基于改进有限元重度增加法的抗滑桩加固边坡稳定性分析

针对目前抗滑桩设计中存在的计算结果主观性较大,且常规的有限元重度增加法的计算结果偏大的问题,基于理论推导对常规有限元重度增加法进行了改进,并将该改进方法应用于某边坡工程中,建立了自然边坡三维有限元模型,计算了该自然边坡的整体安全系数,并与极限平衡法和强度折减法进行对比分析,验证了改进方法的有效性,进而将其应用于抗滑桩加固边坡稳定性分析中,通过与相同安全系数下通用理正软件的计算结果相比,表明该改进方法在计算抗滑桩加固边坡稳定性中具有可行性。

Slope Stability Analysis of Anti-sliding Pile Strengthening Based on Improved Finite Element Density Increase Method

At present, there is large subjectivity of computing results for design of anti-sliding pile and the result obtained by the traditional finite element density increase method is larger. So, we improve the traditional finite element density increase method through theoretical derivation firstly. Then we built three-dimensional finite element model of a natural slope and calculated its overall safety factor. Compared the results with limit equilibrium method and strength reduction method, the effectiveness of improved method is verified. Finally, we applied it to slope stability analysis of anti-sliding pile strengthening. Compared its results with that of universal Li Zheng software under the same safety factor, it proves that the improved method is feasible to calculate slope stability of anti-sliding strengthening.