矩形顶管隧道F承插型接头等效刚度理论研究  

Theoretical study on equivalent stiffness of F-type socket joints in rectangular pipe jacking tunnels

作　　者：许有俊 张正曦[1] 张朝 刘天宇 张旭[1,2,3] XU Youjun;ZHANG zhengxi;ZHANG Chao;LIU Tianyu;ZHANG Xu(School of Civil Engineering,Inner Mongolia University of Science and Technology,Baotou 014010,China;Academician Workstation of Mine Safety and Underground Engineering,Inner Mongolia University of Science and Technology,Baotou 014010,China;Engineering Research Center of Urban Underground Engineering at Universities of Inner Mongolia Autonomous Region,Inner Mongolia University of Science and Technology,Baotou 014010,China)

机构地区：[1]内蒙古科技大学土木工程学院,内蒙古包头014010 [2]内蒙古科技大学矿山安全与地下工程院士专家工作站,内蒙古包头014010 [3]内蒙古科技大学内蒙古自治区高校城市地下工程技术研究中心,内蒙古包头014010

出　　处：《岩土工程学报》2025年第3期506-515,共10页Chinese Journal of Geotechnical Engineering

基　　金：国家自然科学基金项目(52168060)。

摘　　要：等效刚度是计算隧道纵向变形的重要参数,为探究等效刚度对矩形顶管隧道的影响,以呼和浩特市海亮广场矩形顶管隧道为设计参照,采用纵向变形等效原则,结合Timoshenko梁截面剪切系数,建立了矩形顶管隧道接头等效刚度解析解,以室内试验为验证,探究了等效刚度的影响因素。结果标明:(1)剪切作用下接头剪切刚度主要分为弹性阶段、屈服阶段、破坏阶段。(2)等效刚度理论计算结果与模型试验数据基本相同,验证了解析解的合理性。(3)减小管节宽度的同时增加管节高度可以有效增加接头等效刚度;截面尺寸对等效抗剪刚度影响较小,管节设计应将弯曲变形作为重点研究;钢套环与等效刚度成正比,与提升率呈反比,建议钢套环厚度取值13~17 mm。The equivalent stiffness is an important parameter for calculating the longitudinal deformation of tunnels.To explore the influences of the equivalent stiffness on the rectangular pipe jacking tunnel,taking the rectangular pipe jacking tunnel of Hailiang Square in Hohhot as the design reference,the analytical solution for the equivalent stiffness of the joint of the rectangular pipe jacking tunnel is established by using the equivalent principle of longitudinal deformation and the section shear coefficient of the Timoshenko beam.The laboratory experiments are used to explore the influence factors for the equivalent stiffness.The results show that:(1)Under the action of shear,the shear stiffness of the joint is mainly divided into elastic stage,yield stage and failure stage.(2)The theoretical results of the equivalent stiffness are nearly the same as the model experimental data,which verifies the rationality of the analytical solution.(3)Reducing the width and increasing the height of the pipe section can effectively increase the equivalent stiffness of the joint.The section size has small effects on the equivalent shear stiffness,and the bending deformation should be taken as the key research in the design of the pipe section.The steel sleeve ring is proportional to the equivalent stiffness and inversely proportional to the lifting rate.It is recommended that the thickness of the steel sleeve ring be 13~17 mm.

关 键 词：矩形顶管隧道 等效刚度 接头变形 参数分析 

分 类 号：U452[建筑科学—桥梁与隧道工程]