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Geological Engineering: Proceedings of the 1st International Conference (ICGE 2007)

Baosong Ma
Baosong Ma
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The water level will periodically fluctuate between 145 and 175m since normal water level storage in Three Gorges Reservoir• it is significant to study the influence of water level fluctuation on the bank landslide stability. Use finite element method and water seepage fields to simulate with the water level fluctuation between 145 and 175m. The transient pore water pressures are used for limit equilibrium analyses of landslides considering the effects of suction on shear strength of unsaturated soils. It is discussed that the bank landslide stability in impounding and drawdown of Three Gorges Reservoir water level. The result shows that the stability coefficient increases gradually in general along with reservoir water level rising and the stability coefficient decreases gradually in general along with drawdown of reservoir water level. The stability coefficient with reservoir water level rising from 145m to 175m is greater than that with reservoir water level falling from 175m to 145m, and it will provide scientific basis for the treatment of landslide in Three Gorges reservoir.

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