长河坝水电站高边坡开挖扰动及支护效应研究  

Study of Excavation Disturbance and Supporting Effects of Left Abutment Slope of Changheba Hydropower Station

作　　者：张正虎[1] 邓建辉[1] 魏进兵[1] 裴建良[1] 胡金山[2] 

机构地区：[1]四川大学水利水电学院水力学与山区河流开发保护国家重点实验室,四川成都610065 [2]中国水电顾问集团成都勘测设计研究院有限公司,四川成都610072

出　　处：《人民黄河》2014年第9期120-123,126,共5页Yellow River

基　　金："十二五"国家科技支撑计划项目(2012BAK10B07-02);国家自然科学基金资助项目(51079093)

摘　　要：通过对开挖、支护等施工过程的详尽数值模拟,深入分析了长河坝水电站左坝肩边坡的开挖扰动特征及支护效应,得出该岩石高边坡岩体变形、应力及塑性屈服区的开挖扰动及支护效应,并和监测成果相对比,进一步验证所得结论的合理性。采用分步开挖并逐级锚固支护的方案对边坡的加固作用明显。锚固支护除了可以约束岩体的变形,还可以降低边坡岩体的卸荷强度。对类似的西南岩质高边坡开挖支护提出了若干建议。Based on the detailed numerical simulation of excavation and supporting processes,the excavation disturbance characteristics and sup-porting effects of left abutment slope of Changheba Hydropower Station were further analyzed. The excavation disturbance and supporting effects of deformation,stresses and plastic yield zones of high rock slope were concluded. The rationality of the following results had been further verified through comparing with monitoring results. There was an obvious reinforcement effect for slope through the timely supporting scheme continuously after the excavation steps. In addition to the constraint of rock mass deformation,anchorage support could also reduce the unloading strength of slope. Some suggestions were made to similar high rock slopes during the excavation and supporting in southwest China.

关 键 词：岩石高边坡 开挖扰动 支护效应 数值模拟 监测成果 长河坝水电站 

分 类 号：TV642[水利工程—水利水电工程] P642.2[天文地球—工程地质学]