三淅高速灵卢段山体滑坡稳定性评价及治理措施研究

Study on Landslide Stability Evaluation and Control Measures in Linglu Section of Sanxi Expressway

鉴于目前缺乏对于高速公路滑坡的多点立体监测研究,文章以三淅高速灵卢段山体滑坡为典型工程案例,对该滑坡进行稳定性分析及提出防治措施加固建议,并建立多点变形监测系统对该滑坡进行全面监测,分析其时空演化过程。结果表明:在大尺度影响下,滑体局部和大范围滑动,形成明显的位移带,必须及时采取工程控制措施;在对滑坡进行稳定性分析后,运用挡土墙、抗滑桩、锚索和排水等防治方案进行加固。根据多点监测系统对滑坡进行监测,据此对治理效果进行了评价,证明防治方案能有效控制滑坡变形;监测过程中较长的逐渐稳定期可分为缓慢变形阶段、处理阶段和处理稳定阶段。防治工程建成后,必须继续监测,直至总变形日趋稳定。

Since there is less study on multi-point three-dimensional monitoring of expressway landslide currently,the landslide in Linglu Section of Sanxi Expressway is adopted as a typical project case,the landslide stability is analyzed,preventive measures and reinforcement suggestions are proposed.A multi-point deformation monitoring system is established for comprehensive monitoring of the landslide.Its space-time evolution process is analyzed.The results show that the slip mass slides locally and in a large range under the influence of large scale,thereby forming a obvious displacement zone.Engineering control measures must be taken in time.After the stability of the landslide is analyzed,prevention and control schemes are adopted for reinforcement such as retaining wall,slide-resistant pile,anchor cable,drainage,etc.The landslide is monitored through the multi-point monitoring system.The treatment effect is evaluated accordingly.It is proved that the control scheme can effectively control the landslide deformation.The long gradual stabilization period can be divided into slow deformation stage,treatment stage and treatment stabilization stage during the monitoring process.The project must be monitored continuously until the total deformation becomes stable after the prevention and control projects are completed.