三峡库区巴东某高切坡稳定性分析及治理

Stability Analysis and Mitigation of a High Cut Slope in Badong County,Three Gorges Reservoir Area

由于三峡库区移民建设的开展,城镇建设形成一系列的高切坡,给居民生命财产安全带来较大的威胁。高切坡防护是地质灾害防治工作的重要组成部分,也是关系到三峡移民长治久安的大事。以位于巴东县的一处高切坡为例,探讨了高边(切)坡稳定性影响因素,采用极限平衡法及工程地质类比法等分析方法对其稳定性进行了计算分析和预测评价,并提出了"清坡+挂网喷锚工程+截排水设施+坡面绿化"的工程治理方案。

A number of high cut slopes are formed due to the construction of relocation community of the immigrants from the pool area of Three--Gorges Reservoir. Some of these high cut slopes might have a potential safety hazard to the life and properties of the residents. The safety of these slopes is of an integral part of the geological hazard preventions and is also a critical portion of the prolonged safety issue for the relocation communities. This paper presents a case history of the evaluation of a high cut slope. Factors that affecting the stability of the slope are discussed and the safety of the slope are evaluated by the limit equilibrium method and geological engineering analog method. The mitigation of measure utilizes a comprehensive method： the combination of flatten slope with shotcrete on the wire meshes; mortar stacked masonry retaining wall; cut--off ditch at the crest of the slope.