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管片分块对钻爆法隧道装配式衬砌受力影响

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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.
INFLUENCE OF SEGMENT PARTITIONING ON THE STRUCTURAL PERFORMANCE OF DRILLED AND BLASTED TUNNEL LINING
To study the impact of different segmentations of tunnel rings on the load-bearing performance of prefabri-cated linings in drilled and blasted highway tunnels,this paper uses an experimental section of a highway tunnel proj-ect.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 indi-cate that as joint bending stiffness increases,the ring axial force slightly decreases,with the maximum axial force oc-curring at the arch foot.As the number of lining segments increases,the maximum axial force,maximum displace-ment,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.

drilling and blasting tunnelprefabricated lining structuresegment divisionjoint stiffness

张远明、陈坤、宋明

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中交第二公路勘察设计研究院有限公司,武汉 430056

钻爆法隧道 装配式衬砌结构 管片分块 接头刚度

2024

低温建筑技术
黑龙江省寒地建筑科学研究院

低温建筑技术

影响因子:0.237
ISSN:1001-6864
年,卷(期):2024.46(9)