Shaft Resistance of Model Pile in Wet Soil

The shaft resistance of smooth and rough model pile in wet sand, silt and clay under static loading is investigated experimentally in a pile-soil shaft resistance test apparatus. This apparatus allows independent control of the boundary stresses of a cylindrical soil specimen in the vertical and horizontal directions. The pile installation technique used was designed to minimize soil disturbance so that the failure criterion for pile shaft friction could be investigated. The load transfer along the shafts of smooth and rough surfaces aluminum model piles in wet soil under static load was measured. The study shows that, the magnitude of pile-displacement at failure, which necessary to mobilize the ultimate shaft resistance varies significantly with the soil type and surface roughness of the pile. The study also, shows the importance of the boundary conditions of the soil specimen surrounding the model pile. The results shows the effectiveness of using rough pile in increasing the pile capacity. Also, The results show that the angle of the pile-soil contact depends on the soil type, roughness of the pile surface, void ratio, initial density, and horizontal confining pressure.