弹性抗滑桩内力计算新模式及其有限差分解法

由于滑动面的存在 ,使滑体与滑床分割开来 ,也使抗滑桩以滑动面为界分为上、下受力和变形特点不同的两部分。基于弹性抗滑桩实际受力与变形的情况 ,提出了一种新的计算模式。根据该模式 ,采用有限差分法进行全桩的内力分析 ,推导出了相应的计算公式 ,编写了计算和图形处理程序。工程实例计算结果表明 ,该方法计算结果符合理论分析和我国现场试桩得出的规律。同时与现有计算方法相比 ,桩身最大弯矩显著减小 ,从而可使抗滑桩的潜力大大提高。使抗滑桩的设计与计算更加合理 ,经济而有效地治理滑坡。

A NEW MODE FOR CALCULATING INTERNAL FORCES OF STABILIZING PILE

A sliding mass is separated off the bed due to the sliding surface.Meanwhile ,a stabilizing pile is also divided into two parts under the sliding surface;there are different in the forces and displacements.A new model is proposed based on the different states of forces and displacements.The finite difference method is used to determinate the internal forces of the pile based on the model. At the same time,a program is developed.A numerical example is shown that the result of the approach is in agreement with that of the other data from books and site tests.It is found that the maximum moment of the pile is decreased obviously.