Rotary bored piles

1. THe methods of installation of replacement piles have largerly been superseded by the introduction of continuous flight auger , or grout injection piling .
2. This method is highly efficient with exceptionally fast installation possible .
3. A continuous auger of the required length is mounted on a mobile rig and is used to excavate the pile void
4. THe central shaft of the auger is hollow , and is connected to a concrete pumping system , which allow the concrete to be placed as the auger is withdrawn
5. Hence there is no need to provide temporarry support to the sides of the excavation
6. Once the auger is withdwawn , a steel reinforcement cage is forced into the concrete from above
7. THus , the pile is formed quickly and efficiently with little disturbance to surrounding areas

Continuous flight auger

ENd-bearing and friction piles

THis method by which the pile transfer its load to the ground depends upon;

1. The design of the pile
2. The nature of the ground in which it is located

End-bearing and Friction piles

The method by which the pile transfer its load to the ground depends upon ;

End bearing piles acts by passing through unsuitable strata to bear directly upon soil with adequate bearing capactiy

Friction piles are supported by the effects of friction from the ground to the sides of the pile throughtout its length

In practise , all piles derive their support from a combination of these factors