318国道通麦镇段某滑坡稳定性分析

Anti-landslide stability analysis for Tongmaizhen section of No.318 National Highway

针对318国道通麦镇段某滑坡问题,结合滑坡区的实际情况和地质条件,对滑坡进行了定性、定量评价,结果表明:滑坡区在正常工况下整体(第一级滑体)处于基本稳定状态,局部(第二级滑体)处于欠稳定状态;在非正常工况Ⅰ或地震作用下整体(第一级滑体)将处于欠稳定状态,局部(第二级滑体)处于滑移状态。建议:①在公路外侧下设置预应力锚索抗滑桩;②在滑坡前缘剪出口部位修筑防冲刷片石砼挡墙;③在坡体上植树造林或种植草甸植物等营造防护林措施。

Landslide had ever occurred at the Tongmaizhen section of No.318 National Highway. Combined with the actual situation and geological conditions of the landslide area, qualitative and quantitative appraisal was con- ducted for the landslide. The results of appraisal demonstrate that the landslide area is in basically stable state on the whole （lst-grade slide mass）, and in under-stable state locally （2nd-grade slide mass）under normal operating condition , in under-stable state on the whole （lst-grade slide mass） and in sliding state locally （2nd-grade slide mass） under abnormal operating condition Ⅰ or earthquake. The following measures are suggested： 1. Construct pre-stressed anchorage anti-slide piles at the external side of highway; 2. Construct anti-scouring rubble concrete retaining wall at the position of landslide frontal edge crossing exit; 3. Plant trees or grass on the slope.