盾构隧道通用环管片凹凸榫槽变形及接头抗剪性能研究  

Research on Deformation and Shear Performance of Convex-and-Concave Joint of Universal Ring Segment for Shield Tunnel

作　　者：黎翔 何剑光 吕计瑞 柴东然 罗春光 Li Xiang;He Jianguang;Lv Jirui;Chai Dongrang;Luo Chunguang(Beijing First Expressway Construction Management Co.,Ltd.,101125,China;CCCC Tunnel Engineering Bureau Co.,Ltd.,Beijing 100024,China)

机构地区：[1]北京市首发高速公路建设管理有限责任公司,101125 [2]中交隧道工程局有限公司,北京100024

出　　处：《特种结构》2024年第6期31-35,42,共6页Special Structures

基　　金：北京市首都公路发展集团有限公司科研项目(2021-4)。

摘　　要：凹凸榫槽对盾构隧道通用楔形管片环间接头变形及抗剪性能具有重要影响,但其设计尺寸及构造形式尚无统一标准。本文采用数值模拟方法,基于ABAQUS建立了混凝土管片-接头组合结构的三维数值模型,针对通用楔形管片凹凸榫槽的深度和角度对螺栓和混凝土受力、变形及接缝抗剪刚度的影响展开了系统系统分析。研究结果表明:与榫槽深度相比,榫槽角度对接缝抗剪刚度的影响更大;相同榫槽深度条件下,榫槽角度越大,螺栓竖向位移、横向应力越小,但纵缝抗剪刚度越大。在此基础上,针对盾构隧道凹凸榫槽尺寸进行了优化,并给出了依托工程管片接缝位置榫槽构造形式的建议。The concave-and-convex groove has a significant impact on the deformation and shear performance of the universal wedge-shaped segmental joint for shield tunnels,but there is no unified standard for its design dimensions and construction form yet.The numerical method was adopted in this paper,and a three-dimensional numerical model was established,including a composite structure consisting of concrete segments and joints based on ABAQUS.A systematic analysis was conducted on the influence of the depth and angle of the concave-and-convex groove of the universal wedge-shaped segment on the stress,deformation of bolts and concrete,as well as the joint shear stiffness.The results indicated that compared to the depth of concave-and-convex groove,the angle of groove had a greater impact on the shear stiffness of joints.Under the conditions of the same depth,the larger the groove angle,the smaller the vertical displacement and lateral stress of the bolt,but the greater the shear stiffness of the longitudinal joint.On this basis,optimization was carried out for the size of the concave-and-convex groove of the shield tunnel,and suggestions were given for the construction form of the concave-and-convex groove at the segmental joint for supported engineering.

关 键 词：盾构隧道 通用楔形管片 凹凸榫槽 抗剪刚度 变形规律 

分 类 号：U451.4[建筑科学—桥梁与隧道工程]