Piling foundations in Johannesburg

READ MORE ABOUT Piling foundations IN Johannesburg :

What is piling?
Deep foundations are sometimes indicated by geotechnical engineers when soil conditions are poor or a heavy design load needs to be carried.

Piling makes deep foundations possible. Piles are commonly made from reinforced concrete and steel
Auger Piles
Standard auger piling is the most commonly used pile and is best suited to partially saturated cohesive and residual soils. The piles are installed by means of drilling with an auger rig.

Drilling is carried out by rotation of the drilling head and lowering of the auger allowing it to penetrate into the soil. Once the auger flight is full with soil it is withdrawn and spun off. This procedure is repeated until the desired depth is reached.

Once the drilled hole has been completed, a reinforcing cage is lowered down into position. The shaft is then filled with concrete and is vibrated to assist compaction of the liquid concrete.
Continuous Flight Auger (CFA)
Standard auger piling is the most commonly used pile and is best suited to partially saturated cohesive and residual soils. The piles are installed by means of drilling with an auger rig.

Drilling is carried out by rotation of the drilling head and lowering of the auger allowing it to penetrate into the soil. Once the auger flight is full with soil it is withdrawn and spun off. This procedure is repeated until the desired depth is reached.

Once the drilled hole has been completed, a reinforcing cage is lowered down into position. The shaft is then filled with concrete and is vibrated to assist compaction of the liquid concrete.