1994 Volume 32 Issue 4 Pages 22-30
The methods of pile of cast in place hold the majority all methods in execution of pile, because of the characteristic of that methods. But the quality of concrete of piles of cast in place is worse than the quality of the general structures of concrete. So we reduce the compressive strength of concrete piles, when we design the piles of cast in place. But we don't clearly know how much and why the strength declines. This report have purpose which we estimate the decline of strength of piles.
