泥岩层公路边坡稳定性评价

Roadway Slope Stability Assessment in Mudstone Layers

指出了新疆天山是一个地震活跃的地区,且公路某些边坡会受到低强度泥岩的影响。为确保泥岩下的公路边坡安全,对边坡稳定性进行了数值评估,分析了物理力学性质和坡角对边坡安全系数的影响。通过对不同角度的斜坡的灵敏度分析,认为斜坡的稳定性对泥岩的内聚力比对材料密度和内部摩擦角更敏感。分别在静力条件和地震条件下,总结了不同坡角和内聚力作用下的安全系数(FS),绘制了安全系数等高线图来表示稳定边界,并对静力条件和地震条件进行了比较。

The Tianshan area of Xinjiang is an earthquake-stricken area,and some slopes of the road will be affected by low-intensity mudstone.To ensure the safety of the road slope under the mudstone,the slope stability was numerically evaluated.The effects of physical and mechanical properties and slope angle on the safety factor of the slope are analyzed.Regarding the physico-mechanical properties,the stability of the slope is more sensitive to the cohesion of the mudstone than to the material density and internal friction angle by sensitivity analysis of slopes at different angles.The safety factor(FS)under different slope angles and cohesion is summarized under static and seismic conditions.A safety factor contour map is drawn to to represent the stability boundary and the static and seismic conditions are compared.