| 抗滑桩全桩计算的有限差分法 |
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| 引用本文： | 刘代文,廖小平,王浩,程建军.抗滑桩全桩计算的有限差分法[J].中国地质灾害与防治学报,2007(Z1). |
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| 作者姓名： | 刘代文 廖小平 王浩 程建军 |
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| 作者单位： | 福州大学土木工程学院 铁道科学研究院 铁道科学研究院 福建福州 福建福州 中铁西北科学研究院 甘肃兰州 |
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| 摘 要： | 有限差分法求解分析抗滑桩(或预应力锚索抗滑桩)常采用Winkle弹性地基梁法。在对有限差分法分析的基础上,文章改进了有限差分法求解抗滑桩全桩内力和变形的计算方法。对全桩整体采用有限差分方法求解其内力,避免了将桩身分为受荷段和锚固段及利用滑面处连续条件求解的复杂过程。该方法对滑坡推力与地基系数取值,可依据实际情况假定为广义形式来模拟土体对抗滑桩的作用工况。能很好地求解预应力锚索作用于桩身或桩身设多道锚索工况下的锚索拉力值。并利用Excel对该方法编程,能便捷地计算抗滑桩内力。分析计算结果,当差分节点单元长度适当时,计算结果能够较好地满足工程应用。对比有限元计算分析结果,相同节点单元长度下两者计算相差较小,且节点长度越小,越接近有限元结果。
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| 关 键 词： | 抗滑桩 全桩计算 有限差分法 预应力锚索 Winkle弹性地基梁 |
Finite difference method for calculation of internal forces of whole stabilizing piles |
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| LIU Dai-wen,LIAO Xiao-ping.Finite difference method for calculation of internal forces of whole stabilizing piles[J].The Chinese Journal of Geological Hazard and Control,2007(Z1). |
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| Authors: | LIU Dai-wen LIAO Xiao-ping |
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| Institution: | LIU Dai-wen~1,LIAO Xiao-ping~ |
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| Abstract: | Finite difference method of elastic foundation beam of Winkle model is used to calculate the internal force of stabilizing or prestressed anchoring stabilizing piles at present.Based on the analysis of the finite difference method,in this paper,the authors calculated the internal force by an improved finite difference method.The traditional method gained the solution through the complex solving process using the slide face condition of continuity(The stabilizing pile is usually divided into the loaded segment and the anchored segment).It can avoid dividing the pile into loaded segment and anchored segments.It has realized the true sense of the solution of whole stabilizing pile.The value of landslide thrust force and the foundation coefficient may simulate the stabilizing function to the soil body according to the actual situation.It is a very good solution for prestressed anchoring cable,and may not affect its pulling force value in the head of pile or the pile body under the multi-channel operating.And the use of Excel programming method can calculate the stabilizing pile internal force conveniently.Calculation result reveal,when the unit length is suitable,the result can satisfy with the engineering application.Compare with the results of finite element method,they are approximately equality,and if the unit length shorter,the result is more close to the FEM. |
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| Keywords: | anti-sliding piles calculation of whole piles finite difference method prestressed anchoring cable elastic foundation beam of Winkle model |
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