天津地铁盾构隧道四线交汇掘进数值分析

徐子川; 李建高; 王长虹

doi:10.3973/j.issn.1672-741X.2016.03.008

隧道建设 >

2016 , Vol. 36 >Issue 3: 295 - 300

DOI: https://doi.org/10.3973/j.issn.1672-741X.2016.03.008

研究与探索

天津地铁盾构隧道四线交汇掘进数值分析

徐子川 ,
李建高 ,
王长虹

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（1. 同济大学地下建筑与工程系，上海 200092； 2. 中铁隧道集团三处有限公司，广东深圳 518052；3. 上海应用技术学院轨道交通学院，上海 201418）

徐子川(1991—)，男，河南洛阳人，同济大学隧道与地下建筑工程专业在读硕士，研究方向为盾构隧道施工控制。Email: 07xuzichuan@gmail.com。*通讯作者：王长虹，Email: changhong_wang@163.com。

收稿日期: 2015-06-29

修回日期: 2015-12-11

网络出版日期: 2016-03-30

基金资助

国家自然科学基金项目（51208303）

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Numerical Analysis of Interaction of Excavation of Four Adjacent Shield Tunnels: A Case Study on Tianjin Metro

XU Zichuan ,
LI Jian’gao ,
WANG Changhong

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(1．Department of Geotechnical Engineering, Tongji University, Shanghai 200092，China; 2. China Railway Tunnel Group Sanchu Co., Ltd., Shenzhen 518052, Guangdong, China; 3. School of Railway Transportation, Shanghai Institute of Technology, Shanghai 201418, China)

Received date: 2015-06-29

Revised date: 2015-12-11

Online published: 2016-03-30

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摘要

为解决多条近接隧道施工时后行隧道开挖对先行隧道结构造成的不利影响，以天津地铁5、6号线四线交汇隧道为研究对象，选取典型复杂断面，采用数值软件FLAC3D，模拟富水地层中四线交汇隧道开挖时隧道结构之间的相互影响规律。结果表明：该复杂断面处，后行隧道施工使先行隧道整体位移具有偏向开挖隧道移动的牵引趋势，且先行下部隧道竖向整体位移较横向整体位移变化更为显著。在渗流作用下，先行下部隧道施工产生的地表沉降量及沉降范围相比后行上部隧道较大，验证了富水地层中渗流作用对土体变形影响程度及范围均远大于开挖应力释放的影响。

关键词： 盾构隧道; 四线交汇; FLAC3D; 渗流作用; 地表沉降

本文引用格式

徐子川 , 李建高 , 王长虹 . 天津地铁盾构隧道四线交汇掘进数值分析[J]. 隧道建设, 2016 , 36(3) : 295 -300 . DOI: 10.3973/j.issn.1672-741X.2016.03.008

Abstract

The excavating tunnel has an adverse effect upon the excavated tunnels during the construction of multiple adjacent tunnels. In this paper, the typical crosssection of the connection section between Line No. 5 and Line No. 6 of Tianjin Metro is analyzed by means of FLAC3D software; and then the interaction of excavating the four adjacent shield tunnels in waterrich stratum is simulated. The results show that: 1) The excavated tunnels incline to the excavating tunnel. The vertical displacement of lowerlaid tunnel is more obvious than the horizontal displacement. 2) The ground surface settlement and the settlement scope induced by lowerlaid excavated tunnel are larger than that induced by upperlaid excavating tunnels under seepage action; and it is proved that the influence of seepage action on waterrich ground settlement and settlement scope are larger than those of excavation stress releasing.

Key words： shield tunnel; fourtunnel converging; FLAC3D; seepage action; ground surface settlement

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