Deep foundations shift loads through weak, compressible soils to underlying capable soils or rock.

Common Uses

  • Support loads

Deep foundations are structural elements that are driven into the ground and typically made up of timber, steel, or concrete. They can also be built in the ground by drilling an open or cased hole that is then filled with reinforced concrete. These elements are generally attached to a structure and can be installed prior to construction of a building or used as underpinning elements for present structures. The load is transferred to the bearing layer of ground through end bearing and/or side friction. This technique can be used in combination with grouting techniques to either construct or improve the load transfer element.