岩石场地群洞地铁车站联络通道地震响应分析
袁勇1李若舟2贺维国3李清菲3
Seismic Response Analysis of Link Passage in Rock Site Tunnel-group Metro Station
YUAN YongLI RuozhouHE WeiguoLI Qingfei
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作者信息:1.1.同济大学土木工程防灾国家重点实验室， 200092， 上海；
2.2.同济大学地下建筑与工程系， 200092， 上海；
3.3.中铁第六勘察设计院集团有限公司隧道设计分公司， 300308， 天津
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Affiliation:State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, 200092, Shanghai, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2022.08.041
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中图分类号/CLCN:TU435∶U231.4
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栏目/Col:其他
摘要:
以某交叠型群洞地铁车站为例，基于岩石场地，建立围岩群洞地铁车站相互作用体系的三维有限元模型，分析地震作用下车站的薄弱部位，研究站内联络通道连接处的地震响应。各联络通道连接处的结构横断面和刚度突变，是地下结构抗震的薄弱部位。研究结果表明：站厅隧道与站厅站台联络通道连接处的拱肩、站台站台联络通道与站台隧道连接处的拱底是抗震的薄弱部位；站台站台联络通道4的断面A处和站厅站台联络通道的下断面是结构受力的最不利部位；地震动频谱对隧道连接处内力响应有较大影响。
Abstracts:
Taking certain overlapping tunnel-group metro station as example, a three-dimensional finite element model of the interaction system between the surrounding rock and the tunnel-group metro station is established, focusing on the analysis of the station weak parts under seismic motion and the investigation of seismic response at link passage connecting part in station. The structure lateral section and stiffness sudden change at each link passage connecting part is demonstrating weak performance in underground structure seismic resistance. Results show that the spandrel at the connecting part between the hall tunnel and the hall-platform link passage, and the arch bottom at the connecting part between platform-platform link passage and platform tunnel are the weak part in aseismic performance. The section A of platform-platform link passage 4 and the lower section of hall-platform link passage is the unfavored part of structure bearing force. The ground motion spectrum has a great influence on the internal force response of tunnel connection.
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