强震区山岭隧道围岩全环间隔注浆预加固的方案研究
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摘要
依托雅安至泸沽高速公路高烈度地震区山岭隧道工程,对隧道围岩全环间隔注浆预加固方案进行动力响应分析,提出隧道结构抗震性能的评价方法,即采用相邻质点之间相同时刻的最大相对位移指标;解释隧道上部结构各质点不同步变形引起的隧道拱顶出现坍塌和隧道边墙脚破坏主要是由于应力集中引起的原因;提出了隧道不同地段宜采取不同的全环间隔注浆预加固方案。该研究成果对高烈度地震区山岭隧道抗减震设计与施工具有一定的参考价值。
Based on the mountain tunnel in the high-intensity earthquake zone of Yaan-Lugu Expressway,the dynamic response of the rocks surrounding the tunnel,which were treated by the interval grouting pre-reinforcement schemes,was analyzed.A method,based on the maximum relative displacement of the adjacent particles occurs at the same time,is proposed to evaluate the tunnel seismic performance.The fact that the collapses of the tunnel vault result from synchronous deformation of the particles in the tunnel upper structure and the fact that the stress concentration probably result in the side-wall foot damage of the tunnel are illustrated.That the different location should be treated with different interval pre-reinforcement schemes is recommended.The findings and conclusions in this paper are of certain reference value for the seismic design and construction of mountain tunnels in the high-intensity earthquake area.
Based on the mountain tunnel in the high-intensity earthquake zone of Yaan-Lugu Expressway,the dynamic response of the rocks surrounding the tunnel,which were treated by the interval grouting pre-reinforcement schemes,was analyzed.A method,based on the maximum relative displacement of the adjacent particles occurs at the same time,is proposed to evaluate the tunnel seismic performance.The fact that the collapses of the tunnel vault result from synchronous deformation of the particles in the tunnel upper structure and the fact that the stress concentration probably result in the side-wall foot damage of the tunnel are illustrated.That the different location should be treated with different interval pre-reinforcement schemes is recommended.The findings and conclusions in this paper are of certain reference value for the seismic design and construction of mountain tunnels in the high-intensity earthquake area.
引文
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[2]Shen Yusheng,Gao Bo,Wang Yingxue.Analyses on tunnelfailure mode and mechanism during Wenchuan earthquake[C]//International Conference on EarthquakeEngineering--The 1st Anniversary of WenchuanEarthquake,2009,5:568-573
[3]Shen Yusheng,Gao Bo.Dynamic behavior of portal part oftraffic tunnel in high-intensity earthquake area[C]//TheSecond International Conference of TransportationEngineering,2009,07:3417-3422
[4]申玉生,高波,王英学.强震区山岭隧道洞口段的结构动力特性研究[J].岩石力学与工程学报,2009,28(增1):3131-3136(Shen Yusheng,Gao Bo,Wang Yingxue.Dynamic properties analysis for portal part of mountaintunnel in strong earthquake area[J].Chinese Journal ofRock Mechanics and Engineering,2009,28(s1)1:3131-3136(in Chinese))
[5]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(增1):62-66(Shen Yusheng,Gao Bo,Wang Zhengzheng.Study onfailure mode analysis mountain tunnel shake table test inHigh-intensity earthquake area[J].EngineeringMechanics,2009,26(s1)1:62-66(in Chinese))
[6]申玉生,高波,王峥峥,等.高烈度地震区山岭隧道模型试验研究[J].现代隧道技术,2008,(5):38-43(ShenYusheng,Gao Bo,Wang Zhengzheng,et al.Model test fora road tunnel in the region of high seismic intensity[J].Modern Tunneling Technology,2008,(5):38-43(inChinese))
[7]申玉生.强震区山岭隧道结构与岩土体抗减震耦合特性研究[R].西南交通大学博士后出站报告,2009
[8]Lysmer J,Kuhlemeyer R L.Finite dynamic model forinfinite media[J].Journal of the Engineering Mechanics,ASCE,1972,98(1):85-105
[9]王明年,崔光耀.高烈度地震区隧道减震模型的建立及其减震效果模型试验研究[J].岩土力学,2010,31(6):1884-1889(Wang Mingnian,Cui Guangyao.Establishment of tunnel damping model and research ondamping effect with model test in highly seismic area[J].Rock and Soil Mechanics,2010,31(6):1884-1889(inChinese))
[10]王秀英,刘维宁,张弥.地下结构震害类型及机理研究[J].中国安全科学学报,2003,13(3):55-58(WangXiuying,Liu Weining,Zhang Mi.Study on thecategorization and mechanism of seismic damage ofunderground structures[J].China Safety Science Journal,2003,13(3):55-58(in Chinese))
[11]Chen G X,Zhuang HY,Du X L.Large-size shaking tabletest on soil-underground structure interaction[J].Earthquake Engineering and Engineering Vibration,2007,27(2):171-176
[12]李育枢.山岭隧道地震动力响应及减震措施研究[D].上海:同济大学,2006(Li Yushu.Study on earthquakeresponses and vibration-absorption measures for mountaintunnel[D].Shanghai:Tongji University,2006(inChinese))
[13]吴波.复杂条件下城市地铁隧道施工地表沉降研究[D].成都:西南交通大学,2003(Wu Bo.Study of landsubsidence induced by urban subway tunnelling oncomplicated conditions[D].Chengdu:Southwest JiaotongUniversity,2003(in Chinese))
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