预应力锚索抗滑桩内力计算的有限差分“m-k”法  

Finite difference “m-k” method for calculating internal forces of a cable anchored anti-slide pile

作　　者：杨佑发[1] 刘光华 

机构地区：[1]重庆大学土木工程学院,重庆400045 [2]重庆市地质勘察总公司208队,重庆400700

出　　处：《中国地质灾害与防治学报》2002年第3期78-81,104,共5页The Chinese Journal of Geological Hazard and Control

摘　　要：文章基于地基系数“m -k”法的原理 ,提出进行锚索抗滑桩全桩内力计算的有限差分法 ,同时 ,编写了该法的计算和图形处理程序。实例计算结果表明 :只要等量差分段取得足够小 ,虽然所耗机时稍长 ,但可获得高精度数值解 ,其精度高于采用传统手算法所得的精度 ,而且图形处理结果可优化抗滑桩的结构设计 ,并考虑了各种桩底支承条件。本方法基本原理同悬臂桩法 ,滑动面以下锚索桩的内力计算与普通桩完全相同。滑动面以上不同的只是此时的桩顶条件有所不同 ,必须考虑锚索拉力的作用。地基系数“m -k”法适用于滑动面以上地层为土层或严重风化岩层。Based on the principle of the foundation coefficient “m-k” method,the finite difference method is presented to analyze the internal forces of a cable anchored anti slide pile.The calculation and image processing are programmed.An example shows that the solution with high precision can be obtained if the segments are small enough although more computing time may be consumed.Obviously,the calculation precision is better than that of traditional method.The results of image processing by the program optimize the construction design of anti slide piles.The basic principle of the method is the same as that of cantilever pile.The estimation of internal forces of a cable anchored pile under the sliding surface is exactly the same as that of an ordinary pile,while it is different above the sliding surface considering the tensile force of the anchorage cable.The “m-k” method is applicable to the soil layer or weathered strata above the sliding surface and unweathered strata beneath the sliding surface.

关 键 词：预应力锚索抗滑桩 内力计算 有限差分 地基系数“m-k” 锚索拉力 

分 类 号：TU753.8[建筑科学—建筑技术科学]