泥岩填料路基边坡稳定性的影响因素

Influencing factors of the stability of mudstone-filled road subgrade slopes

为增大泥岩等固废物在实际工程中的利用率,基于有限元软件COMSOL Multiphysics分析分别处于基本稳定状态、欠稳定状态、不稳定状态时,不同含水率、压实度下泥岩填料路基边坡的位移,研究边坡稳定性的影响因素。研究表明:泥岩填料边坡稳定性随含水率的增大而线性减小,随压实度的增大而缓慢增大;分析泥岩填料路基边坡处于基本稳定状态、欠稳定状态、不稳定状态时的极限水平位移,确定单应力场作用下泥岩填料路用性能阈值的变化规律,含水率和压实度对处于欠稳定状态、不稳定状态时的边坡影响较大,研究成果可为泥岩填料路基边坡稳定性预警提供监测依据。

In order to increase the utilization rate of solid waste such as mudstone in practical engineering,the finite element software COMSOL Multiphysics is used to analyze the displacement of mudstone-filled slope in different water content and compaction degrees under conditions of basic stability,under stability,and instability.The factors influencing the slope stability are studied.The research shows that the slope stability of mudstone-filled decreases linearly with increasing water content and increases slowly with increasing compaction degree.The ultimate horizontal displacement of the mudstone-filled slope in different stability states(basic stability,under stability,instability) is analyzed,and the variation of the threshold of road performance of mudstone fill under single stress field is determined.Water content and compaction degree have a greater impact on the slope in under stability and instability.This study can provide monitoring basis for stability warning of mudstone-filled slope.