Process stability of high cut slope under complex geological conditions during construction

Abstract

A typical soil similar slope with abundant Quaternary groundwater is located in Chenzhou City, China and mainly composed of gray-white silt clay which softens in water. The landslide occurred during the first evaluation in the ratio of 1∶1.25, and then twice during the following reinforcement in the ratio of 1∶3. As a result, the scale of the landslide enlarged 20 times and the slope was still in low deformation. Based on the engineering geological conditions, the landslide character and the monitoring data, the evaluation model of slope's process stability was built by use of FEM, which simulated the course of the landslides. And then, the landslide mechanism was analyzed and key points of the following construction process control were put forward. The result shows Process stability of high cutting slope under complex geological conditions during the construction is a controllable procedure variable, lacking effective control is the main reason for the landslide. The method, consist of FEM simulation and monitoring is effective in researching slope's process stability during construction and the mechanism of landslide, meanwhile it also provided dynamic guidance for the excavation and reinforcement.