Study on the Failure Surface of Heterogeneous Soil at the Passive State
Study on the Failure Surface of Heterogeneous Soil at the Passive State Fei Song*, Rui-Zhi Cheng, Li-Qiu Ma, Xi-Bin Tang, Wen-Zhong Yuan Institute of Geotechnical Engineering, School of Highway Engineering, Chang’An University, Xi’an, 710064, P.R. China Guizhou Electricity Engineering Construction Supervise Company, Guiyang, 550005, P.R. China Guizhou Electric Power Design Institute and Research Institute, Guiyang, 550002, P.R. China songf1980@163.com
PASSIVE EARTH PRESSURES WITH VARIOUS WALL MOVEMENTS
This paper presents experimental data of earth pressure acting against a vertical rigid wall, which moved into a mass of dry sand with a stress‐free horizontal surface under various wall‐movement modes. To investigate the variation of earth pressure induced by the rotation about a point above the top (RTT) and rotation about a point below the wall base (RBT) types of wall movement, the instrumented retaining‐wall facility was developed at National Chiao Tung University. Based on experimental data it is found that, for a wall under translational movement, the passive pressure distribution is linear and in good agreement with Terzaghi's prediction based on the general wedge theory. For a wall under either RTT or RBT mode, the magnitude of passive thrust and its point of application are significantly affected by the mode of wall displacement. However, if the parameter n indicating location of the center of rotation is greater than 2.0, the influence of movementmode on passive earth pressure becomes less impo...
Extensions to the generalized method of slices for stability analysis
Extensions are suggested to the generalized method of slices that is commonly used in slope stability analysis. It is shown that restrictions exist on the assumptions used to make the problem statically determinate. In addition, a numerical procedure has been developed to find the bounds to the factor of safety, subject to additional requirements of physical admissibility. As a result of these developments it has been possible to produce a revised computer program that appears to overcome the problems of convergence experienced by other programs in current use. Results obtained with this new analysis confirm the reliability of several methods of analysis used in practice.