理论与试验研究

服役期盾构管片极限承载力足尺试验研究

  • 冉家驹 ,
  • 谢治天 ,
  • 牛晓凯 ,
  • 郭锦鹏 ,
  • 宋立鸿
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  • 1.北京市市政工程研究院, 北京 100037;
    2.北京市市政工程研究院 地下工程建设预报预警北京市重点实验室, 北京 100037;
    3.北京交通大学 土木建筑工程学院,北京 100044
冉家驹(2001—),男,贵州铜仁人,硕士生,从事地下工程领域的科研工作。E-mail:1429045886@qq.com
谢治天(1992—),男,河北张家口人,博士,助理研究员,从事地下工程领域的科研工作。E-mail:1097235285@qq.com

收稿日期: 2025-09-13

  网络出版日期: 2026-06-23

基金资助

国家自然科学基金(52372020)

Full-Scale Loading Test on Ultimate Bearing Capacity of Shield Segment during Service Period

  • Ran Jiaju ,
  • Xie Zhitian ,
  • Niu Xiaokai ,
  • Guo Jinpeng ,
  • Song Lihong
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  • 1. Beijing Municipal Engineering Research Institute, Beijing 100037, P. R. China;
    2. Beijing Key Laboratory of Underground Engineering Construction Prediction & Precaution, Beijing 100037, P. R. China;
    3. School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, P. R. China

Received date: 2025-09-13

  Online published: 2026-06-23

摘要

为了研究服役期盾构隧道管片的极限承载性能,进行了足尺试验研究。以3环服役期管片为试验对象,拟定了试验测试内容及加载方案。对管片进行了三阶段加载,模拟上部堆载作用下的静力加载试验,监测了加载过程中管片的整体收敛变形、环缝错台,纵缝张开量以及管片裂缝,分析了中环管片整体的受力过程、破坏模式和极限承载力。结果表明:管片模拟在15 m埋深下,整体结构变形极小;管片的变形分为3个阶段,当拱顶底的相对位移超过2.83‰D时,管片整体收敛变形快速增加;管片破坏裂缝主要集中在螺栓孔及纵缝边缘处。

本文引用格式

冉家驹 , 谢治天 , 牛晓凯 , 郭锦鹏 , 宋立鸿 . 服役期盾构管片极限承载力足尺试验研究[J]. 地下空间与工程学报, 2026 , 22(3) : 813 -821 . DOI: 10.20174/j.JUSE.2026.03.07

Abstract

To investigate the ultimate bearing capacity of shield tunnel segments during service, a full-scale experimental investigation was conducted. Using three rings of service-aged segments as test subjects, the experimental testing content and loading scheme were formulated. The segments underwent three-stage loading to simulate static loading tests under overburden pressure, with monitoring of overall convergence deformation, joint misalignment, longitudinal joint opening, and segment cracks during the loading process. The stress distribution, failure modes, and ultimate bearing capacity of the middle ring segments were analyzed. The results indicate that under a simulated burial depth of 15 m, the overall structural deformation of the segments was minimal. The deformation of the segments was divided into three stages, with rapid increases in overall convergence deformation when the relative displacement between the crown and invert exceeded 2.83‰D. The failure cracks in the segments were primarily concentrated around the bolt holes and longitudinal joint edges.

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