COMPARISON OF SKIN FRICTION OF PILE IN AXIAL DIRECTION FROM PULL OUT AND IN TORSIONAL DIRECTION FROM TORSION TEST

Abstract

Skyscraper buildings, Bridges, Flyovers play a key role in urban approach and regeneration. These massive structures have mainly pile foundation. Pile foundation carry combinations of vertical, torsional and lateral forces. Vertical force on pile due to its own weight of structure. Lateral force on pile due to horizontal movement of soil. Torsional force on pile due to wind action and unusual force act on edge of structure that tends to rotate a body around its axis.

There is no specification for torsional force acting on pile in IS 2911 Part-4.Torsional force factors should be added in IS 2911. Skin friction on pile play a key role in pile foundation. Skin friction factor resist the moment of pile against torsion and uplift forces.

Therefore, objectives of this work are:

• Mechanism of applying load for pull out test. • Mechanism of applying torque for torsion test on piles.

A mechanism of applying load for pull out test at different length of pile. At different length skin friction factor from pull out is nearly equal. There is also a mechanism of applying torque for torsional test on pile at different length. Skin friction factor is also find out in torsional test. Through pile pull out mechanism and torsional mechanism we are trying to find out a relation of skin friction factor.