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[1]于阳,孙雅珍,林志军,等.基坑开挖引起邻侧盾构隧道开裂特性研究*[J].中国安全生产科学技术,2021,17(10):99-105.[doi:10.11731/j.issn.1673-193x.2021.10.015]
　YU Yang,SUN Yazhen,LIN Zhijun,et al.Study on cracking characteristics of adjacent shield tunnel caused by foundation pit excavation[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2021,17(10):99-105.[doi:10.11731/j.issn.1673-193x.2021.10.015]
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基坑开挖引起邻侧盾构隧道开裂特性研究*
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
17
期数:
2021年10期
页码:
99-105
栏目:
职业安全卫生管理与技术
出版日期:
2021-10-31

文章信息/Info

Title:
Study on cracking characteristics of adjacent shield tunnel caused by foundation pit excavation
文章编号:
1673-193X(2021)-10-0099-07
作者:
于阳; 孙雅珍; 林志军; 王金昌; 叶友林
（1.沈阳建筑大学 土木工程学院，辽宁 沈阳 110168；
2.沈阳建筑大学 交通工程学院，辽宁 沈阳 110168；
3.中国电建集团华东勘测设计研究院有限公司，浙江 杭州 310058；
4.浙江大学 交通工程研究所，浙江 杭州 310058）
Author(s):
YU Yang;  SUN Yazhen;  LIN Zhijun;  WANG Jinchang;  YE Youlin
(1.School of Civil Engineering,Shenyang Jianzhu University,Shenyang Liaoning 110168,China;
2.School of Transportation Engineering,Shenyang Jianzhu University,Shenyang Liaoning 110168,China;
3.Power China Huadong Engineering Corporation Limited,Hangzhou Zhejiang 310058,China;
4.Institute of Transportation Engineering,Zhejiang University,Hangzhou Zhejiang 310058,China)
关键词:
基坑开挖; 隧道工程; 管片衬砌; 数值计算; 裂缝; 开裂机制
Keywords:
foundation pit excavation;  tunnel engineering;  segment lining;  numerical calculation;  crack;  cracking mechanism
分类号:
X951
DOI:
10.11731/j.issn.1673-193x.2021.10.015
文献标志码:
A
摘要:
为探究基坑开挖导致邻侧既有盾构隧道出现开裂破损而带来的不利影响，采用地层-结构法与荷载-结构法相结合的计算方法，同时考虑内置钢筋对混凝土的加强作用，精细化地模拟基坑开挖影响下，非连续盾构管片结构接头处裂缝的扩展过程，揭示其开裂机制。研究结果表明：基坑开挖过程中，管片衬砌“横鸭蛋”变形模式决定了其开裂范围，即左、右拱腰附近为主开裂区；管片的裂损特征为纵向裂缝，初始裂缝由左、右拱腰外弧面逐渐向两侧接头处延展，右拱腰接头处裂缝扩展连接为沿厚度方向的环状裂缝。
Abstract:
In order to explore the adverse effect of the cracking and damage of existing shield tunnel on the adjacent side due to the excavation of foundation pit,a calculation method combining the stratum-structure method and the load-structure method was adopted,and considering the reinforcement effect of the built-in steel bars on the concrete,the propagation process of the cracks at the joints of discontinuous shield segment structure under the influence of foundation pit excavation was finely simulated,and the cracking mechanism was revealed.The results showed that during the process of foundation pit excavation,the cracking range of the segment lining was determined by the ‘transverse duck egg’ deformation mode,i.e.the primary cracking area was near the left and right haunch.The cracks of segment were characterized by the longitudinal cracks,and the initial cracks gradually extended from the outer arc surface of the left and right haunch to the joints on both sides,while the cracks at the right haunch joint extended and connected into a circular crack along the thickness direction.

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备注/Memo

备注/Memo:
收稿日期： 2020-12-15
* 基金项目： 国家重点基础研究发展计划(973计划)项目(2015CB057801)；辽宁省自然科学基金项目（2018011666-301）
作者简介： 于阳，博士研究生，主要研究方向为盾构隧道结构非线性分析。
通信作者： 孙雅珍，博士，教授，主要研究方向为结构损伤机制。
更新日期/Last Update: 2021-11-03