| 强震作用下铁路隧道横通道交叉结构抗震措施研究 |
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| 引用本文： | 申玉生,陈政,周鹏发,罗宁宁,张熙,杨佳奇.强震作用下铁路隧道横通道交叉结构抗震措施研究[J].西北地震学报,2020,42(1):182-193. |
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| 作者姓名： | 申玉生 陈政 周鹏发 罗宁宁 张熙 杨佳奇 |
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| 作者单位： | 西南交通大学 交通隧道工程教育部重点实验室, 四川 成都 610031,贵州省交通规划勘察设计研究院股份有限公司, 贵州 贵阳 550081,西南交通大学 交通隧道工程教育部重点实验室, 四川 成都 610031,中铁五局集团 成都工程有限责任公司, 四川 成都 610073,西南交通大学 交通隧道工程教育部重点实验室, 四川 成都 610031,西南交通大学 交通隧道工程教育部重点实验室, 四川 成都 610031 |
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| 基金项目： | 国家自然科学基金（51778540，51678501）；“十三五”国家重点研发计划（2016YFB1200401） |
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| 摘 要： | 依托四川茂县跃龙门铁路隧道工程,以主线单线隧道与横通道正交结构为研究对象,通过ABAQUS建立有限元分析模型。选取El-Centro地震波数据,通过应用扩展有限元理论,对横通道与主隧道交叉结构在最不利地震条件下的裂损进行研究,并提出减震层结合柔性接头的抗震措施。研究分析得到:减震层结合柔性接头的设置减小并抑制了交叉结构隧道在强震作用下的开裂范围。柔性接头的设置阻止了纵向裂缝的扩展,在交叉口处中部设置环向柔性接头能完全阻止交叉部位拱顶的裂缝生成;在初期支护和二次衬砌之间设置减震层,给予衬砌更大变形空间,使二次衬砌不易受初期支护变形受力影响而开裂。
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| 关 键 词： | 铁路隧道 混凝土裂损 减震层 柔性接头 横通道 |
| 收稿时间： | 2018/6/10 0:00:00 |
Anti-seismic Measures for a Cross Structure between a RailwayTunnel and a Cross Passage under Strong Earthquakes |
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| SHEN Yusheng,CHEN Zheng,ZHOU Pengf,LUO Ningning,ZHANG Xi and YANG Jiaqi.Anti-seismic Measures for a Cross Structure between a RailwayTunnel and a Cross Passage under Strong Earthquakes[J].Northwestern Seismological Journal,2020,42(1):182-193. |
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| Authors: | SHEN Yusheng CHEN Zheng ZHOU Pengf LUO Ningning ZHANG Xi and YANG Jiaqi |
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| Institution: | Key Laboratory of Transportation Tunnel Engineeringof the Ministry of Education, SouthwestJiaotong University, Chengdu 610031, Sichuan, China,Guizhou Transportation Planning Surveyand Design Academy Co., Ltd., Guiyang 550081, Guizhou, China,Key Laboratory of Transportation Tunnel Engineeringof the Ministry of Education, SouthwestJiaotong University, Chengdu 610031, Sichuan, China,Chengdu Engineering Co., Ltd., China Railway Bureau 5 Group, Chengdu 610073, Sichuan, China,Key Laboratory of Transportation Tunnel Engineeringof the Ministry of Education, SouthwestJiaotong University, Chengdu 610031, Sichuan, China and Key Laboratory of Transportation Tunnel Engineeringof the Ministry of Education, SouthwestJiaotong University, Chengdu 610031, Sichuan, China |
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| Abstract: | With the orthogonal structure between the main tunnel and a cross passage as the analytic target, a finite element analysis model was established by ABAQUS based on the engineering of the Yuelongmen railway tunnel in Maoxian county, Sichuan Province, China. Selecting El-Centro seismic wave data and applying the extended finite element theory, crack damage of the cross structure between the cross passage and main tunnel under the most severe earthquake conditions was studied. Seismic resistant measures of the shock absorption layer combined with a flexible joint are presented. Research and analytical results showed that the combination of a shock absorption layer and flexible connectors reduced and restrained the crack range of the cross structure tunnel under a strong earthquake. Installation of flexible connectors prevented the extension of longitudinal cracks. A circular flexible connector in the middle of the intersection completely prevented the formation of cracks in the arch of the intersection. Installation of a shock absorption layer between the initial support and secondary lining gave more deformation space to the lining. Also, the secondary lining was not readily affected by the initial support deformation and cracking. |
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| Keywords: | railway tunnel concrete cracking shock absorption layer flexible connectors cross passage |
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