石棉县某崩塌体稳定性分析与治理方案研究

Stability analysis and treatment plan study of a collapse body in Shimian county

四川省泸定县MS6.8级地震引发大量地质灾害。石棉县王岗乡挖角村后坡由地震引发花岗岩强风化层剥落、滑塌,造成岩土体裸露,并进一步演化形成危岩体6处。经计算,大部分危岩体在天然状态下处于基本稳定状态,在暴雨工况下处于欠稳定状态,在地震工况下处于欠稳定-不稳定状态。“9·5”泸定地震震后应急抢险工程中已在斜坡坡脚修建3段拦石墙。本次在有效治理灾害的基础上,兼顾生态修复问题。针对1^(#)危岩带斜坡采取“削坡+格构+植生袋绿化”的治理方式;对危岩带坡脚堆积体采用草藤搭配治理方法;对挡土墙采用藤本植物爬墙绿化方案。

The MS6.8 magnitude earthquake in Luding County,Sichuan Province has caused a large number of geological disasters.The back slope of Wajiao Village,Wanggang Township,Shimian County was caused by the earthquake to cause the strong weathered layer of granite to peel off and collapse,the rock and soil was exposed,and further evolving into six dangerous rock bodies.According to the calculation,most dangerous rock bodies are basically stable under natural conditions,under rainstorm conditions are understable,and under earthquake conditions are unstable.Due to the emergency rescue project after the“9·5”Luding earthquake,three stone retaining walls have been built at the foot of the slope.On the basis of effective disaster management,ecological restoration issues are also taken into account.The treatment method of“slope cutting,lattice structure,and planting bags for greening”has been adopted for the slope of the 1^(#)dangerous rock zone.The accumulation at the foot of the dangerous rock slope is treated using a combination of grass and vines.The retaining wall adopts a vine climbing greening plan.