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：李美霖 Li Meilin(School of Civil Engineering,Guizhou University,Guiyang,China)

机构地区：[1]贵州大学土木工程学院,贵州贵阳

出　　处：《科学技术创新》2023年第19期117-120,共4页Scientific and Technological Innovation

摘　　要：假设桩后土体位移沿滑坡体深度线性分布,抗滑桩可以视为弹性地基梁。分两个阶段创建基于位移法的桩-土相互作用力学控制方程组,运用初参数法推导出桩身力学响应的数学表达式,编写Matlab计算程序计算锚拉抗滑桩的桩身内力和位移,并与FlAC3D有限差分模型、传统土压力法计算结果进行对比,表明本文解析方法的可以很好的考虑桩-土-锚索的相互作用,传统土压力法计算相对保守。最后对锚拉抗滑桩的桩-土相互作用全过程分析,桩身内力和位移的动态调整过程呈现出很强的规律性。这些研究成果可为锚索抗滑桩的结构设计及内力计算提供理论依据。Assuming that the soil displacement after the pile is linearly distributed along the depth of the landslide,the anti-slip pile can be regarded as an elastic foundation beam.The mechanical control equation system of pile-soil interaction based on the displacement method is created in two stages,the mathematical expression of the mechanical response of the pile body is derived by the initial parameter method,and the Matlab calculation program is written to calculate the internal force and displacement of the anchor-pulled anti-slip pile,and compared with the results of FlAC3D finite difference model and traditional earth pressure method,show that this analytical method can well consider pile-soil-anchor interaction and traditional earth pressure method is relatively conservative.Finally,the entire process analysis of pile-soil interaction indicates that pile body internal force and displacement of the dynamic adjustment showing a very strong regularity.The results of this study provide theoretical basis for the structure design and internal force calculation of anchored stabilizing pile.

关 键 词：两阶段 位移法 锚拉抗滑桩 桩-土相互作用 初参数法 

分 类 号：TU47[建筑科学—结构工程]