Drilled shafts, also known as caissons, are typically high-capacity cast-in-place deep foundation elements constructed using an auger. A hole having the design diameter of planned shaft is first drilled to the design depth. If the hole requires assistance to remain open, casing or drilling fluid is used. Full-length reinforcing steel is then lowered into the hole and the hole is filled with concrete. The finished foundation element resists compressive, uplift and lateral loads. The technique has been used to support buildings, tanks, towers and bridges.
This technique is available in most areas through
either Hayward Baker or sister Keller companies.
Contact your local Hayward
Baker office for more information.