穿越断层破碎带隧道设置减震层的振动台模型试验
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摘要
以某高地震烈度区穿越断层破碎带的铁路隧道工程为依托,开展设置减震层的振动台物理模型试验,介绍试验方案及过程,包括试验装置、试验内容、模型相似比、模型箱体设计、相似材料、测试方案及传感器布置、地震波输入及加载制度等,并对设置减震层的减震效果进行分析。试验结果表明:对高地震烈度区穿越断层破碎带隧道振动台模型试验的设计方案合理可行,设置减震层是一种降低地震荷载作用下衬砌的内力峰值,提高隧道抗震性能的有效手段。
A railway tunnel in high seismic intensity region was selected as the prototype to conduct shaking table test.The whole test scheme and process,including the test facility,experimental contents,the similarity ratio of model,the design of model box,the similarity materials,the layout of measure sensors and test scheme,the wave input and the load subsequence,were introduced systematically.The effects of vibration-absorption layer in the test were also analyzed.Test results show that the design scheme of shaking table test is reasonable and feasible for the tunnel in the high seismic intensity zone through fault.Setting shock absorption layer for tunnels is an effective means which could reduce the peak internal force of lining under seismic load and improve earthquake resistant capability of tunnel.
A railway tunnel in high seismic intensity region was selected as the prototype to conduct shaking table test.The whole test scheme and process,including the test facility,experimental contents,the similarity ratio of model,the design of model box,the similarity materials,the layout of measure sensors and test scheme,the wave input and the load subsequence,were introduced systematically.The effects of vibration-absorption layer in the test were also analyzed.Test results show that the design scheme of shaking table test is reasonable and feasible for the tunnel in the high seismic intensity zone through fault.Setting shock absorption layer for tunnels is an effective means which could reduce the peak internal force of lining under seismic load and improve earthquake resistant capability of tunnel.
引文
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[2]HE Chuan,GENG Ping,YAN Qixiang.Seismic damage oftunnels in the great Wenchuan earthquake[C]//Proceedings ofInternational Conference on Earthquake Engineering.Chengdu:Southwest Jiaotong University Press,2009:563-567.
[3]Song C M,Wolf J P.Dynamic stiffness of unbounded mediumbased on damping-solvent extraction[J].Earthquake Engineeringand Structural Dynamics,1994,23(2):169-181.
[4]Kaneshiro J Y,Power M.Empirical correlations of tunnelperformance during earthquakes and aseismic aspects of tunneldesign[C]//Proceedings of conference on lessons learned fromrecent earthquakes.Turkey,1999:461-480.
[5]Youssef M H,Jeffray J H,Birger S,et al.Seismic design and analysis of underground structures[J].Tunneling andUnderground Space Technology,2001,16(4):247-293.
[6]Goto Y,Matsuda Y,Ejiri J,et al.Influence of distance betweenjuxtaposed shield tunnels on their seismicresponses[C]//Proceedings of 9th World Conference onEarthquake Engineering.Tokyo-Kyoto,Japan,1988:569-574.
[7]HE Chuan,Koizumi A.Study on seismic behavior and seismicdesign methods in transverse direction of shield tunnels[J].Structural Engineering and Mechanics,2001,11(6):651-662.
[8]申玉生,高波,王英学.强震区山岭隧道洞口段结构动力特性分析[J].岩石力学与工程学报,2009,5,28(1):3131-3136.SHENG Yusheng,GAO Bo,WANG Yingxue.Structuraldynamic properties analysis for portal part of mountain tunnel instrong earthquake area[J].Chinese Journal of Rock Mechanicsand Engineering,2009,5,28(1):3131-3136.
[9]申玉生,高波,王峥峥.强震区山岭隧道振动台模型试验破坏形态分析[J].工程力学,2009,26(1):6266.SHENG Yusheng,GAO Bo,WANG Zhengzheng.Failure modeanalysis of mountain tunnel shake table Test in high-intensityearthquake area[J].Engineering Mechanics,2009,26(1):62-66.
[10]杨林德,王国波,郑永来,等.地铁车站结构振动台试验及地震响应的三维数值模拟[J].岩石力学与工程学报,2007,26(8):1538-1545.YANG Linde,WANG Guobo,ZHENG Yonglai,et al.Shakingtable test on metro station structure and 3D simulation of seismicresponse[J].Chinese Journal of Rock Mechanics andEngineering,2007,26(8):1538-1545.
[11]杨林德,季倩倩,郑永来,等.软土地铁车站结构的振动台试验[J].现代隧道技术,2003,40(1):711.YANG Linde,JI Qianqian,ZHENG Yonglai,et al.Shaking tabletest on metro station structures in soft soil[J].Modern TunnellingTechnology,2003,40(1):7-11.
[12]陈国兴,王志华,左熹.振动台试验叠层剪切型土箱的研制[J].岩土工程学报,2010,32(1):89-97.CHEN Guoxing,WANG Zhihua,ZUO Xi,et al.Development oflaminar shear soil container for shaking table tests[J].ChineseJournal of Geotechnical Engineering,2010,32(1):89-97.
[13]李育枢,李天斌,王栋,等.黄草坪2#隧道洞口段减震措施的大型振动台模型试验研究[J].岩石力学与工程学报,2009,28(6):1128-1135.LI Yushu,LI Tianbin,WANG Dong,et al.Large-scale shakingtable test for vibration-absorption measures of portal section ofHuangcaoping tunnel No.2[J]Chinese Journal of RockMechanics and Engineering,2009,28(6):1128-1135.
[14]李育枢,李天斌,王栋,等.山岭偏压隧道洞口段大型振动台模型试验方案设计[J].铁道建筑,2009(8):61-65.LI Yushu,LI Tianbin,WANG Dong,et al.The scheme design oflarge-scale shaking table test for portal section of unsymmetricaltunnel[J].Railway Engineering,2009(8):61-65.
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