中等倾角顺层边坡地下开挖失稳模式研究  

Study on failure model of slope excavation with medium dip angle

作　　者：谭捍华 李宗鸿 彭澍 薛彦雨 袁维 Tan Hanhua;Li Zonghong;Peng Shu;Xue Yanyu;Yuan Wei(Guizhou Zhi an Traffic Engineering Monitoring and Testing Center Co.,Ltd.,Guiyang 550000,China;Civil Engineering College,Shijiazhuang Railway University,Shijiazhuang 050043,China;China Railway 18th Bureau Group Municipal Engineering Co.,Ltd.,Tianjin 100855,China;Rail Transit Branch of China Railway 24th Bureau Group Co.,Ltd.,Shanghai 200071,China)

机构地区：[1]贵州省质安交通工程监控检测中心有限责任公司,贵阳550000 [2]石家庄铁道大学,土木工程学院,石家庄050043 [3]中铁十八局集团市政工程有限公司,天津100855 [4]中铁二十四局集团有限公司轨道交通分公司,上海200071

出　　处：《工程勘察》2020年第5期6-10,共5页Geotechnical Investigation & Surveying

基　　金：河北省自然科学基金青年科学基金项目(2018210046);贵州省科技支撑计划(黔科合支撑〔2019〕2883);国家自然科学基金青年基金项目(51709176)。

摘　　要：研究地下开挖条件下中等倾角顺层岩质边坡的失稳模式,可为相似地形的边坡防护设计提供依据。通过UDEC数值模拟和相似模型试验分析边坡开挖后的位移数据,揭示了地下开挖条件下中等倾角顺层边坡的变形特征。结果表明:开挖区近坡顶侧的岩体所受开挖影响较大,开挖区上方岩体塌落导致坡表塌陷,并带动后方坡体产生顺层滑移。其失稳模式为坍塌-滑坡破坏,工程人员应在开挖工程中对开挖区顶部进行喷浆支护并对后方坡体进行锚杆支护防止灾害产生。The study of the failure model of the moderately inclined bedding rock slope under the condition of underground excavation could provide a basis for the slope protection design.The displacement after underground excavation is analyzed by UDEC numerical simulation program and similar model test,and the deformation characteristics of mid-dip bedding slope under the condition of underground excavation are revealed.The results show that the rock mass near the top of the slope in the excavation area is greatly affected by the excavation,and the rock mass above the excavation area collapse causes the slope surface subside,and bedding slip occurred in the rear slope.The failure model is defined as collapse-landslide.Shotcrete protection for the top of the excavation area and rock bolts support for the rear slope should be applied in the excavation project to prevent disasters occur.

关 键 词：中等倾角 顺层边坡 地下开挖 失稳模式 

分 类 号：TU42[建筑科学—岩土工程]