降雨条件下公路节理边坡稳定性分析

结合某公路节理岩质边坡,采用离散单元法,考虑节理岩体应力与渗流耦合机理,对降雨条件下节理边坡稳定性进行分析。重点分析了边坡主应力分布和位移矢量图,节理张拉和剪切位移以及边坡渗流产生的空隙水压力。分析结果表明:节理边坡变形主要受优势节理面控制,产生平面滑移。节理张拉和剪切位移趋势与边坡变形规律是一致的,地下水流动产生空隙水压力会加剧边坡的变形趋势。

Stability of Highway Jointed Slope under Rainfall Condition

Combining with a highway slope in jointed rock mass,using the discrete element method and considering the coupling of stress and seepage in jointed rock mass,the slope stability under the rainfall condition is analyzed.The principal stress distribution and displacement vector of the slope,the tensile and shear displacement of joints,as well as the pore water pressures produced by slope seepage are analyzed with emphasis.The results show that the deformation of jointed slope is mainly controlled by preponderant joints surface,which brings planar slippage.The trend of tensile and shear displacement of joints are consistent with slope displacement,and the pore water pressures produced by flowing ground water could increase the deformation trend of slope.