里底水电站库区巴迪滑坡蓄水前后稳定性评价  

Stability Evaluation of Badi Landslide in the Reservoir Area of Lidi Hydropower Station before and after Water Storage

作　　者：叶欣玲 司富生[1] 胡华[1] 鲁蕊 YE Xinling;SI Fusheng;HU Hua;LU Rui(PowerChina Northwest Engineering Corporation Limited,Xi'an 710100,China;Chengdu University of Technology,Chengdu 610059,China)

机构地区：[1]中国电建集团西北勘测设计研究院有限公司,西安710100 [2]成都理工大学,成都610059

出　　处：《西北水电》2024年第2期19-25,共7页Northwest Hydropower

基　　金：国家自然科学基金(41907246).

摘　　要：针对澜沧江上游里底水电站库区右岸的巴迪滑坡,分析其成因机制为倾倒型蠕滑变形,利用极限平衡法计算水库蓄水前后滑坡稳定性。结果表明:水库蓄水前,滑坡整体各工况下均处于稳定状态;蓄水后,滑坡在天然及暴雨工况下整体仍为稳定状态,但暴雨及地震工况下滑坡体前缘稳定性较差。对该滑坡蓄水后进行设备监测得滑坡体地下水位上升、变形速率最大时段为水库蓄水后10个月里,此后呈蠕变状态。滑坡体破坏形式为前缘陡坡地段(高程1885.00~1900.00 m)片状塌岸,前缘部位整体下滑的可能性很小。Aiming at the Badi landslide on the right bank of Lidi Hydropower Station in the upper reaches of Lancang River,the formation mechanism is analyzed to be toppling creep deformation and the limit equilibrium method is used to calculate the stability of the landslide before and after the reservoir is impounded.The results show that before the reservoir impoundment,the whole landslide is in a stable state.After impoundment,the whole landslide is still stable under natural and rainstorm conditions,but under rainstorm and earthquake conditions,the stability of slope front edge is poor.The equipment monitoring of the landslide after water storage shows that:the maximum period of groundwater level rise and deformation rate of the landslide is within 10 months after the reservoir's water storage,and thereafter it shows a creep state.The failure model of the landslide is Flaky bank collapse in the steep slope section of the front edge(1885.00~1900.00 m);the possibility of overall sliding at the leading edge is very low.

关 键 词：成因机制 倾倒型蠕滑变形 极限平衡法 稳定性评价 

分 类 号：P642.22[天文地球—工程地质学] TV697.23[天文地球—地质矿产勘探]