Lateral earth pressure

About: Lateral earth pressure is a research topic. Over the lifetime, 5334 publications have been published within this topic receiving 62552 citations.

Effect of overburden pressure on liquefaction resistance of sand

Abstract: The effect of overburden pressure on liquefaction resistance of sand is studied and results of a site-specific investigation are presented. When estimating liquefaction resistance of sand from the ...

Soil arching over deeply buried thermoplastic pipe

Abstract: Soil arching associated with buried thermoplastic pipe is discussed. First, the soil arching phenomenon is described. Then two different approaches are mentioned from the literature to represent the degree of soil arching (or vertical arching factor). The elastic solutions of Burns and Richard are revisited to derive expressions for the vertical soil arching factor for buried pipe. Comparison of the elastic solutions and field soil pressure cell readings reveals the importance of incorporating a bending stiffness parameter. With this finding, the AASHTO method for calculating the load on buried pipe is evaluated against the elastic solutions. The analysis reveals that the AASHTO method is conservative, overestimating the load on thermoplastic pipe by up to 30%. Further evidence to support the finding is found within the strain gauge readings taken on the pipe walls in the field. Therefore, alternative equations derived directly from the elastic solutions are recommended to predict the load on buried therm...

Analysis of Arching in Soil-Passive State

Abstract: Arching involves stress transfer from yielding part of a soil to unyielding part of soil. Many authors considered arching action for active earth pressure. In this paper arching action is considered for passive earth pressure in noncohesive backfill. The backfill is assumed to move upward in a form of catenary arch due to arching. The value of θw (the angle of major principal plane) is calculated for soil-wall friction angle and soil friction angle. An expression for passive lateral stress ratio has been derived considering these angles. An illustrative example has been solved to show the effect on earth pressure distribution on retaining wall considering arching for different wall friction angles and soil friction angles. The applicability of proposed formulation is compared with model test results.

Recent findings about the confining effect of geogrids from large scale laboratory testing

Abstract: To investigate the contribution of geogrids to the strength of reinforced soil large scale labora- tory triaxial and plane strain testing has been carried out at RWTH Aachen University. The outcomes of the triaxial tests clearly show the development of an additional confining effect of the reinforcement. The contri- bution of this effect to the development of the horizontal earth pressure on the facing of reinforced retaining walls has then been investigated with plane strain model tests. The significant reduction of the earth pressure, that has been assumed and reported various times during the past two decades, could be confirmed with these tests. However, analysing displacements and rotations of the soil particles during retraction of the facing, the deve- lopment of shear zones within the reinforced soil body has been identified. The results clearly show an arch- ing effect of the soil between the stabilizing geogrid layers.