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.

Reinforced earth retaining walls

Abstract: In a discussion of this paper, participants observe that model tests carried out by the authors appeared to partially substantiate the lateral earth pressure the theory used to postulate failure modes and develop analysis and design equations. This theory for computing lateral pressures is based on the existence of a "plastic wedge" which is assumed to develop behind retaining structures and, as such, the concept is essentially an ultimate strength concept. The discussants express reservations with respect to the applicability of this theory and the applicability of the model tests for the prediction of the behavior of full-scale reinforced earth walls. Alternative failure mode, an alternate conceptual approach for describing the behavior of reinforced earth by representing it by an equivalent "composite material" with associated orthotropic "composite properties", and the composite continuim concept are discussed. The Rankine method for computing tension in the strip is also discussed. In a second discussion, the need is expressed for additional information on the influence of the length of ties on the breaking failure height. The mechanical behavior of reinforced earth walls is reviewed and the discussant observes that reinforced earth walls provide a good example of the difference between the potential failure line defined by the equations of statics and the actual failure line, obeying equations of kinematics. A third discussion covers the aspect of tension in the ties and questions the theory underlying the authors methods.

Active earth pressure of retaining wall considering wall movement

Abstract: The coulomb’s limit equilibrium theory is employed for the active earth pressure calculation of retaining wall considering translational wall movement. It is considered that the earth pressure against the back of the wall is due to the thrust exerted by a wedge of soil between the wall and a plane passing through the heel of the wall. The soil–wall friction angle and internal soil friction angle are obtained via the simulation of the unloading triaxial test. The basic equations are established by considering the force equilibrium of a partial soil wedge. The lateral earth pressure coefficient is achieved through the moment equilibrium of the whole soil wedge. Comparisons illustrating the accuracy of the proposed approach are made with solutions available in the literature.

Pseudo-dynamic evaluation of passive response on the back of a retaining wall supporting c-Φ backfill

Abstract: The study presents a rational analytical approach to obtain the seismic passive response of an inclined retaining wall backfilled with horizontal c-Φ soil. Pseudo-dynamic analysis is carried out to obtain the seismic passive response. Here in this analysis, the critical wedge angle is a single one irrespective of weight, surcharge and cohesion and this fact satisfies the field situation in a more realistic manner. A planer failure surface is considered in the analysis. The effect of soil and wall friction angle, wall inclination, horizontal and vertical earthquake acceleration on the passive resistance and the variation of passive earth pressure along the height of the wall have been explored. A comparison to pseudo-static and other available methods have been made to highlight the non-linearity of seismic passive earth pressure distribution.

Pressure Coefficient in Dam-Break Flows of Dry Granular Matter

Abstract: The propagation of dry granular flows, such as rock and snow avalanches, can be described by depth-averaged models Different from classical shallow-water equations, these models take into account the anisotropy of normal stresses inside the flowing pile through using an earth pressure coefficient in the pressure term A new regularization function for calculating the pressure coefficient in the Savage-Hutter-type models at the early stages of dam-break flows and collapses is proposed In such circumstances the flow lines are significantly curved with respect to the basal surface and a special treatment of the earth-pressure coefficient is required for obtaining a satisfactory agreement with experimental data The comparison between numerical simulations and laboratory experimental data shows an apparent improvement in describing the early stages of dam-break waves over rough beds The comparison with experiments over smooth bed surface exhibits minor evidence of improvement Nonetheless, in this