山地填方高边坡数值分析优化设计

Numerical Analysis and Optimal Design of High Slope Filled in Mountain Area

高填方边坡在山地工程建设中占据较大的比例,支护方式对于高填方边坡变形和稳定性控制极为重要。数值分析是边坡支护方案优化的有效方式,本文采用Midas GTS/NX有限元软件,对重庆某填方边坡的支护方向进行数值分析。研究结果表明:对于超高填土边坡采用悬臂式桩板挡墙不能控制边坡位移,在此基础上增加预应力锚索能有效地降低边坡位移,但稳定性系数不满足要求。最后,采用桩板墙 + 预应力锚索 +坡脚注浆的方式不仅能有效控制边坡位移,而且还显著提高边坡稳定性。该研究结果对于山地填方边坡的变形控制和稳定性分析具有较大的参考意义。

The high fill slope occupies a large proportion in the mountain engineering construction, and the supporting method is very important for the deformation and stability control of the high fill slope. Numerical analysis is an effective way to optimize the slope support scheme. In this paper, Midas GTS/NX finite element software is used to conduct numerical analysis on the supporting direction of a filling slope in Chongqing rail transit. The results show that the cantilever pile plate retaining wall cannot control the slope displacement, and the pre-stressed anchor cable can effectively reduce the slope displacement, but the stability coefficient does not meet the requirements. Finally, the method of pile wall, pre-stressed anchor cable and grouting at the foot of slope can not only effectively control the slope displacement, but also significantly improve the stability of the slope. The results of this study have great reference significance for deformation control and stability analysis of mountain slope.