Response of an old landslide to reservoir filling: A case history

查看全文 作　　者：L.G. [1]Tham;C.F. [1]Lee 机构地区：[1]Department of Civil Engineering, University of Hong Kong, Hong Kong, China 出　　处：《Science China(Technological Sciences)》索引2005年第48卷第z1期,共6页 基　　金：This work was supported by the Natonal Natural Science Foundation of China(Grant No.50279051);the Special Fund for Major State Basic Research Project(Grant No.2002CB412702);the Research Grant Council of Hong Kong. 摘　　要：Unfavorable hydrodynamic evolution is considered as the major cause leading to reservoir slope instability and is often modeled by numerical method. However, this simulation is seldom checked by systematic field instrumentation. Taking the opportunity of filling the Three Gorges Reservoir, a system was established in Xietan landslide to monitor reservoir water level, subground water level, seepage pressure, rainfall and deformation, etc. The monitored data during reservoir filling shows that: (1) The water level rise in the bank lags behind the reservoir filling and the lag time depends on the bank permeability; (2) rainfall-induced subground water rise and its lag time is closely correlated to hourly rainfall, indicating that it is not feasible or sufficient to use daily rainfall for analysis; (3) the effect of inverse seepage during reservoir filling on stability is ephemeral and reservoir filling is the major cause leading to bank instability. 关 键 词：RESERVOIR filling, OLD landslide, monitoring system, water level, deformation.