基于传递系数法确定支护桩设计推力的新方法

A New Method on Ascertaining Designed Thrust for Timbering Pile Based on Transfer Coefficient Method

针对目前传递系数法不能计算桩前抗力确定支护桩设计推力的问题,提出了一种基于传递系数法支护桩设计推力计算的新方法:利用传递系数法的思想,在工程安全要求条件下,从上往下分析各条块的剩余下滑力,同时逆向计算各条块的剩余抗滑力,支护桩设置处剩余下滑力与剩余抗滑力在水平方向上的差值即为支护桩的设计推力值,并给出了相应设计推力表达式。通过与其他计算方法比较,证明了该方法的合理性。该方法不需要考虑推力传递系数或修正量,直接给出了设计推力的表达式,计算简便,实用性强。

To overcome the problem that the transfer coefficient method used for the calculation of the landslide thrust behind anti-slide pile was viable,and the designed thrust could not be ascertained through the calculation of sliding-resistance force before anti-slide pile,a new method of calculating the designed thrust of timbering pile which based on transfer coefficient method was put forward.Based on the idea of transfer coefficient method,under the engineer safety request,the residual sliding force was calculated from up to down,and residual sliding-resistance force was inversely calculated from down to up simultaneously.Designed thrust of the setting of timbering pile was equal to horizontal difference between residual sliding force and residual sliding-resistance force,and the expression of designed thrust was presented.Compared with other methods of calculation,this method was proved reasonably.