• 中国科学引文数据库(CSCD)来源期刊
  • 中文核心期刊中文科技核心期刊
  • Scopus RCCSE中国核心学术期刊
  • 美国EBSCO数据库 俄罗斯《文摘杂志》
  • 《日本科学技术振兴机构数据库(中国)》
二维码

隧道建设(中英文) ›› 2015, Vol. 35 ›› Issue (2): 108-114.DOI: 10.3973/j.issn.1672-741X.2015.02.002

• 研究与探索 • 上一篇    下一篇

考虑收敛变形的通缝拼装盾构隧道纵向等效抗弯刚度计算分析

李成强1, 郭冰2, 李明宇3, 王志良4   

  1. (1. 中铁工程设计咨询集团有限公司交通分院, 河南 郑州 450000; 2. 河南东龙控股有限公司, 河南 郑州 450046; 3. 郑州大学土木工程学院, 河南 郑州 450001; 4. 昆明理工大学土木工程学院, 云南 昆明 650500)
  • 收稿日期:2014-10-20 修回日期:2014-11-20 出版日期:2015-02-20 发布日期:2015-02-11
  • 作者简介:李成强(1981— ),男,河南郑州人,2004年毕业于郑州大学,土木工程专业,本科,工程师,从事桥梁和隧道设计理论研究工作。
  • 基金资助:

    国家自然科学基金项目(50978235)

Computational Analysis on Longitudinal Equivalent Stiffness of Shield Tunnel with Straight Joints Considering Convergence Deformation

LI Chengqiang1, GUO Bing2, LI Mingyu3, WANG Zhiliang4   

  1. (1. Traffic Branch, China Railway Engineering Consulting Group Co., Ltd., Zhengzhou 450000, Henan, China; 2. Henan East Dragon Holdings Co., Ltd., Zhengzhou 450046, Henan, China; 3. School of Civil Engineering, Zhengzhou University, Zhengzhou 450001, Henan, China; 4. School of Civil Engineering, Kunming University of Science and Technology, Kunming 650500, Yunnan, China)
  • Received:2014-10-20 Revised:2014-11-20 Online:2015-02-20 Published:2015-02-11

摘要:

为了研究运营地铁通缝拼装盾构隧道长期沉降过程中衬砌结构横向变形对其纵向变形和受力的影响,基于上海轨道交通8号线西藏北路站—中兴路站运营盾构隧道现场试验监测数据,对等效连续化模型进行修正,考虑隧道收敛变形对结构纵向变形的影响,并将该计算方法与现有计算方法进行对比分析。结果表明: 1)弯曲状态下,环缝位置不考虑剪切作用时,随着隧道收敛变形的增加,拱底环缝张开量最大值、管片拉压应力和螺栓拉应力均略有减小。2)结构纵向变形曲率半径越小,隧道收敛变形对其影响越显著。3)在大曲率半径隧道结构纵向变形状态下,隧道收敛变形对结构纵向变形的影响可以忽略;不考虑轴向拉伸导致结构纵向变形条件下,结构弯曲导致的拱底环缝张开量较小。

关键词: 盾构隧道, 收敛变形, 纵向变形, 等效弯曲刚度, 椭圆方程

Abstract:

The shieldbored tunnel from North Tibet Road Station to Zhongxing Road Station on No. 8 Line of Shanghai Metro has straight segments joints. In the paper, the deformation of the lining structure of the shieldbored tunnel is monitored, the equivalent continuous model is modified, the influence of the tunnel convergence deformation on the longitudinal deformation of the lining structure is considered, and comparison and contrast is made between the calculation method with consideration of the convergence deformation and the existing calculation methods, so as to study the influence of the transverse deformation of the lining structure on the longitudinal deformation and stress of the lining structure during the operation of the Metro system. The results show that: 1) Under bending conditions, the maximum opening of the ring joints at the invert, the tensile stress and compression stress of the segments and the tensile stress of the bolts decrease as the tunnel convergence deformation increases, without considering the shear at the ring joints. 2) The influence of the tunnel convergence deformation on the lining structure increases as the curve radius decreases. 3) Under the condition of the longitudinal deformation of the tunnel structure with large curvature radius, the influence of the tunnel convergence deformation on the longitudinal deformation of the lining structure can be ignored; Without considering the longitudinal deformation of the lining structure induced by axial tensioning, the opening of the ring joints at the invert caused by the structure curvature is small .

Key words: shieldbored tunnel, convergence deformation, longitudinal deformation, equivalent bending stiffness, elliptic equation

中图分类号: