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隧道建设(中英文) ›› 2025, Vol. 45 ›› Issue (S1): 104-112.DOI: 10.3973/j.issn.2096-4498.2025.S1.012

• 研究与探索 • 上一篇    下一篇

钢拱架锈蚀下二次衬砌力学演变机制研究

张艺腾1, 2, 田四明3, *, 王明年4, 马伟斌1, 2, 王志伟1, 2, 徐湉源1, 2, 张金龙1, 2   

  1. 1. 中国铁道科学研究院集团有限公司铁道建筑研究所, 北京 1000812. 高速铁路轨道系统全国重点实验室, 北京 1000813. 中国铁路经济规划研究院有限公司, 北京 100038 4. 西南交通大学土木工程学院, 四川 成都 610031)
  • 出版日期:2025-07-15 发布日期:2025-07-15
  • 作者简介:张艺腾(1992—),男,重庆合川人,2022年毕业于西南交通大学,桥梁与隧道工程专业,博士(博士后),助理研究员,主要从事隧道方面的科研与设计工作。E-mail: zytzytlvzq@163.com。*通信作者: 田四明, E-mail: tsmd@163.com。

Mechanical Evolution Mechanism of Secondary Lining Under Steel Arch Corrosion

ZHANG Yiteng1, 2, TIAN Siming3, *, WANG Mingnian4, MA Weibin1, 2, WANG Zhiwei1, 2, XU Tianyuan1, 2, ZHANG Jinlong1, 2   

  1. (1. Railway Engineering Research Institute, China Academy of Railway Sciences Group Co., Ltd., Beijing 100081, China; 2. State Key Laboratory for Track Technology of High-speed Railway, Beijing 100081, China; 3. China Railway Economic and Planning Research Institute Co., Ltd., Beijing 100038, China; 4. School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan, China)
  • Online:2025-07-15 Published:2025-07-15

摘要: 为获得海底隧道钢拱架锈蚀后二次衬砌荷载分担比演化规律,进而保障隧道长期安全性,依托某海底隧道建立考虑钢拱架锈蚀作用的初期支护-二次衬砌的三维实体荷载-结构模型,分析不同锈蚀程度下初期支护-二次衬砌间接触应力、二次衬砌安全性及荷载分担比变化规律。研究结果表明: 1)随着钢拱架锈蚀率由0%增加至60%,初期支护与二次衬砌的接触应力明显增加,拱顶、拱肩、边墙、拱脚、仰拱接触应力增幅分别为46%45.11%49%47.42%44%,相应二次衬砌安全系数呈下降趋势; 2)钢拱架锈蚀率从0%60%,二次衬砌荷载分担比由0.54增加至0.63,增幅达16.67% 3)综合考虑钢拱架锈蚀率、二次衬砌厚度、二次衬砌弹性模量3个因素,建立二次衬砌荷载分担比预测公式。

关键词: 海底隧道, 钢拱架锈蚀, 二次衬砌, 力学演变, 安全系数, 荷载分担比

Abstract: The evolution mechanism of load-sharing ratio of secondary lining under  steel arch frame corrosion of subsea tunnels is crucial for long-term safety of the tunnels. Herein, a three-dimensional solid load-structure model of the primary support-secondary lining under corrosion effect of the steel arch frame is established based on a subsea tunnel. The variation patters of the contact stress between the primary support and secondary lining, the safety of the secondary lining, and the load-sharing ratio under different corrosion degrees of steel arch frame are examined. The results indicate the following: (1) The contact stress between the primary support and secondary lining sharply increases as the corrosion rate of steel arch frame increases from 0% to 60%; the contact stress at the crown, arch shoulder, sidewall, arch foot, and invert increases by 46%, 45.11%, 49%, 47.42%, and 44%, respectively. The corresponding safety factor of the secondary lining shows a downward trend. (2) The load-sharing ratio of the secondary lining increases from 0.54 to 0.63, with an increase of 16.67%, as the corrosion rate of the steel arch frame increases from 0% to 60%. (3) A prediction formula for the load-sharing ratio of the secondary lining is established by comprehensively considering the corrosion rate of the steel arch frame, the thickness of the secondary lining, and the elastic modulus of the secondary lining.

Key words: subsea tunnel, steel arch corrosion, secondary lining, mechanical evolution, safety factor, load-sharing ratio