Generalized Analysis of Under-Reamed Pile Subjected to Anisotropic Swelling Pressure

Abstract

Many pioneering foundation techniques have been suggested for plummeting the unfavorable heave of foundations placed in expansive clays. This paper presents another innovative technique of the determination of load creating a specified amount of settlement and load which maintains no uplift/no settlement. In the present study a slip layer of varying thickness is introduced along the pile periphery and depth of swelling zone, intensity of anisotropic swelling pressure are varied and stress based analysis is conducted and load creating a known amount of settlement and load which maintains no uplift/no settlement are found out. It is accomplished that (a) Increase in expansive zone increases, load required for known amounts of settlement increases for a given slip element thickness, bulb diameter and swelling pressure (b) The soil heave and pile uplift are immensely affected by the intensity of anisotropic swelling pressure intensity. (c) Provision of slip element below the pile tip reduces the pile upheaval.