管片接头刚度对盾构隧道衬砌结构应力与变形的影响研究  

Influence of Segment Joint Stiffness on Stress and Deformation of Shield Tunnel Lining Structure

作　　者：胡雷[1] 窦发骞 朱永振 黄孝炜 王凯[2] Hu Lei;Dou Faqian;Zhu Yongzhen;Huang Xiaowei;Wang Kai(China Railway 19th Bureau Group Co.,Ltd.,Beijing 100176,China;China Railway 16th Bureau Group Co.,Ltd.,Beijing 100018,China)

机构地区：[1]中铁十九局集团有限公司,北京100176 [2]中铁十六局集团有限公司,北京100018

出　　处：《市政技术》2023年第3期81-86,共6页Journal of Municipal Technology

摘　　要：基于杭州市地铁8号线盾构隧道某区间衬砌结构工程,采用有限元法研究了管片接头刚度对盾构隧道衬砌结构应力与变形的影响。研究结果表明:地表最大位移值随着管片接头刚度折减系数的增加而减小;盾构隧道衬砌结构内、外环顶部的环向位移与拱顶、拱底和拱腰处的环向应力均随着管片接头刚度折减系数的增加而增大;管片接头刚度对盾构隧道衬砌结构变形和地表位移均有较大影响,可采用提高管片接头刚度的方法减小盾构隧道衬砌结构变形,并采用注浆的方法抬升地表,进而降低地层损失率。该研究成果可为类似工程提供参考。Based on the lining structure of a section of the shield tunnel of Hangzhou Metro Line 8,the influence of segment joint stiffness on the stress and deformation of the shield tunnel lining structure was studied by finite element method.The results show that the maximum ground displacement decreases with the increase of the segment joint stiffness reduction factor;The circumferential displacement at the top of the inner and outer rings of the shield tunnel lining structure and the circumferential stress at the top,bottom and waist of the arch increase with the increase of the segment joint stiffness reduction factor;The segment joint stiffness has a great impact on the deformation of the shield tunnel lining structure and the ground displacement.The deformation of the shield tunnel lining structure will be reduced by increasing the segment joint stiffness and the ground surface raised by grouting so that the formation loss rate can be reduced.The research results can provide reference for similar projects.

关 键 词：盾构 接头刚度 衬砌 变形 数值模拟 

分 类 号：U455.91[建筑科学—桥梁与隧道工程]