深基坑开挖对临近地铁隧道的影响
发布时间：2018-09-12 18:31
【摘要】：城市化带来的交通拥堵问题越来越严重,地铁成为重要的交通工具之一,地铁沿线的建筑物也随之兴起。建筑物的施工对临近地铁隧道的影响成为工程界不可忽视的一大问题,其中深基坑开挖卸荷导致地铁产生附加变形和内力,可能会严重影响地铁隧道的安全。如何准确预测深基坑开挖对已有地铁隧道的影响,是一项急需解决的课题。本文的主要工作包括： 1)在收集和统计国内外28个临近既有地铁隧道的基坑工程案例的基础上,应用数理统计方法,对工程概况、基坑与隧道的相对位置关系、坑内外土体加固、地下水以及时空效应等因素进行分析,总结了基坑开挖引起的临近地铁隧道变形的基本规律。 2)基于杭州某一工程实例,采用Plaxis3D有限元软件建立基坑三维有限元分析模型,其中土体本构模型分别采用MC模型、HS模型和HSS模型,分析基坑开挖引起隧道变形、地连墙水平位移及地表沉降等,并将各模型计算结果与工程实际监测数据进行比较,整理可知应用HSS模型分析的结果与实测数据最为吻合。 3)针对杭州东部典型软土,土体本构模型采用HSS模型建立基坑三维有限元分析模型,分析隧道与基坑相对水平距离、相对高差、基坑开挖深度、基坑分区开挖、隧道环外部土体扰动区、地下水以及单双基坑开挖对临近地铁隧道变形等的影响规律。
[Abstract]:The traffic congestion caused by urbanization is becoming more and more serious. Subway becomes one of the most important means of transportation, and the buildings along the subway also rise. The influence of the building construction on the adjacent subway tunnel has become a big problem which can not be ignored by the engineering circle. The excavation and unloading of deep foundation pit may lead to the additional deformation and internal force of the subway, which may seriously affect the safety of the subway tunnel. How to accurately predict the influence of deep foundation pit excavation on existing subway tunnels is an urgent task to be solved. The main work of this paper is as follows: 1) based on the collection and statistics of 28 cases of foundation pit engineering near the existing subway tunnel at home and abroad, the paper applies mathematical statistical method to analyze the general situation of the project and the relative position relationship between the foundation pit and the tunnel. Based on the analysis of the factors such as soil reinforcement, groundwater and space-time effect inside and outside the pit, the basic law of deformation caused by excavation of foundation pit near subway tunnel is summarized. 2) based on an engineering example in Hangzhou, The three-dimensional finite element analysis model of foundation pit is established by using Plaxis3D software. Among them, the MC model and the HSS model are used to analyze the tunnel deformation, horizontal displacement and ground subsidence caused by foundation pit excavation. The calculated results of each model are compared with the actual monitoring data of engineering, and the result of HSS model analysis is the most consistent with the measured data. 3) aiming at the typical soft soil in the eastern part of Hangzhou, The HSS model is used to establish the three-dimensional finite element analysis model of foundation pit. The relative horizontal distance between tunnel and foundation pit, the relative height difference, the excavation depth of foundation pit, the zonal excavation of foundation pit, the disturbed area of soil outside the tunnel ring are analyzed. The influence of groundwater and excavation of single and double foundation pit on the deformation of adjacent subway tunnel.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U231;TU753
本文编号：2239880
[Abstract]:The traffic congestion caused by urbanization is becoming more and more serious. Subway becomes one of the most important means of transportation, and the buildings along the subway also rise. The influence of the building construction on the adjacent subway tunnel has become a big problem which can not be ignored by the engineering circle. The excavation and unloading of deep foundation pit may lead to the additional deformation and internal force of the subway, which may seriously affect the safety of the subway tunnel. How to accurately predict the influence of deep foundation pit excavation on existing subway tunnels is an urgent task to be solved. The main work of this paper is as follows: 1) based on the collection and statistics of 28 cases of foundation pit engineering near the existing subway tunnel at home and abroad, the paper applies mathematical statistical method to analyze the general situation of the project and the relative position relationship between the foundation pit and the tunnel. Based on the analysis of the factors such as soil reinforcement, groundwater and space-time effect inside and outside the pit, the basic law of deformation caused by excavation of foundation pit near subway tunnel is summarized. 2) based on an engineering example in Hangzhou, The three-dimensional finite element analysis model of foundation pit is established by using Plaxis3D software. Among them, the MC model and the HSS model are used to analyze the tunnel deformation, horizontal displacement and ground subsidence caused by foundation pit excavation. The calculated results of each model are compared with the actual monitoring data of engineering, and the result of HSS model analysis is the most consistent with the measured data. 3) aiming at the typical soft soil in the eastern part of Hangzhou, The HSS model is used to establish the three-dimensional finite element analysis model of foundation pit. The relative horizontal distance between tunnel and foundation pit, the relative height difference, the excavation depth of foundation pit, the zonal excavation of foundation pit, the disturbed area of soil outside the tunnel ring are analyzed. The influence of groundwater and excavation of single and double foundation pit on the deformation of adjacent subway tunnel.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U231;TU753
【参考文献】
相关期刊论文 前10条
1 周建昆;李志宏;;紧邻隧道基坑工程对隧道变形影响的数值分析[J];地下空间与工程学报;2010年S1期
2 肖同刚;;基坑开挖施工监控对临近地铁隧道影响分析[J];地下空间与工程学报;2011年05期
3 赵志强;张冬梅;;临近基坑开挖对地铁区间隧道影响评价[J];地下空间与工程学报;2011年05期
4 陈锦剑;王建华;杜毅;温锁林;向国威;;两侧深基坑开挖影响下浅埋运营隧道的位移特性[J];地下空间与工程学报;2011年06期
5 张明远;杨小平;刘庭金;;临近地铁隧道的基坑施工方案对比分析[J];地下空间与工程学报;2011年06期
6 邵华;王蓉;;基坑开挖施工对邻近地铁影响的实测分析[J];地下空间与工程学报;2011年S1期
7 刘建航;;地下墙深基坑周围地层移动的预测和治理之二——基坑周围地层移动的预测[J];地下工程与隧道;1993年02期
8 孔令荣;崔永高;隋海波;;基坑开挖对邻近地铁变形的影响分析[J];工程勘察;2010年06期
9 戴博红;;深基坑施工对邻近地铁隧道的影响预测[J];城市轨道交通研究;2008年08期
10 汪小兵;贾坚;;深基坑开挖对既有地铁隧道的影响分析及控制措施[J];城市轨道交通研究;2009年05期
，本文编号：2239880
本文链接：https://www.wllwen.com/jingjilunwen/jianzhujingjilunwen/2239880.html
