Excavation support
Solution
Excavation support During construction it is often necessary to form a stable excavation and to ensure that any associated movement will not damage neighbouring structures or utilities. Keller Polska…
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Marine structures
Solution
Marine structures Keller Polska offers a full range of services for the marine construction market. This includes the design and construction of new ports, jetties and quays as well as the extension…
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Wet soil mixing
Technique
Wet soil mixing Wet soil mixing, also known as the deep mixing method, improves the characteristics of weak soils by mechanically mixing them with cementitious binder slurry. wet-soil-mixing Common…
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Mass mixing
Technique
Mass mixing Mass Soil Mixing (MSM), or mass stabilisation, is a ground improvement technique that improves soft or loose soils, by mechanically mixing them with either wet grout or dry cementitious…
/en/expertise/techniques/mass-mixing
Soil nails
Technique
Soil nails Soil nailing uses grouted, tension-resisting steel elements (nails) to reinforce in situ soils and creating a gravity retaining wall for permanent or temporary excavation support. Soil…
/en/expertise/techniques/soil-nails
Compensation/fracture grouting
Technique
Compensation/fracture grouting Compensation or fracture grouting is the injection of a cement slurry grout into the soil creating and filling fractures that then lift the overlying soil and…
/en/expertise/techniques/compensation-fracture-grouting
Download
Keller a glance
Resource
Keller a glance Keller at a glance Infosheet Facts and figures about Keller Group Download
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Driven cast in-situ piles
Technique
Driven cast in-situ piles Driven cast in-situ (DCIS) piles are constructed by driving a closed-ended hollow steel or concrete casing into the ground and then filling it with concrete. Driven cast in-…
/en/expertise/techniques/driven-cast-situ-piles
How we work
Landing page
How we work Keller Foundation logo KELLER Foundation Keller has set up a charitable foundation to support colleagues and their families affected by the conflict in Ukraine. Keller has set up a…
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Commercial
Market
Commercial Keller provides geotechnical solutions for the commerical market sector for both existing and planned structures, including office buildings, hotels, distribution centres, retail, data…
/en/expertise/markets/commercial
CFA piles (auger cast)
Technique
CFA piles (auger cast) Continuous flight auger (CFA) piles are a type of bored cast-in-place replacement pile. Piles are drilled and concreted in one continuous operation enabling much faster…
/en/expertise/techniques/cfa-piles-auger-cast
Vibro compaction
Technique
Vibro compaction 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…
/en/expertise/techniques/vibro-compaction
Vibro stone and concrete columns
Technique
Vibro stone and concrete columns This technique involves construction of loadbearing columns made from gravel or crushed stones with a vibrator to reinforce all soils in the treatment zone and…
/en/expertise/techniques/vibro-stone-and-concrete-columns
Design and build
Content page
Design and build Keller Polska’s broad product portfolio means our engineers have more options when it comes to an effective and efficient designs for our clients. Following fundamental geotechnical…
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Our history
Content page
Our history Johann Keller 1860 Johann Keller established a Keller company in Renchen, southern Germany. 1995 Opening of the Keller Polska office in Gdynia 15.02.1996 Keller Polska memorandum of…
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Re-levelling structures
Solution
Re-levelling structures Subsidence, the gradual downward movement of a building or structure, can result in damage to buildings. Keller Polska can apply re-levelling techniques to bring buildings…
/en/expertise/solutions/re-levelling-structures
Our work environment
Content page
Our work environment Our people are our most valuable asset. We are committed to creating a work environment and culture that brings out their best and keeps Keller Polska a great place to work.…
/en/careers/our-work-environment
Wick / PVDs / band drains
Technique
Wick / PVDs / band drains Wick drains, also known as Prefabricated Vertical Drains (PVD) are prefabricated geotextile filter-wrapped plastic strips with molded channels. These act as drainage paths…
/en/expertise/techniques/wick-pvds-band-drains
Dynamic compaction
Technique
Dynamic compaction Dynamic compaction involves the controlled impact of a crane hoisted weight, of around 10-30 tonnes, falling in a pre-determined grid pattern to improve loose, granular soils and…
/en/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…
/en/expertise/techniques/rapid-impact-compaction-ric