明-暗挖地铁车站框架结构接头刚度对抗震性能的影响研究  

Influence of Open-buried Excavation Metro Station Joint Stiffness on Seismic Per-formance

作　　者：袁勇[1,2] 蓝旭曌 徐正良 毕湘利[4] 李翀[1] YUAN Yong;LAN Xuzhao;XU Zhenliang;BI Xiangli;LI Chong(Department of Geotechnical Engineering,Tongji University,200092,Shanghai,China;不详)

机构地区：[1]同济大学地下建筑与工程系,上海200092 [2]同济大学土木工程防灾国家重点实验室,上海200092 [3]上海市城市建设设计研究总院,上海200125 [4]上海申通地铁集团有限公司,上海201103

出　　处：《城市轨道交通研究》2022年第8期170-175,203,共7页Urban Mass Transit

基　　金：上海申通地铁集团有限公司科研计划项目(JSKY17R031-10);国家自然科学基金国际(地区)合作与交流项目(52061135112);土木工程防灾国家重点实验室课题(SLDRCE19-A-13)。

摘　　要：上海轨道交通14号线静安寺站位于城市核心区,受限于周边运营设施与建筑保护需求,采用顶管结构衔接两侧明挖法框架结构式车站。该复合工法建设的车站结构存在刚度差异大,衔接方式对地震效应的影响未知等技术难题。为此开展了几何比尺1/20的结构振动台试验,研究该车站的抗震性能。试验结果表明:车站顶管与框架结构之间采用柔性连接时,地震波沿车站横向输入时顶管加速度峰值比纵向输入时大,框架结构质量较大的一端顶管加速度峰值较大;采用刚性连接时环缝张开量整体大于采用柔性连接的工况。已有理论分析较适用于柔性连接工况,当最大环缝张开量较小时,试验值相对理论值偏小。Jing′an Temple Station of Shanghai Metro Line 14 is located in urban core area.Due to the restriction of surrounding operating facilities and the demand for building protection,the station adopts a combined structure in which the pipe-jacking structures are connected to the cut-and-cover frame structures on both sides.However,the station structure constructed by the combined excavation method has technical problems such as large differences in stiffness and unknown seismic effects.Therefore,a shaking table test with a geometric scale of 1/20 is carried out to investigate the seismic performance of the station structure.Using the flexible connection,the peak accelerations of pipe-jacking structures when the seismic wave is input along the transverse direction of the station are larger than those along the longitudinal direction.The peak accelerations of pipe-jacking at the end with the larger mass is larger.Using rigid connection,the overall circumferential-joint extensions is larger than that of the flexible connection.The theoretical analysis is more suitable for flexible connection conditions.When the maximum circumferential-joint extension is small,the experimental value is smaller than the theoretical value.

关 键 词：地铁 车站 组合工法 结构抗震 振动台 

分 类 号：U442.55[建筑科学—桥梁与隧道工程] U231.4[交通运输工程—道路与铁道工程]