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

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.

作 者： DENG Jianhui WEI Jinbing MIN Hong L.G. Tham C.F. Lee   作者單位： DENG Jianhui,WEI Jinbing,MIN Hong(Key Laboratory of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China)

L.G. Tham,C.F. Lee(Department of Civil Engineering, University of Hong Kong, Hong Kong, China) 

刊 名： 中國科學E輯（英文版）  SCI 英文刊名： SCIENCE IN CHINA SERIES E(TECHNOLOGICAL SCIENCES)  年，卷(期)： 2005 48(z1)  分類號： P5  關鍵詞： reservoir filling   old landslide   monitoring system   water level   deformation  

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