Displacement piles are bored cast in situ deep foundation reinforcement elements constructed by advancing a specialty displacement tool into the ground using a rotary drilling rig.
- Support structures
Displacement piles are typically advanced into the ground to the target design depth using a specialty displacement tool installed with a high-capacity rotary drilling rig. Soil of equivalent volume to the displacement pile drilled is laterally displaced towards the bore walls and is densified.
Upon completion of the boring, the drilling rig and the displacement tool are gradually extracted while concrete is poured through the internal hollow pipe of the drill string. A steel reinforcement cage is typically lowered into the freshly placed concrete. This technique is suitable for various soil conditions such as sandy gravel, sand, silt, clay and organic soils and is widely used to support various structures.