (MS3) consists of an array of micropiles, working in tension and compression, that connect as a system using a structurally reinforced grade beam to stop slide movements.
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 flights.
Permeation grouting (cement grouting, chemical grouting, or pressure grouting) fills cracks or voids in soil and rock, permeating granular soils with flowable grouts to create a cemented mass.
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 1930s that has been used on thousands of projects since.
Vibro piers® (also known as aggregate piers) are stiff aggregate piers constructed to reinforce fine-grained soils. Our company founder, Johann Keller, developed this technique, which has been used on thousands of projects since.
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 create soilcrete.
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 out of soft compressible soil so it consolidates faster, often from decades to months.
The earthquake drain ground improvement method minimizes bearing capacity failures and settlement during and immediately after a seismic event. It mitigates liquefaction by limiting excess pore pressures generated during seismic events to levels less than those that could trigger liquefaction.…
Rigid inclusions (RIs) are high modulus/controlled stiffness grout columns typically installed through weak, highly compressible soils to reduce settlement and increase bearing capacity.
Dynamic compaction uses the energy from a falling weight in a pre-determined grid pattern to improve granular soils and fills.
Rapid impact compaction densifies shallow, granular soils using a hydraulic hammer, which repeatedly strikes an impact plate on the ground surface.
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 in the rock. Occasionally, cement grouts are injected into the void space within coarse granular soils.
Low mobility (compaction) grouting involves the injection of a low-slump mortar grout to densify loose, granular soils and stabilize subsurface voids or sinkholes.
Polyurethane grouting involves injecting expanding polyurethane to fill and seal cracks, voids, and re-level slabs.
Driven piles are deep foundation elements installed using impact or vibration hammers to a design depth or resistance.
Franki piles, or pressure-injected footings (PIFS), are high-capacity, cast-in-place elements constructed using a drop weight and casing.
