Abstract

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Title:: Stability Analysis of Slopes and Retaining Walls Based on Acceleration

Author(s):: JIE Yu-xin; BAI Yong-liang; ZHANG Bin; 1. State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China; 2. School of Engineering and Technology, China University of Geosciences, Beijing 100083, China

Keywords:: slope; retaining wall; acceleration; angular acceleration; inertial force; safety factor; soil pressure; slice method

Abstract:: Like the minimum safety factor, the indices based on acceleration, such as the maximum acceleration, maximum inertial force and maximum angular acceleration, can also be employed to evaluate the stability of slopes. In fact, they provide the probability to review the stability and instability of slopes from another point of view. This approach can also be extended to studying the soil pressure of retaining walls. Numerical results show that it is the same for the acceleration, inertial force and angular acceleration calculated based on the assumptions of Sweden slice method and simplified Bishop method, respectively, which imply that they are not sensitive to the assumption of forces between slices; the angular acceleration relative to the barycenter of the slip mass can not be independently used to evaluate the stability of slopes; for the soil pressure of retaining wall, due to the external bracing force changes the stress state of slices, the maximum inertial force is not consistent with the soil pressure either in magnitude or in direction; with the different strength parameters of soils, the maximum inertial force may be greater, or less than the soil pressure of retaining wall; analogously, it will be more reasonable to compute the imbalance thrust force of retaining structures by introducing its direction in advance.