Stability analysis of slope supported by frame with pre-stressed anchors under earthquake
Abstract：Under the situation of considering the anchor prestress effects on stability of loess slope,according to the damage of the sliding surface,stability model of slope supported by frame with pre-stressed anchors under earthquake was established.By the method of lumped-mass explicit finite element,the soil was separated into soil-static-dynamic micro-unit and soil-prestressed micro-unit discretely,and the corresponding discrete element dynamic equilibrium equation was established,the displacement response and the stress field in sliding surface of the supporting slope were deduceed.Based on the displacement response and the soil stress field,a calculation method of stability safety factor for slope supported by frame with pre-stressed anchors under earthquake was proposed.A project example was analyzed by using the method proposed in this paper,the result was compared with the one of the quasi-static method.Comparison results show that the method proposed in this paper for the homogeneous loess slope is feasible,the earthquake reaction of the supporting loess slope and the dynamic performance of the soil can be showed primely compared with pseudo-static method.
Keywords：frame with pre-stressed anchorssupporting slopeseismic actionsoil-static-dynamic micro-unitsoil-prestressed micro-unitstability
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 1994-1998 )