郑州地铁4号线商都路站1号地下通道矩形顶管施工过程数值模拟与现场监测  

Numerical Simulation and Field Monitoring of Construction Process of Rectangular Pipe Jacking in No.1 Underground Passage of Shangdu Road Station on Zhengzhou Metro Line 4

作　　者：王贺敏 肖尊群 汤东桑 何进江 张卫中 WANG Hemin;XIAO Zunqun;TANG Dongsang;HE Jinjiang;ZHANG Weizhong(Zhengzhou Metro Group Co.,Ltd.,Zhengzhou 450000,Henan,China;Xingfa School of Mining Engineering,Wuhan Institute of Technology,Wuhan 430074,Hubei,China;The 2nd Engineering Co.,Ltd.,of China Railway Tunnel Group,Sanhe 065201,Hebei,China)

机构地区：[1]郑州地铁集团有限公司,河南郑州450000 [2]武汉工程大学兴发矿业学院,湖北武汉430074 [3]中铁隧道集团第二工程处有限公司,河北三河065201

出　　处：《隧道建设（中英文）》2019年第S02期110-119,共10页Tunnel Construction

基　　金：国家自然科学基金(51308424)。

摘　　要：为研究顶管施工对既有污水管道的影响,以郑州市轨道交通4号线商都路站1号大尺寸矩形顶管工程为背景,基于剑桥模型,建立矩形顶管工程施工的有限元分析模型,研究顶管顶进过程中顶管施工影响范围内典型纵断面和横断面的地表沉降变化规律。计算结果表明:1)对于浅埋顶管,顶管施工对地表的变形影响整体表现为沉降;2)顶管机侧摩阻力、顶推力共同作用会造成地表短时间隆起,隆起范围为开挖断面后15~30 m;3)污水管道主要影响隧道侧边上部范围土体水平应力的分布,对隧道深度范围内侧边土体水平应力的影响可以忽略不计,但是大大减小了污水管与管节之间土体竖向应力,减小幅度达到100 kPa。In order to study the influence of jacking pipe on the existing sewage pipe,taking the No.1 large rectangular jacking pipe at Shangdu Road Station of Line 4 of Zhengzhou Rail Transit.The finite element analysis model of the rectangular jacking pipe is established based on the Cambridge model;and the surface subsidence variation law of typical longitudinal section and cross-section in the influence range of jacking pipe construction is studied in the process of pipe jacking.The calculation results show that:(1)The overall effect of jacking pipe on surface deformation is settlement.(2)The combined action of lateral friction resistance of jacking pipe machine and jacking force of excavation section will cause surface uplift in a short time,and the uplift range is within 15-30 m behind excavation section.(3)The sewage pipeline mainly affects the distribution of the horizontal stress of the soil mass in the upper range of the tunnel side,and its influence on the horizontal stress of the soil mass in the tunnel depth range can be ignored,but it greatly reduces the vertical stress of the soil mass between the sewage pipe and the pipe joint,with a reduction range of 100 kPa.

关 键 词：矩形顶管 监测 沉降 顶推力 侧摩阻力 有限元模拟 

分 类 号：U45[建筑科学—桥梁与隧道工程]