上软下硬地层中地铁车站抗浮抗拔桩模拟研究  

Simulation Study on Anti Floating and Anti Pulling Piles of SubwayStations in Upper Soft and Lower Hard Strata

作　　者：李平安 邓永忠 刘云亮 张瑞琳 黄锋 LI Pingan;DENG Yongzhong;LIU Yunliang;ZHANG Ruilin;HUANG Feng(Shenzhen Metro Group Co.Ltd.,Shenzhen 518026,China;China Railway Design Group Co.Ltd.,Tianjin 300142,China;School of Civil Engineering,Chongqing Jiaotong University,Chongqing 400047,China)

机构地区：[1]深圳市地铁集团有限公司,深圳518026 [2]中国铁路设计集团有限公司,天津300142 [3]重庆交通大学土木工程学院,重庆400047

出　　处：《科技和产业》2023年第18期247-253,共7页Science Technology and Industry

摘　　要：依托深圳七号线黄木岗换乘改造工程,针对运营地铁车站结构构件拆除,采用数值模拟方法,探究了抗拔桩的物理力学特性。研究结论表明,随着持力层的增加,模型桩的最大拉应力、抗拔能力、桩侧摩阻力都是不断增大;有地下水作用条件下会对模型桩的相关物理特性起到弱化作用;将模型桩研究结论运用于实际工程中,可以有效控制整体车站的位移变化,并远远低于规范规定值。由此可知,将抗拔桩运用于大型地铁车站改造是可行的,为相关类似工程提供参考依据。Relying on the Huangmugang Transfer and Renovation Project of Shenzhen Metro Line 7,numerical simulation methods are used to explore the physical and mechanical properties of uplift piles for the demolition of structural components of operating subway stations.The research conclusions are as follows.With the increase of the bearing layer,the maximum tensile stress,uplift resistance,and pile side friction of the model pile continue to increase.Under the condition of groundwater,it will weaken the relevant physical characteristics of the model pile.Applying the research conclusions of the model pile to practical engineering can effectively control the displacement changes of the overall station,which are far below the specified values in the specifications.From this,it can be seen that using anti uplift piles for the renovation of large subway stations is feasible,providing a reference basis for similar projects.

关 键 词：结构拆除 模型桩 地下水作用 结构位移 

分 类 号：U45[建筑科学—桥梁与隧道工程]