Support of excavation
Solution
Support of excavation During construction, it is often necessary to form a stable excavation to ensure that any associated movement will not damage neighboring structures or utilities. Keller offers…
/expertise/solutions/support-of-excavation
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
How we work
Landing page
How we work man in yellow jacket with keller logo on the back Code of conduct Our business code of conduct sets out the principles and standards of behavior we expect from all our employees. Our…
/how-we-work
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
Commercial
Market
Commercial Keller provides geotechnical solutions for the commercial market sector, including office buildings, hotels, distribution centers, retail, data centers, and other structures. Commercial…
/expertise/markets/commercial
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
Design and build
Content page
Design and build Keller’s broad product portfolio means our engineers have more options to provide efficient solutions for our clients. Design build icon Following the fundamental geotechnical theory…
/expertise/design-and-build
Releveling structures
Solution
Releveling structures Subsidence, the gradual downward movement of a building or structure, can damage buildings. Keller can apply releveling techniques to bring buildings back to their correct…
/expertise/solutions/releveling-structures
Career paths
Content page
Career paths Two employees talking to a student College recruiting Develop your career from the start. Come visit us at a career fair and speak with one of our representatives about how your…
/careers/career-paths
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