双排抗滑桩受力规律的数值研究

采用FLAC3D程序，分析了三维状态下双排桩加固滑坡时滑坡剩余下滑力在前、后排桩上的分配规律，以及当滑体抗剪强度参数变化时桩后推力与桩前抗力的分布规律。结果表明：当桩间距在2～5倍桩宽、桩排距在1～8倍桩高范围内变化时，前、后排桩对剩余下滑力的分担比在4∶6和3∶7之间变化；前排桩的桩后推力与桩前抗力分布形态分别接近于梯形和抛物线形，后排桩则均接近于梯形。研究成果可为滑坡加固工程设计时参考。

Numerical research on forcing law of double anti - sliding pile

The distribution law of surplus sliding force at the front and rear row of reinforced piles under 3D state and the distribution of rear thrust and front resistant force when anti-shear strength of sliding body varies are analyzed by FLAC3D program.The analysis result shows that the sharing ratio of surplus sliding force by front and rear piles ranges from 4:6 to 3:7 when the distance between piles ranges from 2 to 5 times of pile width and the distance between pile-rows ranges from 1 to 8 times of pile height;the distribution graphic forms of rear thrust and front anti-sliding force of front-row pile are close to the trapezoid and parabolic shape and those of rear-row pile are in trapezoid shape.