Study on the Stability of Bearing Load Slope under Earthquake Based on Quasi-Static Force Method

Quasi-static method originated from the safety evaluation of structural engineering under earthquake. Compared with the time history analysis method, quasi-static calculation is simple and quick, and gradually applied in the analysis of slope stability. This article combined quasi-static method with three-dimensional finite difference method (FLAC3D), and applied it in the seismic stability study of a slope. The slope has a convex shape. Two tunnel anchorages and four bridge foundations built in central of it bearing bridge load, so it is a typical bearing slope. This article put forward a numerical calculation failure criterion to the slop of this type by calculating and analyzing the stress, displacement and plastic zone distribution characteristics when it under earthquake, and gave out the slopes seismic safety coefficient. The research results of this paper can provide a useful reference for the similar projects.