【摘要】 在假定坡体孔隙水水位为水平线且不考虑渗透作用影响的基础上,基于强度折减有限元法分析了水位上升及下降速度对边坡稳定性的影响。对比计算表明,在库水位骤降或陡升条件下,相同库水位对应的边坡安全系数基本上均小于库水位缓慢变化情况下的安全系数。故在实际工程中,无论是排水还是蓄水,都应尽量保持水位缓慢变化,以使边坡处于相对较安全的状态。更多还原

【Abstract】 Based on the assumption of pore water level is a horizontal line and no seepage occurred in the slope,the influence of water-level fluctuation on the stability of slope is investigated with strength reduction of FEM.It is shown that the results of FEM are well agree with that of limit equilibrium method.The factor of safety(FOS) of slope changed from slow decrease to rapid increase with water level slow raise,which gets the minimum value at the ratio of water level-height of slope 0.3,On the contrary,which gets the maximal value when water level as height as slope.There is no influence on FOS when the water level higher than slope.Moreover,the FOS become less at water level rapid drawdown or rapid raise up than that of slow fluctuation.In order to avoid failure of slope,it is advised that water level fluctuated as slowly as human could controlled.更多还原