地铁隧道施工诱发桩基变形的数值仿真分析  

Numerical simulation analysis of deformation of pile foundation due to urban metro tunneling construction

作　　者：柳厚祥[1] 方风华[2] 李宁[1] 吴从师[2] 

机构地区：[1]西安理工大学岩土所,陕西西安710048 [2]长沙理工大学岩土所

出　　处：《中南大学学报（自然科学版）》2007年第4期771-777,共7页Journal of Central South University:Science and Technology

基　　金：高等学校博士学科点专项科研基金资助项目(2004700001);湖南省自然科学基金资助项目(03JJY3078;04JJ40032);湖南省教育厅重点科研基金资助项目(03A006);长沙理工大学科研基金资助项目(30007)

摘　　要：利用数值分析软件ANSYS建立弹塑性有限元模型;考虑位于区间隧道轴线不同位置的邻近桩基及不同桩长情况,对区间隧道施工诱发邻近桩基的变形进行数值仿真试验分析,同时分析隧道开挖后土体与桩体参数等因素对邻近桩基变形的影响。数值仿真试验结果表明:地铁隧道开挖后桩体发生倾倒变形,桩端与洞轴线的相对位置及桩端土性对桩基变形有明显的影响,有桩侧隧道周围向洞内的水平位移比无桩侧的水平位移小,且随桩长增加,两者差别增大。An elastic-plastic FEM computational model was established via numerical simulation software ANSYS, which is used to study the deformation of the adjacent pile foundation during tunneling construction. The influence factors of the adjacent pile foundation deformation which mainly includes soil and pile parameters were also analyzed, The results of the numerical simulation analysis indicate that slip deformations are induced in adjacent piles due to tunneling. The positions of pile end relative to the tunnel axis and the parameters of soil in the pile end have great effects on the deformations of adjacent piles. The horizontal movement around the tunnel is unsymmetrical, and the horizontal movement in the side of the tunnel which has pile is smaller than that of the other side which has no pile.

关 键 词：地层位移 隧道 桩基 水平变形 竖向变形 

分 类 号：TU473[建筑科学—结构工程] U455.43[建筑科学—土工工程]