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隧道建设(中英文) ›› 2016, Vol. 36 ›› Issue (3): 288-294.DOI: 10.3973/j.issn.1672-741X.2016.03.007

• 研究与探索 • 上一篇    下一篇

湛江湾跨海盾构隧道管片变形与受力分析

林伟波1, 杨小平1, 严振瑞2, 李孟1, 刘庭金1,3,*   

  1. (1. 华南理工大学土木与交通学院, 广东 广州 510640; 2. 广东省水利电力勘测设计研究院,广东 广州 510635; 3. 华南理工大学亚热带建筑科学国家重点实验室, 广东 广州 510640)
  • 收稿日期:2015-09-22 修回日期:2015-11-14 出版日期:2016-03-20 发布日期:2016-03-30
  • 作者简介:林伟波(1991—),男,广东兴宁人,华南理工大学岩土工程专业在读硕士,研究方向为地铁结构等的静动力特性分析。Email: 465091317@qq.com。*通讯作者: 刘庭金,Email: liu_tingjin@163.com。
  • 基金资助:

    华南理工大学亚热带建筑科学国家重点实验室自主研究课题项目(2016KB16)

Analysis of Deformation and Stress of Segment of  Zhanjiang Bay Seacrossing Shield Tunnel

LIN Weibo1, YANG Xiaoping1, YAN Zhenrui2, LI Meng1, LIU Tingjin1,3,*   

  1. (1. School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510640,  Guangdong, China; 2. Guangdong Hydropower Planning & Design Institute, Guangzhou 510635,  Guangdong, China; 3. State Key Laboratory of Subtropical Building Science, South China University  of Technology, Guangzhou 510640, Guangdong, China)
  • Received:2015-09-22 Revised:2015-11-14 Online:2016-03-20 Published:2016-03-30

摘要:

以湛江湾跨海盾构隧道工程为背景,应用数值分析方法,建立了单环衬砌结构的三维有限元精细模型,研究了在不同水头作用下单环管片结构以及接缝部位的变形情况。采用修正惯用法得出在最大水头作用下管片结构的内力分布,由此推算出管片内、外侧的环向钢筋应力,并与现场的应力监测数据进行对比。研究表明: 1)高水压作用下,单环管片衬砌的变形呈现“横鸭蛋形”,且管片结构变形和接缝张开量均与外水压力变化呈线性关系; 2)作用水头每增加10 m,衬砌结构中各接缝张开量绝对值约增加0.5 mm; 3)采用修正惯用法计算得到的钢筋应力与实测结果较为吻合,较好地反映了隧道管片的实际受力状态。

关键词: 跨海盾构隧道, 高水压, 管片变形, 管片受力, 三维有限元精细模型, 修正惯用法

Abstract:

A fine threedimensional finite element model of a segment ring lining structure is established by means of numerical simulation and on the basis of construction of Zhanjiang Bay seacrossing shield tunnel. The deformation of a segment ring and the segment joint are studied under the effect of different water heads. The modified routine method is adopted to analyze the stress distribution of segment structure under the maximum water head. The circumferential reinforcement stresses of inner and outer segment are calculated and compared with monitoring data. The results show that: 1) Under high water pressure, the single segment ring is deformed into “horizontal ellipse” shape; and the segment structure deformation and joint opening have a linear relation with variations of waterpressure. 2) The absolute joint opening increases by 0.5 mm when the water head increases by 10 m. 3) The reinforcement stress calculated by means of modified routine method is consistent with the monitoring data, so as to reflect the actual force situation of tunnel segment quite well.

Key words: seacrossing shield tunnel, high water pressure, segment deformation, stress on segment, fine threedimensional finite element model, modified routine method

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