【Daily Topic】【Engineering Version 20160527】

A. Rigid limit analysis B. Finite element simulation C. Probabilistic analysis of slope stability

ABC~~~~~~~~~~~~

The mechanical checking method and the engineering geology method are two commonly used approaches for analyzing and checking the stability of roadbed slopes. 1. Mechanical verification method: (1) The numerical solution method assumes several different sliding surfaces; the principle of mechanical equilibrium is applied to verify each of these surfaces, in order to identify the most dangerous one. The stability of the slope is then determined based on the stability level of this most dangerous sliding surface. This method provides relatively accurate results, but the calculation is complicated. (2) The graphical or tabular method involves, based on graphical representation and calculations, conducting analytical studies to develop charts for use in verifying slope stability. To simplify the calculation process. 2. Engineering geology method: This involves analyzing the types of soil and their conditions based on stable natural slopes or existing man-made slopes. By comparing the engineering geological conditions, reference data showing stable values similar to those of roadbed slopes are established, which serve as a basis for determining the values for roadbed slopes. The design of slopes made of ordinary soil generally involves using mechanical analysis methods for verification, along with engineering geological approaches for validation; whereas slopes composed of rock or gravelly soil are primarily designed using engineering geological methods. 3. Basic assumptions of the mechanical solution method: The sliding soil wedge is homogeneous and isotropic; the sliding plane passes through the foot of the slope; the stress distribution within the sliding soil is not considered, nor are the interaction forces between various soil strips (referring to the strip method). 1. For slope foundations of sandy soils that are loose due to the linear sliding surface method, they have strong water permeability and low cohesion; the stability of such slopes relies mainly on their internal friction force.