苏通GIL综合管廊环间接头螺栓选型研究  

Study on bolt selection of circumferential joint in Su-Tong GIL Utility Tunnel

作　　者：黄常元 孙文昊[2,3] 涂新斌 刘浩 张晓阳[1] 谢俊 HUANG Chang-yuan;SUN Wen-hao;TU Xin-bin;LIU Hao;ZHANG Xiao-yang;XIE Jun(State Grid Cooperation of China,Beijing 100031,China;China Railway Siyuan Survey and Design Group Co.,Ltd.,Wuhan 430063,China;Laboratory of Underwater Tunnel Technology of Hubei Province,Wuhan 430063,China;State Grid Jiangsu Electric power Co.,Ltd.,Nanjing 210024,China)

机构地区：[1]国家电网有限公司,北京100031 [2]中铁第四勘察设计院集团有限公司,湖北武汉430063 [3]湖北省水下隧道技术工程实验室,湖北武汉430063 [4]国网经济技术研究院有限公司,北京100031

出　　处：《电力勘测设计》2020年第10期61-65,75,共6页Electric Power Survey & Design

基　　金：国家电网公司“穿越长江特高压电力隧道抗震性能及措施研究”专题项目(SHJJGC1700024)。

摘　　要：针对盾构隧道环间接头的选型问题进行研究,基于苏通GIL综合管廊工程,首先建立三维有限元动力分析模型,明确环间内力的分布特征,进而以此为依托设计了接头螺栓选型试验,采用足尺试验的方式对环间接头的破坏形式及承载极限进行研究,最终给出适用于本工程的螺栓型号。本文所得结论:纵向荷载激励下,隧道环间存在环间轴力,水平弯矩My及竖向弯矩Mz;且环间轴力远大于环间弯矩,说明隧道在纵向荷载激励下以纵向受拉为主。接头的破坏始于管片开裂,此时螺栓极限应力为672.2 MPa,超过8.8级机械强度螺栓屈服强度(640 MPa),小于10.9级机械强度螺栓屈服强度(900 MPa)。因此,本工程中有必要采用10.9级机械强度的M40螺栓。Based on the Su-Tong GIL Utility Tunnel,a three-dimensional finite element dynamic analysis model is established to determine the distribution characteristics of the internal force between the rings,and then based on this,the joint bolt selection test is designed,and the failure mode and bearing limit of the joint between the rings are studied by full-scale test,Finally,the bolt model suitable for this project is given.The conclusions of this paper are as follows:under the longitudinal load excitation,there are axial force between the rings,horizontal bending moment My and vertical bending moment MZ.And the axial force between the rings is far greater than the moment between the rings,which shows that the tunnel is mainly under horizontal tension under the longitudinal load excitation.At this time,the ultimate stress of bolt is 672.2mpa,which is higher than the yield strength of grade 8.8 mechanical strength bolt(640mpa)and lower than the yield strength of grade 10.9 mechanical strength bolt(900MPa).Therefore,it is necessary to use M40 bolt with mechanical strength of grade 10.9 in this project.

关 键 词：盾构隧道 环间接头 螺栓 选型 

分 类 号：TM726[电气工程—电力系统及自动化]