Cast in-situ Concrete Piles

There are two categories of concrete cast in-situ piles - driven and bored.

Driven Cast in-situ Piles

In this category of piles, a heavy sectioned metal tube, along with a detachable metal shoe at the bottom, is driven within the ground through a drop hammer or any other category of hammer up to the required depth. Thereafter reinforcement is placed, if needed, and concrete is filled within the tube and the tube concurrently withdrawn leaving the shoe at the bottom. In other version, a thin steel shell is driven along with the help of a mandrel, that is then withdrawn, reinforcement placed, if needed, and concreting done, the shell being left permanently within the ground.

Raymond concrete pile organization has established a thin steel shell pile, called as Raymond Pile. The casing pipes consist of either step tapered or uniformly tapered light corrugated steel tubes. An internal mandrel is used to drive the casing, the mandrel is then withdrawn and the shell filled along with concrete.

In Franki piles, a concrete plug is created at the bottom of the steel casing and through repeated hammering the pipe is thrust downwards within the ground. While the bearing stratum is reached, further concrete is poured and the plug hammered out of the tube to form a bulb end. So by that the reinforcement cage is lowered within the tube, concreted and the casing withdrawn.

Vibro pile uses a detachable steel or cast iron shoe along with a steel tube casing. With the help of a hammer, the tube along with the shoe on is driven to the needed depth, reinforcement cage lowered, concreting complete and the tube withdrawn leaving the shoe at the bottom of the pile. Simplex piles are also same to this sort of arrangement.