摘要
针对苏州轨道交通盾构隧道衬砌结构,采用拟静力的试验方法对超载工况下错缝拼装盾构隧道衬砌结构进行了足尺试验研究。介绍了试验方案设计,根据试验结果分析了结构变形、裂缝分布、破损情况、纵缝变形和纵缝螺栓应变的发展情况和结构破坏过程,并对结构的破坏机理进行了分析。试验结果表明:苏州轨道交通盾构隧道衬砌结构的破坏链为168.75°、101.25°和11.25°管片截面的纵缝螺栓相继屈服,纵缝受压侧混凝土相继压碎;最终导致270°截面管片钢筋屈服,4个塑性铰全部形成,结构整体失去稳定性。
Targeting the lining structure of Suzhou Rail Transit shield tunnel,adopting pseudo-static testing method,full-scale experiment is carried out studying staggered-jointed shield tunnel lining structure under overload working condition.Test scheme design is introduced.According to experiment results,the condition and development process of structural deformation,distribution of cracks and damages,open of longitudinal joints and strain of longitudinal joint bolts are analyzed,as well as the structure damage mechanism.Test results show that Suzhou Rail Transit shield tunnel lining structure is under the following process:segment sectional bolts seam and edge concrete crashed in sequence of longitudinal joint at 168.75°,101.25°and 11.25°.Finally,bending failure of tunnel segment at 270°appeared,which indicated four plastic hinges to appear and caused stability loss of the tunnel structure.
作者
查红星
桂林
秦奕旻
柳献
ZHA Hongxing;GUI Lin;QIN Yimin;LIU Xian(Suzhou Rail Transit Group Co.,Ltd.,215004,Suzhou,China;不详)
出处
《城市轨道交通研究》
北大核心
2022年第5期1-7,共7页
Urban Mass Transit
关键词
苏州轨道交通
盾构隧道
衬砌结构
足尺试验
Suzhou Rail Transit
shield tunnel
lining structure
full-scale experiment
作者简介
第一作者:查红星,高级工程师。
