Driven piles are installed using a drop hammer or vibro rig. A standard pile is installed using a drill head that applies torque to the auger; driven piles are installed using the bottom driven method. Energy is delivered to the steel case bottom shoe using a drop hammer rig.
Diameter: 100mm – 350mm.
Ground Condition: contaminated unstable ground, high groundwater, peat, soft clay, loose sand.
Cost effective as they are quick and easy to install.
Maintains shape and integrity in wet ground conditions.
Low noise and vibration.
Driven piles aren’t susceptible to damage from the installation of other piles.
No excess spoil to remove.
A method of driving piles into the ground with impact to install the pile to design. The casings are a thin wall of steel tube and a shoe attached to the base, lengths vary from 2m – 3m. Pile integrity can be ensured when permanent casings are used as any risk of concrete loss is prevented.
Drop hammer rigs have a cylindrical shape drop weight that is used within the casing. As the weight drops down the tube and impacts on the bottom shoe, the ground compacts and the case is driven further into the ground. Tubes are welded together to achieve greater depths.
The weight is withdrawn for a single bar or cage to be placed within the pile for added reinforcement. The pile casings are filled with high strength and left to set.