黄土路堑高边坡稳定性及土钉支护研究

摘要

以山西省临离高速公路第三合同段K70＋465为工程依托，应用岩土工程有限元软件分析了黄土路堑高边坡的稳定性。结果表明，边坡在天然状态下整体稳定性满足规范要求，但在降雨工况下存在局部破坏的可能性，需要对局部坍塌区域进行加固，工程建议采用混凝土面板加土钉支护的方法。据有限元强度折减法得出支护后边坡的局部安全系数明显提高，支护后的边坡处于稳定状态。%Based on contract section III of highway from Lin County to Lishi K70+465 in Shanxi Prov-ince,the stability of loess cutting high slope is analyzed by finite element software.Result shows that under natural situation the overall stability of slope can satisfy the demand of the code,however under rainfall condition the slope has the possibility of partial failure.Therefore,it is necessary to reinforce the partial collapse area;in this paper the strengthening method of soil nails with concrete panels is recommended.According to the strength reduction FEM,the local safety factor of supported slope is significantly improved and the slope remains stable.