多环盾构管片原型试验加载系统的研发和应用  

Development and Application of Test Loading System of Multi-ring Shield Segment Prototype

作　　者：魏纲 周鑫鑫 刘亚宇 黄时雨 冯非凡 WEI Gang;ZHOU Xinxin;LIU Yayu;HUANG Shiyu;FENG Feifan(Department of Civil Engineering,Zhejiang University City College,Hangzhou 310015;Key Laboratory of Safe Construction and Intelligent Maintenance for Urban Shield Tunnels of Zhejiang Province,Hangzhou 310015;College of Civil Engineering and Architecture,Zhejiang University,Hangzhou 310058;School of Civil Engineering,Shaoxing University,Shaoxing 312000;Yantai XTD Test Technology Co.Ltd,Yantai 264000)

机构地区：[1]浙大城市学院土木工程系,杭州310015 [2]浙江省城市盾构隧道安全建造与智能养护重点实验室,杭州310015 [3]浙江大学建筑工程学院,杭州310058 [4]绍兴文理学院土木工程学院,绍兴312000 [5]烟台新天地试验技术有限公司,烟台264000

出　　处：《现代隧道技术》2022年第4期176-186,共11页Modern Tunnelling Technology

基　　金：浙江省基础公益研究计划项目(LGF22E080012);杭州市农业与社会发展科研一般项目(20201203B127)。

摘　　要：为解决目前管片测试系统无法真实模拟盾构管片受力以及设备的可持续使用率较低等难题,通过前期对盾构隧道管片进行调研、理论计算、现场实测等,进一步对现有大型足尺管片试验进行改进,提出了新的盾构管片足尺试验加载方法,并研发了多环盾构管片原型试验加载系统。该系统以三环衬砌管片为试验对象,模拟中环管片在不同地面偏心堆载工况下的受力与变形。试验结果表明:随着偏心荷载的不断增大,管片的弯矩数值也不断增大;底部正弯矩区域范围是顶部正弯矩区域的2倍左右;管片的弯曲刚度有效率呈线性增大,而接头的弯矩传递系数不断减小,且管片在偏心荷载作用下,会发生整体偏移。To address the various problems related to shield segments, such as the impossibility of real simulation of the stress of shield segments with the extant segment testing system and the low sustainable utilization rate of equipment, this paper carries out preliminary research on and theoretical calculation and on-site measurement of shield tunnel segments with the objective to make further improvement to existing tests of large full-scale segments. This paper proposes a new full-scale test loading method for shield segments and innovatively develops a multi-ring prototype test loading system of shield segments. This system takes three-ring lining segments as the test subject and simulates the stress and deformation of the middle-ring segment under different working conditions of ground eccentric stacked loads. The test results show that the value of the bending moment of the segment increases with the increasing eccentric load, and the range of the positive bending moment region at the bottom is about twice the positive bending moment region at the top. Also, the efficiency of the bending stiffness of the segment increases linearly,while the bending moment transmission coefficient of the joint keeps decreasing, and the segment will be deflected as a whole under the eccentric load.

关 键 词：盾构管片 加载系统 多环足尺试验 偏心加载 

分 类 号：U455.43[建筑科学—桥梁与隧道工程]