Load Bearing Piles
1. Cast iron piles. Cast iron piles are hollow tubes of cast iron having inner diameter 20 to 40 cm and wall thickness 20 to 30 mm. These are generally 4 metres in length and for longer lengths these are joined by a suitable device. Cast iron being a brittle material, these piles are provided with helical screws at the lower end and the whole assembly is rotated to drive the pile inside the soil. Piles with helical screws are generally known as screw piles. Cast iron piles are suitable for shallow foundations and are suitably employed for the foundations of marine structures, light weight bridges and buoys anchors. 2. Cement concrete piles These are of the following types : A. Cast-in-situ piles These piles are cast with cement concrete at the place where these have to carry superimposed load. For casting the pile, a hole is driven by excavating with an Auger or driving a casing. The hole is then filled up with cement concrete...
