Bottom Driven Piling System

Using bottom driven piling has a number of distinct advantages:

• low noise and vibration
• no spoil is generated
• concreting in the dry in a single operation to a controllable level
• good axial and shear capacity
• minimal site preparation

Bottom driven piles can be installed successfully into most ground conditions including peats, soft clay and loose sand where some other techniques are inappropriate. Bottom driven piles are self-testing when driven to set. Permanent casing prevents any risk of concrete loss, thus ensuring pile integrity.

Bottom driven drop hammer piling technique

Close ended thin walled steel tubes are driven using a cylindrical drop hammer operating within the casing striking a dry mix concrete plug. The steel tubes are typically 2 to 3 metres in length and are joined by full fillet welding as installation proceeds. The bottom driven piles are installed to a predetermined set or depth depending on design criteria. Single bar or cage reinforcement is introduced and the bottom driven pile casings are filled using workable high strength concrete.

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