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浙江大学学报(工学版)
浙江大学学报(工学版)  2018, Vol. 52 Issue (3): 420-430    DOI: 10.3785/j.issn.1008-973X.2018.03.002
土木与交通工程     
考虑隧道剪切效应的隧道下穿对既有盾构隧道的纵向影响
梁荣柱1,2, 宗梦繁1, 康成1, 吴文兵1, 方宇翔1, 夏唐代2, 程康2
1. 中国地质大学(武汉) 工程学院, 湖北 武汉 410074;
2. 浙江大学 建筑工程学院, 浙江 杭州 310058
Longitudinal impacts of existing shield tunnel due to down-crossing tunnelling considering shield tunnel shearing effect
LIANG Rong-zhu1,2, ZONG Meng-fan1, KANG Cheng1, WU Wen-bing1, FANG Yu-xiang1, XIA Tang-dai2, CHENG Kang2
1. Engineering Faculty, China University of Geosciences(Wuhan), Wuhan 430074, China;
2. College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China
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摘要：

将既有隧道简化为能考虑隧道剪切效应的Timoshenko梁，提出在隧道开挖作用下既有隧道纵向响应的解析解答.通过两阶段分析法，分析隧道开挖过程中既有隧道的变形及内力响应.基于修正的Loganathan和Polous地层位移理论，预测新旧隧道成任意夹角情况下隧道开挖引起的自由土体沉降分布；把隧道开挖引起的自由土体沉降施加于既有隧道之上，并基于Timoshenko梁理论，建立考虑隧道剪切效应的既有隧道纵向变形微分平衡方程；通过有限差分法求得在自由土体沉降作用下既有隧道纵向变形及内力数值解答.收集2个已发表工程实测数据，并与所提方法和Euler-Bernoulli法得到的计算结果进行对比.通过对比分析发现，实测结果与两者计算结果有良好的一致性；相对于所提方法，基于Euler-Bernoulli梁的计算结果明显高估了隧道的弯矩、剪力及接头张开量；所提方法能有效模拟既有隧道剪切效应，因而可进一步得到隧道开挖作用下的既有隧道错台量.研究成果可为合理预测隧道开挖对既有隧道影响提供一定的理论支持.
Abstract:

An analytical method considering the shearing effect of tunnel was proposed to assess the tunnel longitudinal responses induced by tunnelling. The existing shield tunnel was modeled by Timoshenko beam, which considers the tunnel shearing effect. Two-stage analysis method was applied to analyze the tunnelling-induced existing shield tunnel deformation and internal force responses. First, the tunnelling-induced free ground settlement was predicted by using the modified Loganathan and Polous's theory when there was an oblique angle between the new and old tunnels. Second, the induced free ground settlement was imposed on the existing tunnel; the equilibrium differential equations for tunnel responses considering the shield tunnel shearing effect were then established based on the Timoshenko beam theory. Eventually, the equilibrium differential equation for longitudinal displacement was solved numerically by using the finite difference method (FDM). The effectiveness of the proposed method was verified by two well-documented published case histories. General good agreement is observed between the measured data and the results obtained from the proposed and the Euler-Bernoulli beam methods. Compared with the proposed method, the theory based on the Euler-Bernoulli beam remarkably overestimates the bending moments, shear forces and joint openings of existing shield tunnel. The dislocations between the adjacent segmental linings of tunnel can be further obtained by the proposed method due to its inherent advantage of modeling the shear effect of shield tunnel. In general, the proposed method may provide a certain theoretic basis to estimate the tunnel longitudinal responses induced by beneath tunnelling.
收稿日期: 2016-10-21 出版日期: 2018-09-11
CLC:  U45  
基金资助:

国家自然科学基金资助项目（51678547）；中央高校基本科研业务费专项资金资助项目（CUG170647）.
通讯作者: 吴文兵,男,副教授,博士.orcid.org/0000-0001-5473-1560.     E-mail: zjuwwb1126@163.com
作者简介: 梁荣柱(1988-),男,副研究员,博士,从事盾构隧道保护相关研究.orcid.org/0000-0002-2165-2062.E-mail:liangcug@163.com
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引用本文:

梁荣柱, 宗梦繁, 康成, 吴文兵, 方宇翔, 夏唐代, 程康. 考虑隧道剪切效应的隧道下穿对既有盾构隧道的纵向影响[J]. 浙江大学学报(工学版), 2018, 52(3): 420-430.

LIANG Rong-zhu, ZONG Meng-fan, KANG Cheng, WU Wen-bing, FANG Yu-xiang, XIA Tang-dai, CHENG Kang. Longitudinal impacts of existing shield tunnel due to down-crossing tunnelling considering shield tunnel shearing effect. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 2018, 52(3): 420-430.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2018.03.002    或    http://www.zjujournals.com/eng/CN/Y2018/V52/I3/420

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