管片分块对钻爆法隧道装配式衬砌受力影响  

INFLUENCE OF SEGMENT PARTITIONING ON THE STRUCTURAL PERFORMANCE OF DRILLED AND BLASTED TUNNEL LINING

作　　者：张远明 陈坤[1] 宋明 ZHANG Yuanming;CHEN Kun;SONG Ming(CCCC Second Highway Consultant Co.,Ltd.,Wuhan 430056,China)

机构地区：[1]中交第二公路勘察设计研究院有限公司,武汉430056

出　　处：《低温建筑技术》2024年第9期81-85,共5页Low Temperature Architecture Technology

摘　　要：为研究管片分块不同对钻爆法公路隧道装配式衬砌受力性能的影响,文中以某高速公路隧道项目试验段为依托,通过建立隧道结构的有限元模型,分析不同管片分块、不同管片接头刚度对装配式衬砌结构受力性能的影响。结果表明随着接头抗弯刚度增大,管片轴力略有降低,最大轴力出现在拱脚部位;随着衬砌管片分块数增大,最大轴力、最大位移和最大转角均有所增大,最大正/负弯矩略有减小;管片接缝截面均处于受压状态时,对结构受力及接缝防水均较为有利。研究可为类似工程的衬砌受力性能分析提供参考。To study the impact of different segmentations of tunnel rings on the load-bearing performance of prefabricated linings in drilled and blasted highway tunnels,this paper uses an experimental section of a highway tunnel project.By establishing a finite element model of the tunnel structure,the study analyzes how different segmentations of tunnel rings and varying joint stiffness affect the structural performance of the prefabricated lining.The results indicate that as joint bending stiffness increases,the ring axial force slightly decreases,with the maximum axial force occurring at the arch foot.As the number of lining segments increases,the maximum axial force,maximum displacement,and maximum rotation increase,while the maximum positive/negative bending moments slightly decrease.The joint sections are generally under compression,which is beneficial for structural performance and joint waterproofing.The research provides a reference for analyzing the load-bearing performance of linings in similar projects.

关 键 词：钻爆法隧道 装配式衬砌结构 管片分块 接头刚度 

分 类 号：TU942[建筑科学—建筑技术科学]