摘要
依托厦门地铁2号线区间隧道,采用相似模型试验和有限元数值模拟分析了隧道双侧卸载工况下结构的受力变形特征、破坏形式及损伤过程,得到盾构隧道管片错缝拼装结构在双侧卸载工况下的变形控制指标.结果表明,管片混凝土裂缝宽度达到设计允许值0.15 mm时的收敛变形值为3.29‰D(D为隧道直径);螺栓屈服时收敛变形值为10.67‰D,结构破坏形式表现为由管片开裂、螺栓屈服直到变形过大并垮塌.
Based on the engineering background of the Xiamen Metro Line 2 tunnel, the similar model test and the finite element numerical simulation were used. Aiming at the shield tunnel's unloading conditions on both sides, the transverse deformation characteristics, failure modes and segment damage process of tunnel were analyzed, and the stress mechanism and the key performance points of shield tunnel under unloading condition were obtained. The results show that: the convergent deformation value of segment concrete crack width 0.15 mm of design allowable value is 3.29‰D(D is the diameter of the tunnel);the vertical section of bolt failing to yield is 10.67‰D, the structural failure form is caused by segment cracking, bolt yielding to excessive deformation and collapse.
作者
刘学增
赖浩然
桑运龙
张强
张竹清
刘金栋
LIU Xuezeng;LAI Haoran;SANG Yunlong;ZHANG Qiang;ZHANG Zhuqing;LIU Jindong(Civil Engineering Information Technology Research Center of the Ministry of Education, Tongji Univers让y, Shanghai 200092, China;College of Civil *Engineering Tongji Univers让y, Shanghai 200092, China;Tongyan Civil Engineering Science and Technology Co.m Ltd., Shanghai 200092, China;Shanghai Engineering Reseach Center of Underground Infrastructure Detection and Maintenance Equipment, Shanghai 200092, China;Xiamen Rail Transit Group Limited Corporation, Xiamen 361008, China;Qingdao Yinshengtai Group Co., Ltd., Ji'nan 266000, China)
出处
《同济大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2019年第10期1398-1405,共8页
Journal of Tongji University:Natural Science
基金
厦门市科技计划重大项目(3502Z20151006)
国家“九七三”重点基础研究发展计划(2015CB057806)
国家电网公司科技项目(SHJJGC160053)
深圳市交通公用设施建设中心交通建设工程课题(20160318003B、20160318002B)
上海人才发展基金(2017055)
关键词
盾构隧道
卸载工况
相似模型试验
数值分析
变形特征
shield tunnel
unloading condition
similar model test
numerical analysis
deformation characteristics
