Shaft resistance of piles in rock
Shaft resistance of piles in rock
(OP)
Hi all,
I have a query regarding the design of piles in rock. How would I quantify the shaft resistance of a R.C. pile embedded in rock? I am particularily interested in a situation where the pile end bearing alone would not be enough to safely transfer the design load and therefore shaft resistance would need to be utilized.
Thanks in advance...
I have a query regarding the design of piles in rock. How would I quantify the shaft resistance of a R.C. pile embedded in rock? I am particularily interested in a situation where the pile end bearing alone would not be enough to safely transfer the design load and therefore shaft resistance would need to be utilized.
Thanks in advance...






RE: Shaft resistance of piles in rock
RE: Shaft resistance of piles in rock
If the budget allows and the project scope warrants, an Osterberg load test could/should be done to verify and value engineer the shafts.
RE: Shaft resistance of piles in rock
RE: Shaft resistance of piles in rock
Ground-5m, made ground
5m-8m, Stiff clay, C=80kN/m²
below 8m,Rock, allowable bearing pressure of 1000kN/m²
Service load to be applied to pile is about 1300kN. I think a 900mm dia pile would have capacity of 636kN solely from end bearing only. Can the toe of the pile be under-reamed to increase the end bearing area? If a 1300mm dia bulb at the pile toe was achieved then the end bearing capacity would be 1327kN.
Maybe all this is unneccesary and the shaft resistance will provide the additional capacity required???
RE: Shaft resistance of piles in rock
BA