不同计算方法计算滑坡推力与桩前抗力的比较与分析

Calculation of Landslide Thrust and Resistant Force in Front of Anti-sliding Pile by Using Different Methods

不平衡推力法用于计算滑坡推力是可行的，但在计算桩前抗力时，无法考虑桩的变形因素，计算结果偏大，使工程设计偏于不安全。有限元强度折减法用于计算滑坡推力与桩前抗力，遵循桩一土共同作用的原则，计算结果更合理，并可以得到相应的推力与抗力分布。通过分析验证了有限元强度折减法计算抗滑桩的推力与抗力更为可靠。

Imbalance thrust force method （ITFM） used for the calculation of the landslide thrust is viable. But while used to calculate the resistant force before anti-sliding pile, it fails to take into account the deformation of anti-sliding pile and the calculation results arc big, which makes engineering designs unsafe. The strength reduction FEM is used for calculation of the landslide thrust and the resistant force in front of anti-sliding pile, and the interaction between soil and anti-sliding pile can be considered. The calculation results are more reasonable and the distribution of landslide thrust and the resistant force in front of anti-sliding pile can be obtained. Through a series of case studies, the applicability of proposed method is clearly dependable in calculating the landslide thrust and the resistant force in front of anti-sliding pile.