Foundation strengthening and repair methods (Underpinning)

Underpinning methods do not treat the soil, but instead treat an existing foundation, either by modifying or repairing the foundation or by making additions or connections to a foundation. It is done in order to improve the foundation’s load carrying capacity, and transmitting foundation loads to an adequately strong soil layer. So, for existing structures, […]

Various ground improvement techniques

Without being too detailed, we will now list ground improvement and foundation improvement /repair techniques other than grouting and compaction below. Injection Systems: various aqueous solutions are injected into the ground, for treatment of collapsible and expansive soils, railroad subgrades, certain slopes. Rigid Inclusions: involves transferring of loads from weak to firm soil by using […]

Soil Compaction Methods

Compaction is reducing the soil volume, to make it denser and stronger and also less permeable. Compaction of soils can be done by heavy construction equipment, that use different methods to compact the soil. One method is to keep dropping a heavy weight from a certain height, over the entire intended foundation area. So to […]

Grouting Methods

There are different methods for grouting, and together they make up for a considerable part of ground improvement and/or existing foundation strengthening methods overall. A particle or chemical based grout usually with additives is injected into the soil with different placement techniques. The additives include lime, portland cement, fly ash, bitumen or their combinations. Grouting […]