Keller is equipped to provide cost-effective, fast installation with reduced excavation and dewatering with Tangent Bearing Elements (TBEs), a more practical alternative to CFA piles, ACIP piles, large bored piles, caissons, shafts and/or barrettes.
Slab jacking raises concrete slabs and fills underlying voids, using the controlled injection of Portland cement grout.
Polyurethane grouting involves the injection of expanding polyurethane to fill and seal cracks and voids and relevel slabs.
Injection systems involve the injection of aqueous solutions into the ground to treat expansive, collapsible, and desiccated clay and railroad subgrade mud pockets.
Rapid impact compaction densifies shallow, granular soils, using a hydraulic hammer, which repeatedly strikes an impact plate on the ground surface.
Trench cutting and remixing deep (TRD) soil mix walls are mixed-in-place using a specialised vertical cutter post mounted on a base crawler machine.
This technique involves construction of concrete columns with a bottom-feed, down-hole vibratory probe to transfer loads through weak strata to a firm underlying stratum.
Franki piles, also known as pressure injected footings (PIFS), are high-capacity, cast-in-place elements constructed using a drop weight and casing.
Jacked in piles or piers are constructed using small-diameter steel pipes advanced to bearing depth by hydraulic jacks that are secured to the existing structure being underpinned.
Load Bearing Elements (LBE), also known as Barrettes, is a term that refers to the use of single or a multiple arrangement of rectangular elements to support significant structural loads for structures.
Shotcrete can be used to create a natural-looking surface covering sculptured, textured or stained while wet to blend in with the environment.
Keller installs either tremie seals or soil mixing underneath water basements and structures. We cater to the most cost-effective alternative for our clients.
Drop shafts and vent shafts are a common means of providing access or ventilation into a large diameter, horizontally bored tunnel through bedrock.
Cutter Soil Mixing (CSM) enhances the engineering properties of soils, and/or reinforces soil masses by mechanically mixing the in situ soils with a binder slurry, typically comprising either cement or bentonite slurry, or a combination of the two.
Construction dewatering, the temporary lowering of the groundwater, has been practiced by Keller for more than 90 years and the company is recognized as the industry's preeminent dewatering contractor and an innovator in the field.
Anchor block slope stabilization remediates slopes or existing retaining walls, using anchored reaction blocks.
Vibro compaction is a ground improvement technique that densifies clean, cohesionless granular soils with a downhole vibrator. It’s a technique first developed by Keller in the 1930s that we’ve used on thousands of projects since.