基于桩周土体位移的锚拉抗滑桩计算方法研究  

Study on calculation method of anchored stabilizing piles based on displacement of soil around piles

作　　者：叶晓明[1] 王振[1] 干飞[1] 

机构地区：[1]重庆大学土木工程学院,重庆400045

出　　处：《岩石力学与工程学报》2016年第A01期3187-3194,共8页Chinese Journal of Rock Mechanics and Engineering

摘　　要：传统锚拉抗滑桩计算模型不能科学的考虑锚索对于桩–土相互作用的影响,往往导致锚索拉力和桩身内力计算的不合理。将抗滑桩全桩视为弹性地基梁,分两阶段建立基于桩周土体位移的桩–土相互作用力学控制方程组。应用桩顶初参数法推导桩身力学响应数学解析表达式,并编制Matlab计算程序对桩身内力和位移进行计算。与一组模型实验数据进行对比表明:位移法计算模型及其解析解法具有可行性。将该模型应用于一个工程实例分析表明:计算模型可以考虑张拉阶段桩后岩土体的作用,可以考虑桩–土–锚索的相互作用。Traditional anchored piles calculation model can＇t scientifically consider the effects of anchor to pile-soil interaction, often leads to unreasonable anchor tension and pile body internal force. This paper saw whole pile as a beam on elastic foundation, a two-stage pile-soil interaction mechanics control equations based on displacement method was established. The mathematics analytic solution of control equations were obtained by initial parameter method. Matlab computing program was compiled for the calculation of internal forces and displacements. The comparison with a set of model test data showed that： the displacement method calculation model and its analytic solution in this paper is feasible. The model was applied to a project case showing that： the displacement method calculation model can consider the role of soil around piles in tensioning stage, and can consider the interaction of pile-soil-anchor.

关 键 词：基础工程 锚拉抗滑桩 桩-土相互作用 弹性地基梁 初参数法 位移法计算模型 

分 类 号：TU47[建筑科学—结构工程]