深路堑段公路改扩建边坡稳定性分析及支护研究

Study on slope stability analysis and support of highway reconstruction and extension in deep cutting section

针对公路改扩建过程中路堑段边坡的稳定性问题,基于豫西地区某公路改扩建工程,对其路堑边坡的失稳机理进行了分析,采用Soilworks软件根据现场实际情况建立了边坡计算模型,对开挖前、开挖过程中和施加支护后的路堑边坡稳定性进行模拟计算。结果表明:边坡开挖工程中,其应力分布、滑动面的变化存在一定的规律性,开挖过程中应加强边坡的位移监测;对于高边坡,通过对最下一级边坡进行工程加固,效果较好、成本较低。

In view of the stability of the cutting slope in the process of expressway reconstruction and expansion,based on an expressway reconstruction and expansion project in western Henan, the instability mechanism of the cutting slope is analyzed, and the slope calculation model is established by using Soilworks software according to the actual situation on site to simulate the stability of the cutting slope before excavation, during excavation and after support. The results show that the stress distribution and dangerous sliding surface will change continuously during the excavation of slope, and the displacement monitoring of slope should be strengthened during the excavation process. For high slopes, the effect is better and the cost is lower by strengthening the lowest slope.