盾构法联络通道T接部位受力特性测试研究  

Field measurement on the mechanical characteristics of the T-type intersection during the construction of shield-driven cross passage

作　　者：邓建林 何寨兵 李海波 周晔 黄强 朱瑶宏 胡威 DENG Jianlin;HE Zhaibing;LI Haibo;ZHOU Ye;HUANG Qiang;ZHU Yaohong;HU Wei(Hangzhou-Haining Intercity Railway Co.,Ltd.,Jiaxing 314499,China;The Second Engineering Co.,Ltd.of China Railway Fourth Bureau Group,Suzhou 215131,China;Institute of Geotechnical Engineering,Ningbo University,Ningbo 315211,China)

机构地区：[1]杭海城际铁路有限公司,浙江嘉兴314499 [2]中铁四局集团第二工程有限公司,江苏苏州215131 [3]宁波大学岩土工程研究所,浙江宁波315211

出　　处：《宁波大学学报（理工版）》2022年第6期22-27,共6页Journal of Ningbo University：Natural Science and Engineering Edition

基　　金：国家自然科学基金(52008214);宁波市科技计划公益项目(2019C50013).

摘　　要：利用混凝土应变计与土压计联合测试装置实测了不同施工阶段接收端主隧道与联络通道的管片弯矩、轴力及土压力.结果表明,不同施工工况下的T接部位内力变化存在显著差异,主隧道弯矩受施工过程的影响较环向轴力更为明显,而联络通道的内力变化规律则相反;台车就位和千斤顶顶撑作用对主隧道的内力影响较大,而管片切削过程的影响较小.The joint measurement device composed of concrete strain sensor and soil pressure sensor was utilized to measure the segmental inner forces of the receiving main tunnel and cross passage as well as the surrounding soil pressure.The measured results indicate that there are evident discrepancies between different construction stages.The segmental moment of the main tunnel is more prone to being affected by the construction than the circumferential axial force,while an opposite situation exists for the cross passage.Segmental inner forces are significantly influenced by the placement of construction trolley and the exertion of supporting load from the oil jack,however the segment cutting of the main tunnel has little effect on its inner force.

关 键 词：盾构法联络通道 T接部位 联络通道施工 现场测试 管片内力 土压力 

分 类 号：U456.3[建筑科学—桥梁与隧道工程]