强震区隧道软岩洞口段刚柔并济抗减震措施模型试验研究
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摘要
为进一步提高强震区隧道软岩洞口段的抗震安全性,以白云顶隧道为研究背景,利用大型振动台,对隧道软岩洞口段采用结构加强并施设减震层的刚柔并济抗减震措施进行模型试验研究。试验结果表明:仅采取结构加强措施,隧道洞口段全段结构安全系数最小值增长百分比在30%-60%之间;仅施设减震层,隧道洞口段全段结构安全系数最小值增长百分比在55%-70%之间,减震层在减小地震震动和强制位移向二衬传递方面作用明显,减震效果显著;采取结构加强并施设减震层,隧道洞口段全段结构安全系数最小值增长百分比在105%-160%之间,刚柔并济抗减震措施抗震效果最佳。
In order to improve the anti-seismic performance of soft rock tunnel portal part in meizoseismal area,this paper,by taking the Baiyunding tunnel as the research background,conducts a large-scale shaking table model test research for the rigidflexible combination of aseismic and damping measures by strengthening the structure and meanwhile applying shock absorbing layers.The results show that the enhance percentage of the structure minimum safety factor of the whole tunnel portal part is 30%-60% by only taking structure strengthening measures;The enhance percentage of the structure minimum safety factor of the whole tunnel portal part is 55%-70% by only applying the shock absorbing layer,which indicates its remarkable shock absorption effect by significantly reduce the seismic shock and force the displacement to the secondary lining.The enhance percentage of the structure minimum safety factor of the whole tunnel portal part is 105%-160% by strengthening the structure and meanwhile applying the shock absorbing layer,which shows that the anti-seismic effect of the rigid-flexible combination of aseismic and damping measures is the best.These research results can provide reference for the earthquake fortification design of traffic tunnel in meizoseismal regions.
In order to improve the anti-seismic performance of soft rock tunnel portal part in meizoseismal area,this paper,by taking the Baiyunding tunnel as the research background,conducts a large-scale shaking table model test research for the rigidflexible combination of aseismic and damping measures by strengthening the structure and meanwhile applying shock absorbing layers.The results show that the enhance percentage of the structure minimum safety factor of the whole tunnel portal part is 30%-60% by only taking structure strengthening measures;The enhance percentage of the structure minimum safety factor of the whole tunnel portal part is 55%-70% by only applying the shock absorbing layer,which indicates its remarkable shock absorption effect by significantly reduce the seismic shock and force the displacement to the secondary lining.The enhance percentage of the structure minimum safety factor of the whole tunnel portal part is 105%-160% by strengthening the structure and meanwhile applying the shock absorbing layer,which shows that the anti-seismic effect of the rigid-flexible combination of aseismic and damping measures is the best.These research results can provide reference for the earthquake fortification design of traffic tunnel in meizoseismal regions.
引文
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[12]赵武胜,陈卫忠,谭贤君,等.高性能泡沫混凝土隧道隔震材料研究[J].岩土工程学报,2013,35(8):1544-1552.ZHAO Wu-sheng,CHEN Wei-zhong,TAN Xian-jun,et al.High-performance foam concrete for seismic-isolation materials of tunnels[J].Chinese Journal of Geotechnical Engineering,2013,35(8):1544-1552.
[13]王峥峥,王正松,高波.高烈度地震区连拱隧道洞口段抗震措施研究[J].中国公路学报,2011,24(6):80-85.WANG Zheng-zheng,WANG Zheng-song,GAO Bo.Research on seismic measures of double-arch tunnel portals in high-intensity earthquake zone[J].China Journal Highway and Transport,2011,24(6):80-85.
[14]李福献.山岭隧道洞口段衬砌刚度对其抗震性能的影响[J].国防交通工程与技术,2014,12(3):15-19.LI Fu-xian.On the influence of the linling stiffness on its seismic performance of a tunnel at the portal section[J].Traffic Engineering and Technology for National Defense,2014,12(3):15-19.
[15]重庆交通科研设计院.公路隧道设计规范(JTG D70-2004)[S].北京:人民交通出版社,2004.Chongqing Communications Research and Design Institute.Code for design of road tunnel[S].Beijing:China Communications Press,2004.
[2]四川省交通厅公路规划勘察设计研究院.“5.12”汶川特大地震四川灾区国省干线公路检测评估技术总结[R].成都:四川省交通厅,2008.Highway Planning,Survey,Design and Research Institute,Sichuan Provincial Communications Department.Conclusion of detecting and evaluating of national and provincial highways in Sichuan Province after“5.12”Wenchuan earthquake[R].Chengdu:Sichuan Provincial Communications Department,2008.
[3]高波,王峥峥,袁松,等.汶川地震公路隧道震害启示[J].西南交通大学学报,2009,44(3):336-374.GAO Bo,WANG Zheng-zheng,YUAN Song,et al.Lessons learnt from damage of highway tunnels in Wenchuan earthquake[J].Journal of Southwest Jiaotong University,2009,44(3):336-374.
[4]崔光耀,伍修刚,王明年,等.汶川8.0级大地震公路隧道震害调查与震害特征[J].现代隧道技术,2017,54(2):9-16.CUI Guang-yao,WU Xiu-gang,WANG Ming-nian,et al.Earthquake damages and characteristics of highway tunnels in the 8.0-magnitude Wenchuan earthquake[J].Modern Tunneling Technology,2017,54(2):9-16.
[5]王明年,于丽,林国进,等.公路隧道抗震及减震[M].北京:科学出版社,2012.WANG Ming-nian,YU Li,LIN Guo-jin,et al.Tunnel Seismic and Shock Absorption[M].Beijing:Science Press,2012.
[6]崔光耀,王明年,于丽,等.汶川地震公路隧道洞口结构震害分析及震害机理研究[J].岩土工程学报,2013,35(6):1084-1091.CUI Guang-yao,WANG Ming-nian,YU Li,et al.A-nalysis of seismic damage and mechanism of portal structure of highway tunnel in Wenchuan earthquake[J].Chinese Journal of Geotechnical Engineering,2013,35(6):1084-1091.
[7]蒋树屏,文栋良,郑升宝.嘎隆拉隧道洞口段地震响应大型振动台模型试验研究[J].岩石力学与工程学报,2011,30(4):649-656.JIANG Shu-ping,WEN Dong-liang,ZHENG Shengbao.Large-scale shaking table test for seismic response in portal section of galongla tunnel[J].Rock and Soil Mechanics,2011,30(4):649-656.
[8]王明年,崔光耀.高烈度地震区隧道设置减震层的减震原理研究[J].土木工程学报,2011,48(8):126-131.WANG Ming-nian,CUI Guang-yao.Study of the mechanism of shock absorption layer in the supporting system of tunnels in highly seismic areas[J].China Civil Engineering Journal,2011,48(8):126-131.
[9]王帅帅,高波.隧道设置减震层减震机制研究[J].岩石力学与工程学报,2016,35(3):592-603.WANG Shuai-shuai,GAO Bo.Damping mechanism and shaking table test on mountain tunnel linings with buffer layers[J].Chinese Journal of Rock Mechanics and Engineering,2016,35(3):592-603.
[10]李育枢,李天斌,王栋.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 Yu-shu,LI Tian-bin,WANG Dong.Large-scale shaking table test for vibration-absorption measures of portal section of Huangcaoping tunnel 2#[J].Chinese Journal of Rock Mechanics and Engineering,2009,28(6):1128-1135.
[11]侯森,陶连金,李书龙,等.山岭隧道洞口段设置减震层的振动台模型试验研究[J].地震工程学报,2014,30(3):187-195.HOU Sen,TAO Lian-jin,LI Shu-long,et.Shaking table test for seismic response in portal section of mountain tunnel[J].World Earthquake Engineering,2014,30(3):187-195.
[12]赵武胜,陈卫忠,谭贤君,等.高性能泡沫混凝土隧道隔震材料研究[J].岩土工程学报,2013,35(8):1544-1552.ZHAO Wu-sheng,CHEN Wei-zhong,TAN Xian-jun,et al.High-performance foam concrete for seismic-isolation materials of tunnels[J].Chinese Journal of Geotechnical Engineering,2013,35(8):1544-1552.
[13]王峥峥,王正松,高波.高烈度地震区连拱隧道洞口段抗震措施研究[J].中国公路学报,2011,24(6):80-85.WANG Zheng-zheng,WANG Zheng-song,GAO Bo.Research on seismic measures of double-arch tunnel portals in high-intensity earthquake zone[J].China Journal Highway and Transport,2011,24(6):80-85.
[14]李福献.山岭隧道洞口段衬砌刚度对其抗震性能的影响[J].国防交通工程与技术,2014,12(3):15-19.LI Fu-xian.On the influence of the linling stiffness on its seismic performance of a tunnel at the portal section[J].Traffic Engineering and Technology for National Defense,2014,12(3):15-19.
[15]重庆交通科研设计院.公路隧道设计规范(JTG D70-2004)[S].北京:人民交通出版社,2004.Chongqing Communications Research and Design Institute.Code for design of road tunnel[S].Beijing:China Communications Press,2004.