地震作用下浅埋隧道系统锚杆参数优化
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摘要
针对增加衬砌厚度往往对提高结构抗震性能效果甚微的问题,提出了通过合理选取系统锚杆参数来增强隧道抗震性能的思路.在静力分析和动力分析两个阶段探讨了不同工况下锚杆及衬砌的受力状态,研究了结构动力响应特征及最大响应值随锚杆参数的变化规律,并对锚杆参数优化问题进行了分析.结果显示:增设墙脚处锚杆可大幅提高隧道抗震性能,同时,锚杆长度及布置方式对结构受力影响较大.
In view of the fact that the effect of improving seismic performance of tunnel by increasing lining thickness was little,the idea for improving seismic performance of tunnel by reasonable selection of the parameters of systematic bolts was proposed.The mechanical states of tunnel lining and systematic bolts under different conditions were discussed through two analysis stages,namely static analysis stage and dynamic analysis stage.The properties of structural dynamic response and the variation law of maximum response with bolt parameters were analyzed.Furthermore,the optimization problem of bolt parameters was deeply studied.The results indicated that the structural seismic performance could be improved greatly by setting bolts at the foot of the curved wall.Meanwhile,the internal forces of lining were influenced by the bolt length and collocation form to some extent.
In view of the fact that the effect of improving seismic performance of tunnel by increasing lining thickness was little,the idea for improving seismic performance of tunnel by reasonable selection of the parameters of systematic bolts was proposed.The mechanical states of tunnel lining and systematic bolts under different conditions were discussed through two analysis stages,namely static analysis stage and dynamic analysis stage.The properties of structural dynamic response and the variation law of maximum response with bolt parameters were analyzed.Furthermore,the optimization problem of bolt parameters was deeply studied.The results indicated that the structural seismic performance could be improved greatly by setting bolts at the foot of the curved wall.Meanwhile,the internal forces of lining were influenced by the bolt length and collocation form to some extent.
引文
[1]张鸿,毕继红,张伟.地铁隧道地震反应非线性分析[J].地震工程与工程振动,2004,24(6):146-153.
[2]Hashash Y M A,Hook J J,Schmidt B,et al.Seis-mic design and analysis of underground structures[J].Tunneling and Underground Space Technology,2001,16(4):247-293.
[3]庄海洋,陈国兴.软弱地基浅埋地铁区间隧洞的地震反应分析[J].岩石力学与工程学报,2005,24(14):2 506-2 512.
[4]刘晶波,李彬,谷音.地铁盾构隧道地震反应分析[J].清华大学学报:自然科学版,2005,45(6):757-760.
[5]刘晶波,李彬.地铁地下结构抗震分析及设计的几个关键问题[J].土木工程学报,2006,39(6):106-110.
[6]Okamoto S.Introduction to Earthquake Engineering[M].2nd Edition.Tokyo:University of TokyoPress,1984.
[7]潘昌实.隧道及地下结构物抗震问题的研究概况[J].世界隧道,1996,5:7-16.
[8]张德华,王梦恕,符华兴,等.强挤压型隧道锚杆支护参数的确定[J].岩石力学与工程学报,2004,23(13):2 201-2 204.
[9]张社荣,顾岩,张宗亮.超大型地下洞室围岩锚杆支护方式的优化设计[J].水力发电学报,2007,26(5):47-52.
[10]Deeks A J,Randolph M F.Axisymmetric time-do-main transmitting boundaries[J].Journal of Engi-neering Mechanics,1994,120(1):25-42.
[11]王祥秋,杨林德,高文华,等.基于小波分析的隧道衬砌结构动力响应规律研究[J].岩石力学与工程学报,2005,24(10):1 746-1 750.
[12]赵德安,蔡小林,Swoboda G.锚杆单元及其在黄土隧道计算中的若干问题[J].岩石力学与工程学报,2004,23(24):4 183-4 189.
[2]Hashash Y M A,Hook J J,Schmidt B,et al.Seis-mic design and analysis of underground structures[J].Tunneling and Underground Space Technology,2001,16(4):247-293.
[3]庄海洋,陈国兴.软弱地基浅埋地铁区间隧洞的地震反应分析[J].岩石力学与工程学报,2005,24(14):2 506-2 512.
[4]刘晶波,李彬,谷音.地铁盾构隧道地震反应分析[J].清华大学学报:自然科学版,2005,45(6):757-760.
[5]刘晶波,李彬.地铁地下结构抗震分析及设计的几个关键问题[J].土木工程学报,2006,39(6):106-110.
[6]Okamoto S.Introduction to Earthquake Engineering[M].2nd Edition.Tokyo:University of TokyoPress,1984.
[7]潘昌实.隧道及地下结构物抗震问题的研究概况[J].世界隧道,1996,5:7-16.
[8]张德华,王梦恕,符华兴,等.强挤压型隧道锚杆支护参数的确定[J].岩石力学与工程学报,2004,23(13):2 201-2 204.
[9]张社荣,顾岩,张宗亮.超大型地下洞室围岩锚杆支护方式的优化设计[J].水力发电学报,2007,26(5):47-52.
[10]Deeks A J,Randolph M F.Axisymmetric time-do-main transmitting boundaries[J].Journal of Engi-neering Mechanics,1994,120(1):25-42.
[11]王祥秋,杨林德,高文华,等.基于小波分析的隧道衬砌结构动力响应规律研究[J].岩石力学与工程学报,2005,24(10):1 746-1 750.
[12]赵德安,蔡小林,Swoboda G.锚杆单元及其在黄土隧道计算中的若干问题[J].岩石力学与工程学报,2004,23(24):4 183-4 189.
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