盾构隧道纵缝接头抗弯计算模型研究  

Study on calculation model of flexural behavior of shield segment joint

作　　者：陈必光[1,2] 陈卫忠[2] 郭小红[1] 

机构地区：[1]中交第二公路勘察设计研究院有限公司,湖北武汉430056 [2]中国科学院武汉岩土力学研究所,湖北武汉430071

出　　处：《岩石力学与工程学报》2016年第A01期2953-2959,共7页Chinese Journal of Rock Mechanics and Engineering

基　　金：交通部西部交通建设科技项目(2013 318 Q03 030)~~

摘　　要：针对不设传力衬垫的盾构隧道纵缝接头,基于已有的管片接头抗弯性能试验的结果,首次提出与接头应力相关的刚度折减系数的概念,并给出其取值经验的公式。在此基础上推导纵缝接头转角弯矩关系的显式解析公式,可直接应用于盾构隧道的结构受力分析。所推导的解析公式可以较好地反映接头轴力对其抗弯力学行为的影响,描述管片接头抗弯刚度随转角增大而减小直至破坏的整个过程。与管片接头足尺试验结果的对比表明,该解析解与试验结果吻合得较好,有重要的工程应用价值。A stress related stiffness reduction factor is firstly proposed to describe flexural behaviour of shield segment joint without packing material. An empirical formula of the factor is suggested based on the results of flexural tests. Explicit analytical solutions of moment-rotation relation for shield segment joint is derived, which can be directly used in structure analysis of shield segments. The suggested analytical solutions can reflect the influence of axial force on the flexural behaviour. The entire process that the flexural stiffness of segment joint decreases with increasing rotation angle until the destruction can be described well by the suggested analytical solutions. The comparison with full scale tests shows that the analytical solutions have good agreement with test results. Therefore, the analytical solutions suggested here may have great value in engineering.

关 键 词：隧道工程 盾构隧道 管片接头 抗弯性能 计算模型 

分 类 号：U45[建筑科学—桥梁与隧道工程]