顺层岩质斜坡溃曲破坏机理的力学分析

Mechanical Analysis for Failure Mechanisms of Buckling of Consequent Rock Slopes

分析顺层岩质斜坡的溃曲破坏模式,建立力学模型,运用梁板理论分析斜坡滑移弯曲变形破坏的机理。计算挠曲曲线的理论解,得出岩质斜坡发生溃曲破坏的临界坡长。以某桥基斜坡为工程实例,计算斜坡在天然、暴雨、暴雨+地震3种工况下的临界坡长,发现雨水和地震对斜坡临界长度有较大的影响。研究对深入理解该类斜坡的变形破坏具有参考价值。

This paper analyzes failure modes of buckling of consequent rock slopes,establishes mechanical model and analyzes failure mechanisms of sliding and bending deformation of slopes by means of beam and plate theory.The paper calculates theoretical solutions of flexure curve and obtains critical length of rock slopes with buckling failure.With some bridge foundation slope as a project example,the paper calculates critical length of the slope under three working conditions,i.e.nature,storm and storm＋earthquake,and finds out rainwater and earthquake have great influence on critical length of the slope.The results of research in this paper offer a reference value for deeply understanding deformation failure of such slopes.