基于弯矩传递足尺试验的大直径地铁盾构隧道承插式管片环间传力性能研究
胡秋斌1师一鸣1曹伟飚2李文勇2柳献1
Force Transmission Performance between Socket-Type Segments Rings of Large-Diameter Shield Tunnel Based on Full-Scale Bending Moment Transfer Tests
HU Qiubin1SHI Yiming1CAO Weibiao2LI Wenyong2LIU Xian1
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作者信息:1.同济大学土木工程学院， 200092， 上海
2.上海申通地铁集团有限公司， 201102， 上海
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Affiliation:1.School of Civil Engineering, Tongji University, 200092, Shanghai, China
2.Shanghai Shentong Metro Group Co., Ltd., 201102, Shanghai, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2025.04.030
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中图分类号/CLCN:U452∶U455.43
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栏目/Col:研究报告
摘要:
［目的］采用双排连接件的大直径盾构隧道接头力学性能及环间传力性能更为复杂，故有必要针对采用双排快速连接件的错缝拼装承插式管片，开展管片弯矩传递足尺试验，对新型接头在大直径盾构隧道中力学性能开展研究。［方法］基于某大直径盾构隧道工程，开展了大盾构隧道承插式管片弯矩传递足尺试验，研究了双排布置快速连接件接头的管片环间传力性能，得到了弯矩传递系数等重要设计参数，分析了新型接头受力性能发展规律，探究了新型接头隧道纵向传力机理并开展影响因素分析。［结果及结论］采用新型接头的管片弯矩传递效应较好，错缝拼装方式纵缝接头转角刚度有所提高，充分发挥了管片本体的承载能力；随外荷载的增大，弯矩传递效应不断变化，弯矩传递系数是一个随外荷载不断变化的值；隧道纵向力增大，弯矩传递效应有所加强，纵向力对弯矩传递系数影响规律基本呈线性正相关关系。随隧道纵向力不断增大，纵缝接头转角刚度呈增大趋势，转角刚度与纵向力基本呈线性正相关关系。
Abstracts:
［Objective］ Since the mechanical properties and force transmission performance between rings of the large-diameter shield tunnel joints using double-row connectors are more complicated, it is necessary to carry out full-scale bending moment transfer tests on the staggered socket-type segments with double-row quick connectors, and to study the mechanical properties of new type joint in large-diameter shield tunnels. ［Method］ Based on a large-diameter shield tunnel project, full-scale bending moment transfer tests are conducted on socket-type segments in a large shield tunnel. The force transmission performance between segment rings with double-row quick connectors is investigated, and important design parameters such as the bending moment transfer coefficient are obtained. The force performance development law of the new type joint is analyzed, and the longitudinal force transmission mechanism of the tunnel with new type joints is explored, and the influencing factors are analyzed. ［Result & Conclusion］ The bending moment transfer effect of the pipe segment adopting new joints is better, the longitudinal joint angular stiffness of the staggered assembly method is improved, and the bearing capacity of the pipe segment body is fully utilized; with the increase of external load, the bending moment transfer effect changes continuously, and the bending moment transfer coefficient is a value changing continuously with the external load; with the increase of tunnel longitudinal force, the moment transfer effect is somewhat strengthened, and the influence of the longitudinal force on the moment transfer coefficient is basically linearly positively correlated. With the continuous increase of tunnel longitudinal force, the angular stiffness of the longitudinal joint increases, and the angular stiffness and the longitudinal force are basically linearly positively correlated.
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