THEORETICAL STUDY OF EARTH PRESSURE AT – REST FOR SANDY SOILS

Abstract

The solution of many foundations-engineering problems requires knowledge of the lateral pressure which may be exerted by the earth or surcharge loads. The lateral earth pressure is a significant design parameter in many of the foundation engineering problems subjected to lateral pressures commonly used as parts of many civil engineering projects. Some examples of these structures are, retaining walls, sheet-pile walls, both braced and unbraced excavations, trench excavations, grain pressures on silo walls, cofferdams, caissons, embedded shells and other types of underground structures requiring an estimation of the lateral pressure for design or stability analysis. The different formulae such as Jaky , Hendron , Brooker and Ireland, Vierzbiczky , Saglamer , Wenkow , Robert Szepeshazi , Matsuoka et al, Bolton , and others were used to determine the factor K o. The main aim of this research is to estimate the coefficient of earth pressure at rest equation depending on the theoretical relationship between the active, passive earth pressures and the lateral strain of soil. The important result from this research is:) sin 1 /() sin 1 (2 2 φ φ + − = o K The research included other important results.