嘎隆拉隧道洞口段地震响应大型振动台模型试验研究
|
摘要
洞口段为隧道抗震关键位置,极其容易发生地基失效及结构破坏。通过对嘎隆拉隧道洞口段轴向100 m开展大型振动台模型试验研究,研究结果表明:土体对其卓越频率附近的地震波有明显的放大作用,对地震波高频部分有滤波作用;地震时隧道与土体同步振动,不表现出自身的固有振动频率,惯性力对地下结构地震反应影响不大,故隧道抗震研究的重点是地震下围岩的失效防治,结构抗震设计主要目的是减小围岩失效对隧道产生的破坏;减震层和抗震缝的设置都不会改变结构地震反应的频谱特性,但设置减震层后,结构的峰值加速度增加,加速度放大系数不能作为减震效果的评判依据。研究成果对隧道的抗震设计和减震设计有重要工程应用价值。
As the key position of tunnel seismic design,the portal section is extremely vulnerable to foundation failure and structure damage.The longitudinal distances of 100 m in portal section of Galongla tunnel are selected as the prototype to conduct large-scale shaking table test.The research results are shown as follows:(1) The soil around tunnel has obvious amplification effect on the input seismic waves with the frequency near the predomination frequency of soil;and also it has filtering effect on the input seismic waves with high frequency.(2) The tunnel vibrates synchronously with the surrounding soil;and it doesn?t show its own natural vibration frequency.The inertial force has little effect on underground structure?s seismic response.So the key point of tunnel?s anti-seismic research is failure prevention of surrounding rock under the earthquake;and the main purpose of structure?s aseismic design is to reduce the structure damage from the failure of its surrounding rock.(3) The absorbers and aseismatic joints don?t change the spectrum characteristics of lining;but they can increase the peak acceleration of lining.So,the damping effect should not be judged by the acceleration magnified coefficient at these places.The research results have important application value to aseismic design and shock absorption design of tunnel.
As the key position of tunnel seismic design,the portal section is extremely vulnerable to foundation failure and structure damage.The longitudinal distances of 100 m in portal section of Galongla tunnel are selected as the prototype to conduct large-scale shaking table test.The research results are shown as follows:(1) The soil around tunnel has obvious amplification effect on the input seismic waves with the frequency near the predomination frequency of soil;and also it has filtering effect on the input seismic waves with high frequency.(2) The tunnel vibrates synchronously with the surrounding soil;and it doesn?t show its own natural vibration frequency.The inertial force has little effect on underground structure?s seismic response.So the key point of tunnel?s anti-seismic research is failure prevention of surrounding rock under the earthquake;and the main purpose of structure?s aseismic design is to reduce the structure damage from the failure of its surrounding rock.(3) The absorbers and aseismatic joints don?t change the spectrum characteristics of lining;but they can increase the peak acceleration of lining.So,the damping effect should not be judged by the acceleration magnified coefficient at these places.The research results have important application value to aseismic design and shock absorption design of tunnel.
引文
[1]蒋树屏.“主动洞”的减震作用研究[C]//中国科协第十一届年会19分会场论文集.北京:人民交通出版社,2009:447–454.(JIANG Shuping.Study of damping effect based on“voluntary tunnel”[C]//Proceedings of the 19th Session of the Eleventh Annual Meeting of China Association for Science.Beijing:China Communications Press,2009:447–454.(in Chinese))
[2]周德培,张建经,汤涌.汶川地震中道路边坡工程震害分析[J].岩石力学与工程学报,2010,29(3):565–576.(ZHOU Depei,ZHANG Jianjing,TANG Yong.Seismic damage analysis of road slopes in Wenchuan earthquake[J].Chinese Journal of Rock Mechanics and Engineering,2010,29(3):565–576.(in Chinese))
[3]林国进.汶川地震四川公路隧道震害调查及分析[C]//汶川地震公路抗震技术文集.成都:四川人民出版社,2010:155–165.(LIN Guojin.Damage investigation and analysis of tunnel in Sichuan in Wenchuan earthquake[C]//Proceedings of Highway Seismic Technology in Wenchuan Earthquake.Chengdu:Sichuan People′s Publishing House,2010:155–165.(in Chinese))
[4]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,2009,28(1):3 131–3 136.(SHEN Yusheng,GAO Bo,WANG Yingxue.Structural dynamic properties analysis for portal part of mountain tunnel in strong earthquake area[J].Chinese journal of Rock Mechanics and Engineering,2009,28(1):3 131–3 136.(in Chinese))
[5]朱长安,高波,索然绪.强震区隧道洞口段减震的振动台模型试验[J].公路,2008,6(6):211–215.(ZHU Chang′an,GAO Bo,SUO Ranxu.Shock absorbing shaking table test on portal part of tunnel in strong ground motion zone[J].Highway,2008,6(6):211–215.(in Chinese))
[6]徐光兴,姚令侃,高召宁,等.边坡动力特性与动力响应的大型振动台模型试验研究[J].岩石力学与工程学报,2008,27(3):624–632.(XU Guangxing,YAO Lingkan,GAO Zhaoning,et al.Large-scale shaking table model test study on dynamic characteristics and dynamic responses of slope[J].Chinese Journal of Rock Mechanics and Engineering,2008,27(3):624–632.(in Chinese))
[7]杨林德,季倩倩,郑永来.软土地铁车站结构的振动台模型试验[J].现代隧道技术,2003(,1):7–11.(YANG Linde,JI Qianqian,ZHENG Yonglai.Shaking table test on metro station structures in soft soil[J].Modern Tunnelling Technology,2003,(1):7–11.(in Chinese))
[8]陈国兴,庄海洋,程绍革,等.土–地铁隧道动力相互作用的大型振动台试验:试验方案设计[J].地震工程与工程振动,2006,26(6):178–183.(CHEN Guoxing,ZHUANG Haiyang,CHENG Shaoge,et al.A large-scale shaking table test for dynamic soil-metro tunnel interaction:test scheme[J].Earthquake Engineering and Engineering Vibration,2006,26(6):178–183.(in Chinese))
[9]陈国兴,庄海洋,杜修力,等.土–地铁隧道动力相互作用的大型振动台试验——试验结果分析[J].地震工程与工程振动,2007,27(1):164–170.(CHEN Guoxing,ZHUANG Haiyang,DU Xiuli,et al.A large-scale shaking table test for dynamic soil-metro tunnel interaction—analysis of test results[J].Earthquake Engineering and Engineering Vibration,2007,27(1):164–170.(in Chinese))
[10]张敏政.地震模拟试验中相似律应用的若干问题[J].地震工程与工程振动,1997,17(2):52–58.(ZHANG Minzheng.Study on similitude laws for shaking table tests[J].Earthquake Engineering and Engineering Vibration,1997,17(2):52–58.(in Chinese))
[11]蒋良潍,姚令侃,王建.基于振动性态和破坏相似的边坡振动台模型试验相似律[J].交通科学与工程,2009,25(2):2–7.(JIANG Liangwei,YAO Lingkan,WANG Jian.Similitude for shaking table model test on side slope relating to dynamic characteristics and strength[J].Journal of Transport Science and Engineering,2009,25(2):2–7.(in Chinese))
[12]杨俊杰.相似理论与结构模型试验[M].武汉:武汉理工大学出版社,2005:38–46.(YANG Junjie.Similarity theory and structure model test[M].Wuhan:Wuhan University of Technology Press,2005:38–46.(in Chinese))
[13]中华人民共和国行业标准编写组.JTG D70—2004公路隧道设计规范[S].北京:人民交通出版社,2004:9.(The Professional Standards Compilation Group of People′s Republic of China.JTG D70—2004 Code for design of road tunnel[S].Beijing:China Communications Press,2004:9.(in Chinese))
[14]杨林德,季倩倩,郑永来,等.地铁车站结构振动台试验中模型箱设计的研究[J].岩土工程学报,2004,26(1):75–78.(YANG Linde,JI Qianqian,ZHENG Yonglai,et al.Study of design of test box in shaking table test for subway station structure in soft soil[J].Chinese Journal of Geotechnical Engineering,2004,26(1):75–78.(in Chinese))
[2]周德培,张建经,汤涌.汶川地震中道路边坡工程震害分析[J].岩石力学与工程学报,2010,29(3):565–576.(ZHOU Depei,ZHANG Jianjing,TANG Yong.Seismic damage analysis of road slopes in Wenchuan earthquake[J].Chinese Journal of Rock Mechanics and Engineering,2010,29(3):565–576.(in Chinese))
[3]林国进.汶川地震四川公路隧道震害调查及分析[C]//汶川地震公路抗震技术文集.成都:四川人民出版社,2010:155–165.(LIN Guojin.Damage investigation and analysis of tunnel in Sichuan in Wenchuan earthquake[C]//Proceedings of Highway Seismic Technology in Wenchuan Earthquake.Chengdu:Sichuan People′s Publishing House,2010:155–165.(in Chinese))
[4]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,2009,28(1):3 131–3 136.(SHEN Yusheng,GAO Bo,WANG Yingxue.Structural dynamic properties analysis for portal part of mountain tunnel in strong earthquake area[J].Chinese journal of Rock Mechanics and Engineering,2009,28(1):3 131–3 136.(in Chinese))
[5]朱长安,高波,索然绪.强震区隧道洞口段减震的振动台模型试验[J].公路,2008,6(6):211–215.(ZHU Chang′an,GAO Bo,SUO Ranxu.Shock absorbing shaking table test on portal part of tunnel in strong ground motion zone[J].Highway,2008,6(6):211–215.(in Chinese))
[6]徐光兴,姚令侃,高召宁,等.边坡动力特性与动力响应的大型振动台模型试验研究[J].岩石力学与工程学报,2008,27(3):624–632.(XU Guangxing,YAO Lingkan,GAO Zhaoning,et al.Large-scale shaking table model test study on dynamic characteristics and dynamic responses of slope[J].Chinese Journal of Rock Mechanics and Engineering,2008,27(3):624–632.(in Chinese))
[7]杨林德,季倩倩,郑永来.软土地铁车站结构的振动台模型试验[J].现代隧道技术,2003(,1):7–11.(YANG Linde,JI Qianqian,ZHENG Yonglai.Shaking table test on metro station structures in soft soil[J].Modern Tunnelling Technology,2003,(1):7–11.(in Chinese))
[8]陈国兴,庄海洋,程绍革,等.土–地铁隧道动力相互作用的大型振动台试验:试验方案设计[J].地震工程与工程振动,2006,26(6):178–183.(CHEN Guoxing,ZHUANG Haiyang,CHENG Shaoge,et al.A large-scale shaking table test for dynamic soil-metro tunnel interaction:test scheme[J].Earthquake Engineering and Engineering Vibration,2006,26(6):178–183.(in Chinese))
[9]陈国兴,庄海洋,杜修力,等.土–地铁隧道动力相互作用的大型振动台试验——试验结果分析[J].地震工程与工程振动,2007,27(1):164–170.(CHEN Guoxing,ZHUANG Haiyang,DU Xiuli,et al.A large-scale shaking table test for dynamic soil-metro tunnel interaction—analysis of test results[J].Earthquake Engineering and Engineering Vibration,2007,27(1):164–170.(in Chinese))
[10]张敏政.地震模拟试验中相似律应用的若干问题[J].地震工程与工程振动,1997,17(2):52–58.(ZHANG Minzheng.Study on similitude laws for shaking table tests[J].Earthquake Engineering and Engineering Vibration,1997,17(2):52–58.(in Chinese))
[11]蒋良潍,姚令侃,王建.基于振动性态和破坏相似的边坡振动台模型试验相似律[J].交通科学与工程,2009,25(2):2–7.(JIANG Liangwei,YAO Lingkan,WANG Jian.Similitude for shaking table model test on side slope relating to dynamic characteristics and strength[J].Journal of Transport Science and Engineering,2009,25(2):2–7.(in Chinese))
[12]杨俊杰.相似理论与结构模型试验[M].武汉:武汉理工大学出版社,2005:38–46.(YANG Junjie.Similarity theory and structure model test[M].Wuhan:Wuhan University of Technology Press,2005:38–46.(in Chinese))
[13]中华人民共和国行业标准编写组.JTG D70—2004公路隧道设计规范[S].北京:人民交通出版社,2004:9.(The Professional Standards Compilation Group of People′s Republic of China.JTG D70—2004 Code for design of road tunnel[S].Beijing:China Communications Press,2004:9.(in Chinese))
[14]杨林德,季倩倩,郑永来,等.地铁车站结构振动台试验中模型箱设计的研究[J].岩土工程学报,2004,26(1):75–78.(YANG Linde,JI Qianqian,ZHENG Yonglai,et al.Study of design of test box in shaking table test for subway station structure in soft soil[J].Chinese Journal of Geotechnical Engineering,2004,26(1):75–78.(in Chinese))
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心