水-岩相互作用对库岸边坡稳定的影响研究

在三峡水库运营后，将按计划进行周期蓄、排水。对于构成库岸边坡的岩体来说，将受到库水“饱水-风干”水-岩循环作用造成的岩性劣化，进而对坡体稳定性构成严重危害。以砂岩为代表岩体，通过试验模拟了库岸边坡岩体在库水涨落情况下水-岩作用的过程，得出了砂岩受库水“饱水-风干”水-岩循环作用后抗剪强度的劣化规律。结合试验结果，运用FLAC进行了水-岩循环作用下岸坡稳定性的数值模拟，为库岸边坡的稳定性分析提供了有益的依据。

Stability of reservoir bank slope under water-rock interaction

Periodic impoundment and drainage of the reservoir water will be implemented as planned after the Three Gorges Reservoir operation. The rock masses which constitute the reservoir bank will have lithology deterioration under “saturated water-air drying” water-rock circulation function, which will further constitute a great damage on bank stability. An experiment models the process of water-rock interaction on reservoir bank under reservoir water fluctuation with sand rock as a representative. And the result of the experiment is applied to numerical stimulation of the stability of reservoir bank under water-rock interaction with FLAC. The deterioration rule of sand rock’s shear strength under “saturated water-air drying” water-rock interaction of reservoir water is concluded, which provides a favorable evidence for the bank stability analysis.