大断面矩形顶管施工引起的管线沉降特性研究
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摘要
包头市阿尔丁大街地下过街通道工程采用三维有限软件FLAC3D模拟矩形顶管施工过程,对照监测数据,得到数值模拟的各管道最大竖向位移,分析监测数据得到各管线的最大位移值。从给水管、煤气管的沉降曲线分析可知轴线正上方三测点发生沉降变形,两边监测点发生隆起变形,管线横向变形曲线与正态分布曲线基本相符,在此基础上制订了包头地区煤气管的变形控制值。
In baotou city, FLAC3D finite software was used to simulate the construction process of rectangular pipe jacking for the underground crossing channel project of alding street. The maximum vertical displacement of each pipe simulated by numerical simulation was obtained by comparing the monitoring data, and the maximum displacement of each pipe was obtained by analyzing the monitoring data. From the settlement curve analysis of the water supply pipe and gas pipe, it can be seen that settlement deformation occurs at the three measuring points directly above the axis, uplift deformation occurs at the monitoring points on both sides, and the transverse deformation curve of the pipeline is basically consistent with the normal distribution curve.
In baotou city, FLAC3D finite software was used to simulate the construction process of rectangular pipe jacking for the underground crossing channel project of alding street. The maximum vertical displacement of each pipe simulated by numerical simulation was obtained by comparing the monitoring data, and the maximum displacement of each pipe was obtained by analyzing the monitoring data. From the settlement curve analysis of the water supply pipe and gas pipe, it can be seen that settlement deformation occurs at the three measuring points directly above the axis, uplift deformation occurs at the monitoring points on both sides, and the transverse deformation curve of the pipeline is basically consistent with the normal distribution curve.
引文
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[2]孙书伟,林杭,任连伟. FLAC3D在岩土工程中的应用[M].北京:中国水利水电出版社,2011.
[3]李围.隧道及地下工程FLAC解析方法[M].北京:中国水利水电出版社,2009.
[4]向卫国,徐玉胜.地铁施工引起地下管线变形的安全评估方法及其应用[J].中国安全生产科学技术,2012,8(5):81–86.
[5]刘波等.FLAC原理、实例与应用指南[M].北京:人民交通出版社,2005.
[6]杨冠天,项彦勇,刘峰.盾构隧道周围地层变形解析法的运用[J].现代隧道技术,2004,41(2):21–24.
[7]姜玲,汪中卫,王旭东.隧道开挖引起地下管线竖向位移的初参数法求解[J].南京工业大学学报(自然科学版),2010,32(4):72–76.
[8]魏纲,朱奎.顶管施工对邻近地下管线的影响预测分析[J].岩土力学,2009,30(3):825–831.
[9]韩煊,雷崇红,张鹏.隧道开挖引起管线沉降计算的刚度修正法[J].土木建筑与环境工程,2012,34(3):21–27.
[10]李昕,周晶,陈健云.考虑土体非线性特性的直埋管道–土体系统的动力反应分析[J].计算力学学报,2001(2):167–172.
[11]刘平,戴燕超.矩形顶管机的研究和设计[J].市政技术,2005,23(2):92–97.