地震作用下抗滑桩支护边坡的动力响应分析

Dynamic Response Analysis on Slope Supported By Slide-resistant Pile Under Earthquake

由于目前抗滑桩支护边坡抗震动力分析理论方法的不足,本文提出了一种地震作用下抗滑桩支护边坡动力响应分析的解析法。基于土动力学理论推导出抗滑桩支护边坡在水平地震作用下的动力运动方程,建立了抗滑桩支护边坡的动力计算模型,求出了边坡土层在水平地震作用下的水平位移响应解析解。算例分析表明,对于水平地震作用下的有桩作用的土层,其水平位移响应的振幅增大系数比无桩作用的土层要小得多,进一步对抗滑桩支护边坡的效果进行了分析,得出抗滑桩对于边坡支护具有很好的抗震作用。与离散元法数值模拟方法进行了对比,结果较吻合,表明本文方法是合理可行的。

Due to the lack of theoretical method for dynamic analysis of slope supported by slide-resistant pile under earthquake,an analytical method for dynamic response analysis of slope supported by slide-resistant pile under earthquake is presented.The equation of dynamic motion of slope supported by slide-resistant pile under horizontal earthquake is derived based on the theory of soil dynamics,then the model of dynamic calculation is established,and the analytical solution for horizontal displacement response of slope layer under horizontal earthquake is solved.Combined with a specific example,it is obtained that the amplitude amplification factor of horizontal displacement response of the soil layer with pile is much smaller than that of soil layer without pile,further,by analyzing the effect of slide-resistant pile supporting slope,it is obtained that slide-resistant pile support has excellent anti-seismic effect for slope.Compared with numerical simulation method of discrete element,the results show a good agreement,and that indicates this method is reasonable and feasible.