funderingsputs

Funderingsputs refers to a geotechnical remediation technique used to stabilize or strengthen a building's foundation by injecting cementitious grout under or around the foundation. The method aims to fill voids, densify loose soil, and transfer loads more effectively to deeper, more stable layers, thereby reducing settlement and improving bearing capacity.

The process typically involves drilling boreholes from outside the building footprint or through the foundation itself, then pumping grout under controlled pressure into the surrounding soil. The injected grout can form continuous columns, zones, or a grid-like pattern, creating a rigid support structure beneath the foundation. Different grout mixes and injection strategies are chosen depending on soil conditions, the degree of settlement, and the desired outcome. Common approaches include conventional cementitious grout injections and compaction or undercutting techniques that encourage soil density gains around the foundation.

Funderingsputs are used in various situations, such as historical or structural settlements, voids beneath foundations, settlement-related cracking, or when adjacent excavations require ground improvement. They may be part of underpinning strategies or serve as a method for preventing further movement without extensive reconstruction.

Materials used are usually cementitious grouts, sometimes with admixtures to control viscosity, set time, or flow characteristics. The work is performed by qualified geotechnical contractors under appropriate supervision, with quality control measures that monitor injection pressures, grout consistency, and subsequent settlement or tilt. The term is commonly translated as foundation grout injections or grout underpinning in English, and it is governed by national and European geotechnical standards and best practices.