G318公路坛子岩村滑坡稳定性分析及治理方案研究

Analysis on Stability and Study on Treatment Measures of Landslide in Tanziyan Village of G318 Highway

由于突发性罕见降雨,位于巴东县境内G318公路K1421+500处的边坡发生滑塌。道路外侧挡墙及墙外山坡浅表层土体整体滑移至坡脚的冲沟内,严重影响行车安全。通过对滑坡段进行地质勘探及监测,运用北京理正软件进行稳定性分析,得出该边坡工程在天然工况下安全系数为1.085~1.396,暴雨工况下安全系数为1.013~1.102。为避免发生进一步滑塌,需要对该边坡进行防护治理。经综合对比分析,选定桩板墙+局部护面墙+综合引排水作为治理方案,经后期监测表明治理方案效果显著。

A landslide occurred at the K1421+500 of G318 highway in Badong county due to sudden and rare rainfall. The lateral retaining wall and the shallow surface soil of the slope outside the wall slip into the gully at the foot of the slope, which seriously affects the traffic safety. Through geological exploration and monitoring of the landslide section and stability analysis with Beijing Lizheng software, it is concluded that the safety factor of the slope project is 1.085~1.396 under natural working conditions and 1.013~1.102 under heavy rain conditions. In order to avoid further collapse, it is necessary to protect and treat the slope. After comprehensive comparison and analysis, pile-slab wall+local facing wall+comprehensive drainage is selected as the treatment scheme, which has a significant effect showed by the monitoring afterwards.