大断面矩形土压平衡式顶管上跨施工对运营地铁隧道变形的影响分析

易丹; 严德添; 党军

doi:10.3973/j.issn.2096-4498.2018.04.010

隧道建设 >

2018 , Vol. 38 >Issue 4: 594 - 602

DOI: https://doi.org/10.3973/j.issn.2096-4498.2018.04.010

研究与探索

大断面矩形土压平衡式顶管上跨施工对运营地铁隧道变形的影响分析

易丹 ,
严德添 ,
党军

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（1. 中国中铁二院工程集团有限责任公司，四川成都 610031； 2. 西南交通大学交通隧道工程教育部重点实验室，四川成都 610031； 3. 西南交通大学，四川成都 610031）

易丹（1986—），男，四川成都人， 2012年毕业于北京交通大学，地下工程专业，硕士，工程师，主要从事盾构法、顶管法相关设计及研究工作。Email： 164991948@qq.com。

收稿日期: 2017-06-02

修回日期: 2017-10-09

网络出版日期: 2018-05-06

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Study of Influence of Construction of Large Crosssection Rectangular EPBtype Pipe Jacking Tunnel on Below Operating Metro Tunnel Deformation

YI Dan ,
YAN Detian ,
DANG Jun

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（1. China Railway Eryuan Engineering Group Co., Ltd., Chengdu 610031, Sichuan, China; 2. Key Laboratory of Transportation Tunnel Engineering, Ministry of Education, Southwest Jiaotong University, Chengdu 610031, Sichuan, China; 3. Southwest Jiaotong University, Chengdu 610031, Sichuan, China）

Received date: 2017-06-02

Revised date: 2017-10-09

Online published: 2018-05-06

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摘要

以川大停车场下穿人民南路地下人行通道矩形顶管隧道工程为依托，采用数值模拟方法对大断面矩形土压平衡式顶管隧道上跨地铁运营区间隧道所引起的地铁隧道变形进行全过程分析研究，并将模拟结果与现场监测数据进行对比，验证模型的合理性。主要结论如下： 1）顶管法隧道上跨施工引发的既有地铁隧道竖向变形受前期掌子面支护压力影响较大，随着开挖面的推进，开挖卸载效应逐渐占据主导地位； 2）地铁隧道横向位移受顶管隧道掌子面支护压力和开挖卸载效应的共同影响，且地铁隧道管片衬砌上半断面的横向位移对掌子面支护压力极为敏感。

关键词： 大断面顶管隧道; 上跨地铁隧道; 变形; 支护压力; 开挖卸载效应

本文引用格式

易丹 , 严德添 , 党军 . 大断面矩形土压平衡式顶管上跨施工对运营地铁隧道变形的影响分析[J]. 隧道建设, 2018 , 38(4) : 594 -602 . DOI: 10.3973/j.issn.2096-4498.2018.04.010

Abstract

The influence of large crosssection rectangular EPBtype pipe jacking tunnel under South Renmin Road on below operating metro tunnel deformation is analyzed; and then comparison between simulation results and monitoring data is made to verify the rationality of the simulation model. Some conclusions are drawn as follows: (1) The vertical deformation of the below existing metro tunnel induced by the construction of the pipe jacking tunnel is greatly affected by supporting pressure of excavation face in the early stage; and it is mainly affected by excavation unloading effect as the excavation face moves forward. (2) The horizontal displacement of the metro tunnel is affected by supporting pressure of excavation face and excavation unloading effect; and the upper crosssection of metro tunnel segment lining is significantly affected by supporting pressure of excavation face.

Key words： large crosssection pipe jacking tunnel; crossing above metro tunnel; deformation; supporting pressure; excavation unloading effect

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