双洞隧道洞口段抗减震振动台试验
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摘要
以西南高烈度地震区某拟建隧道为背景,开展了隧道洞口段抗减震振动台模型试验研究。通过对有无减震层体系的对比试验,研究了减震层的减震效果;并针对目前振动台试验普遍采用的多次加载方案产生的损伤累积问题进行了分析,同时给出了围岩和衬砌的裂纹发展过程及破坏形态。结果表明:在围岩与隧道之间设置减震层可以有效减弱围岩与结构之间的动力相互作用,从而起到减震效果;在评价结构抗震性能时需要考虑多次加载产生的损伤累积和裂纹效应的影响。研究结果可为结构在地震作用下的开裂分析提供参考。
Based on the background of tunnels constructed on high-intensity earthquake zone in southwest China,the large-scale shaking table tests were accomplished for studying the seismic capability of the entrance of double track tunnels.The seismic mitigation effect was discussed through the comparison tests of models with and without seismic absorption layer.The effect of damage accumulation caused by multi-loading scheme was analyzed.The propagation process and damage patterns of cracks on surrounding rock and tunnel lining were described.Results show that a seismic absorption layer covered between surrounding rock and tunnel can reduce the dynamic interaction between the surrounding rock and lining structure effectively,meanwhile,the effect of damage accumulation and cracks due to multi-loading scheme should be considered under the evaluation on the seismic capability of tunnels.The results provide a reference for cracking analysis of tunnels under seismic action.
Based on the background of tunnels constructed on high-intensity earthquake zone in southwest China,the large-scale shaking table tests were accomplished for studying the seismic capability of the entrance of double track tunnels.The seismic mitigation effect was discussed through the comparison tests of models with and without seismic absorption layer.The effect of damage accumulation caused by multi-loading scheme was analyzed.The propagation process and damage patterns of cracks on surrounding rock and tunnel lining were described.Results show that a seismic absorption layer covered between surrounding rock and tunnel can reduce the dynamic interaction between the surrounding rock and lining structure effectively,meanwhile,the effect of damage accumulation and cracks due to multi-loading scheme should be considered under the evaluation on the seismic capability of tunnels.The results provide a reference for cracking analysis of tunnels under seismic action.
引文
[1]杨林德,季倩倩,郑永来,等.软土地铁车站结构的振动台模型试验[J].现代隧道技术,2003,40(1):7-11.YANG Lin-de,JI Qian-qian,ZHENG Yong-lai,et al.Shaking Table Test on Metro Structure[J].ModernTunnelling Technology,2003,40(1):7-11.
[2]陈国兴,庄海洋,杜修力,等.土-地铁车站结构动力相互作用大型振动台模型试验研究[J].地震工程与工程振动,2007,27(2):171-176.CHEN Guo-xing,ZHUANG Hai-yang,DU Xiu-li,et al.Large-size Shaking Table Test on Soil-under-ground Structure Interaction[J].Earthquake Engin-eering and Engineering Vibration,2007,27(2):171-176.
[3]车爱兰,岩楯敞广,葛修润.关于地铁地震响应的模型振动试验及数值分析[J].岩土力学,2006,27(8):1293-1298.CHE Ai-lan,IWATATE T,GE Xiu-run.Dynamic Be-haviors of Subway Structure Subjected to StrongEarthquake Motions Using Shaking Table Tests andDynamic Analyses[J].Rock and Soil Mechanics,2006,27(8):1293-1298.
[4]WANG Zheng-zheng,GAO Bo,JIANG Yuan-jun,et al.Investigation and Assessment on Mountain Tunnelsand Geotechnical Damage After the Wenchuan Earth-quake[J].Science in China Series E:TechnologicalSciences,2009,52(2):546-558.
[5]李云鹏,王芝银,韩常领,等.考虑地震影响的小间距隧道围岩流变损伤[J].长安大学学报:自然科学版,2006,26(2):51-56.LI Yun-peng,WANG Zhi-yin,HAN Chang-ling,et al.Rheologic Damage and Earthquake Influence on Sur-rounding Rock of Small Spacing Tunnels[J].Journal ofChang an University:Natural Science Edition,2006,26(2):51-56.
[6]SHARMA S,JUDD W R.Underground Opening Dam-age from Earthquakes[J].Engineering Geology,1991,30(2):263-276.
[7]WANG W L,WANG T T,SU J J,et al.Assessment ofDamage in Mountain Tunnels Due to Taiwan Chi-ChiEarthquake[J].Tunnelling and Underground SpaceTechnology,2001,16(1):133-150.
[8]潘昌实.隧道地震灾害综述[J].隧道及地下工程,1990,11(1):1-9.PAN Chang-shi.Earthquake Damage of Tunnel[J].Tunnel and Underground Engineering,1990,11(1):1-9.
[9]周荣军,何玉林.北京至昆明高速公路四川境雅安至泸沽项目地震安全性评价报告[R].成都:四川赛思特科技有限责任公司,2005.ZHOU Rong-jun,HE Yu-lin.Seismic Safety AppraisalReport of Ya an-Lugu Freeway for Beijing-KunmingExpressway Project[R].Chengdu:Sichuan Sast Tech-nology Co.Ltd,2005.
[2]陈国兴,庄海洋,杜修力,等.土-地铁车站结构动力相互作用大型振动台模型试验研究[J].地震工程与工程振动,2007,27(2):171-176.CHEN Guo-xing,ZHUANG Hai-yang,DU Xiu-li,et al.Large-size Shaking Table Test on Soil-under-ground Structure Interaction[J].Earthquake Engin-eering and Engineering Vibration,2007,27(2):171-176.
[3]车爱兰,岩楯敞广,葛修润.关于地铁地震响应的模型振动试验及数值分析[J].岩土力学,2006,27(8):1293-1298.CHE Ai-lan,IWATATE T,GE Xiu-run.Dynamic Be-haviors of Subway Structure Subjected to StrongEarthquake Motions Using Shaking Table Tests andDynamic Analyses[J].Rock and Soil Mechanics,2006,27(8):1293-1298.
[4]WANG Zheng-zheng,GAO Bo,JIANG Yuan-jun,et al.Investigation and Assessment on Mountain Tunnelsand Geotechnical Damage After the Wenchuan Earth-quake[J].Science in China Series E:TechnologicalSciences,2009,52(2):546-558.
[5]李云鹏,王芝银,韩常领,等.考虑地震影响的小间距隧道围岩流变损伤[J].长安大学学报:自然科学版,2006,26(2):51-56.LI Yun-peng,WANG Zhi-yin,HAN Chang-ling,et al.Rheologic Damage and Earthquake Influence on Sur-rounding Rock of Small Spacing Tunnels[J].Journal ofChang an University:Natural Science Edition,2006,26(2):51-56.
[6]SHARMA S,JUDD W R.Underground Opening Dam-age from Earthquakes[J].Engineering Geology,1991,30(2):263-276.
[7]WANG W L,WANG T T,SU J J,et al.Assessment ofDamage in Mountain Tunnels Due to Taiwan Chi-ChiEarthquake[J].Tunnelling and Underground SpaceTechnology,2001,16(1):133-150.
[8]潘昌实.隧道地震灾害综述[J].隧道及地下工程,1990,11(1):1-9.PAN Chang-shi.Earthquake Damage of Tunnel[J].Tunnel and Underground Engineering,1990,11(1):1-9.
[9]周荣军,何玉林.北京至昆明高速公路四川境雅安至泸沽项目地震安全性评价报告[R].成都:四川赛思特科技有限责任公司,2005.ZHOU Rong-jun,HE Yu-lin.Seismic Safety AppraisalReport of Ya an-Lugu Freeway for Beijing-KunmingExpressway Project[R].Chengdu:Sichuan Sast Tech-nology Co.Ltd,2005.
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