公路滑坡稳定性分析及治理方案设计

Stability Analysis and Treatment Scheme Design of Highway Landslide

为确保公路滑坡的安全,文中结合某滑坡所处地质条件,先通过传递系数法开展稳定性分析,再结合分析结果进行治理方案设计;最后,以滑坡变形数据为基础,通过变形预测手段探讨滑坡治理效果。结果表明,根据传递系数法的稳定性评价结果,某滑坡在不利工况条件下的稳定性相对较弱,属欠稳定状态,具有失稳风险,开展治理设计十分必要。结合工程实际,该滑坡防治方案总体设计为“挡土墙+锚杆格构”,经计算,两类支护措施均满足规范要求。探讨变形预测的滑坡治理效果,得到滑坡变形趋于收敛,3个监测点的最终变形预测值均小于25 mm变形控制值,充分验证了该滑坡防治处理手段的合理性,为类似工程积累了相关经验。

To ensure the safety of highway landslides,this article combines the geological conditions of a landslide and conducts stability analysis using the transfer coefficient method.Then,based on the analysis results,a treatment plan is designed;Finally,based on landslide deformation data,the effectiveness of landslide treatment is explored through deformation prediction methods.The analysis results indicate that according to the stability evaluation results of the transfer coefficient method,the stability of a certain landslide is relatively weak under adverse working conditions,belonging to an unstable state with instability risk.Therefore,it is necessary to carry out governance design.Based on engineering practice,the overall design of the landslide prevention and control plan is"retaining wall+anchor rod lattice structure".After calculation,both types of support measures meet the requirements of the specifications.Exploring the effectiveness of landslide control through deformation prediction,it was found that the deformation of the landslide tends to converge,and the final deformation prediction values of the three monitoring points are all less than the control value of 25 mm,fully verifying the rationality of the landslide prevention and treatment method and accumulating relevant experience for similar projects.