COMPARISON OF SIDE RESISTANCE OF STEEL PILE FROM PULL OUT TEST VS TORSION TEST

Abstract

Extensive megaprojects held on worldwide with whatever land present lead the construction industry to introduce advanced deep foundation system with latest equipment and installation process. Among this pile being one; is used to transfer the load coming from the superstructure to a deeper stratum. The mechanism of load transfer being complex, piles generally have the capacity to resist the load coming either through end bearing, skin friction or both. Piles are normally subjected to axial compressive loads, inclined loads and uplift loads. In addition to these piles may be subjected to torsional stress due to an eccentricity of the applied loads. In a condition where putting the pile to a hard stratum is uneconomical or a difficult task floating or friction piles are used. These piles are designed in such a way that the shaft interacting with the soil (skin friction) playing the key role. Skin friction factors resist the moment of pile against torsion and uplift forces. These project attempt to investigate the skin friction of a mild steel pile when its subjected to uplift(pull out) force and torsional load at different depth in a sand bed.