高速行车条件下桩板结构-地基土系统的空间振动性能分析
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摘要
结合某高速铁路桩板结构路基,建立桩板结构-地基土系统空间有限元模型,分析桩板结构路基动力特性。结果表明:其横、竖向基频理论计算与现场实测值比较接近。采用随机振动理论计算机模拟高速列车通过桩板结构路基全过程,系统仿真列车运营性能指标及桩板结构振动响应,与现场实测结果较好吻合。依据国内有关规范,综合评判高速列车运营和桩板结构路基空间振动性能。结果表明:高速列车通过桩板结构路基时,列车具有足够的抗脱轨安全度和优良乘客舒适性,桩板结构路基自身动力响应也较小,能满足高速列车安全、平稳运行要求。
The finite space vibration model of the pile-plank structure—foundation soil system was set up in combination with the construction of the pile-plank structure subgrade laid for a particular high-speed railway.The dynamic characteristics of the pile-plank structure subgrade were calculated.The theoretical horizontal and vertical fundamental frequencies were found to be close to values measured on site.The inherent vibration characteristics of the pile-plate structure roadbed were revealed.The whole process of high-speed train running on the pile-plank structure subgrade was simulated by computer.The train operation performance and pile-plank structure vibration responses were analysed systematically by means of the theories of random vibration.The results of simulation calculation were basically consistent with those of dynamic field test.The high-speed train operation and pile-plank structure subgrade space vibration performance were evaluated comprehensively according to the relevant domestic standards and specifications.The results indicated that when a high-speed train runs on railway lines with the pile-plank structure subgrade,the train demonstrates sufficient anti-derailment reliability and good riding comfort and the dynamic self-responses of the pile-plank structure subgrade are small.
The finite space vibration model of the pile-plank structure—foundation soil system was set up in combination with the construction of the pile-plank structure subgrade laid for a particular high-speed railway.The dynamic characteristics of the pile-plank structure subgrade were calculated.The theoretical horizontal and vertical fundamental frequencies were found to be close to values measured on site.The inherent vibration characteristics of the pile-plate structure roadbed were revealed.The whole process of high-speed train running on the pile-plank structure subgrade was simulated by computer.The train operation performance and pile-plank structure vibration responses were analysed systematically by means of the theories of random vibration.The results of simulation calculation were basically consistent with those of dynamic field test.The high-speed train operation and pile-plank structure subgrade space vibration performance were evaluated comprehensively according to the relevant domestic standards and specifications.The results indicated that when a high-speed train runs on railway lines with the pile-plank structure subgrade,the train demonstrates sufficient anti-derailment reliability and good riding comfort and the dynamic self-responses of the pile-plank structure subgrade are small.
引文
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[7]冯志仁.最大剪切模量对土动力参数及地震反应的影响[J].自然灾害学报,2007,16(6):90-95.FENG Zhi-ren.Influence of Maximum Shear Modulus onDynamic Parameters and Seismic Responses of the Soil[J].Journal of Natural Disasters,2007,16(6):90-95.
[8]李保俊,马坤全,张欣欣.高速铁路无砟轨道桩板结构路基动力特性研究[J].石家庄铁道大学学报:自然科学版,2011,24(1):63-68.LI Bao-jun,MA Kun-quan,ZHANG Xin-xin.Study on Dy-namic Property of Pile-plank Embankment Used in High-speed Railway with Slab-track[J].Journal of ShijiazhuangTiedao University:Natural Science,2011,24(1):63-68.
[9]罗林,张格明,吴旺青,等.轮轨系统轨道平顺状态的控制[M].北京:中国铁道出版社,2006:58-70.
[10]中华人民共和国铁道部.铁建设[2008]7号客运专线铁路工程竣工验收动态检测指导意见[S].北京:中国铁道出版这,2009.
[11]中华人民共和国铁道部.科技基[2008]65号关于印发“客运专线300～350km/h轨道不平顺管理值审查意见”的通知[Z].北京:中华人民共和国铁道部,2008:3-4.
[12]中华人民共和国铁道部.铁运[2007]252号关于印发《CRH2型时速300～350公里动车组总体技术方案》的通知[Z].北京:中华人民共和国铁道部,2007:26.
[13]中华人民共和国铁道部.铁运(2008)28号关于印发《高速动车组整车试验规范》的通知[Z].北京:中华人民共和国铁道部,2008:24.
[14]中华人民共和国铁道部.TB10621—2009J971—2009高速铁路设计规范(试行)[S].北京:中国铁道出版社,2010:51-59.
[2]唐第甲.郑西客运专线桩板结构路基激振试验研究[D].成都:西南交通大学,2006:1-20.
[3]詹永祥,蒋关鲁,牛国辉,等.武广线高边坡陡坡地段桩板结构路基的设计理论探讨[J].铁道工程学报,2007,(S1):94-96.ZHAN Yong-xiang,JIANG Guan-lu,NIU Guo-hui,et al.Theoretical Exploration on Design of Pile-plate StructureSubgrade in Steep Slope Section of High Side Slope onWuchang-Guangzhou Railway Passenger Dedicated Line[J].Journal of railway engineering society,2007,(S1):94-96.
[4]梁波,邓剑辰.桩板结构路基的动力响应分析[J].铁道学报,2008,30(5):80-84.LIANG Bo,DENG Jian-chen.Analysis on Dynamic Re-sponses of Subgrade with the Pile-plank Structure[J].Journal of the China Railway Society,2008,30(5):80-84.
[5]ESVELD C,MARKINE V.Assessment of High-speedSlab Track Design[J].European Railway Review,2006,(6):1-11.
[6]中华人民共和国铁道部.TB10002.3—2005铁路桥涵钢筋混凝土和预应力混凝土结构设计规范[S].北京:中国铁道出版社,2005:19.
[7]冯志仁.最大剪切模量对土动力参数及地震反应的影响[J].自然灾害学报,2007,16(6):90-95.FENG Zhi-ren.Influence of Maximum Shear Modulus onDynamic Parameters and Seismic Responses of the Soil[J].Journal of Natural Disasters,2007,16(6):90-95.
[8]李保俊,马坤全,张欣欣.高速铁路无砟轨道桩板结构路基动力特性研究[J].石家庄铁道大学学报:自然科学版,2011,24(1):63-68.LI Bao-jun,MA Kun-quan,ZHANG Xin-xin.Study on Dy-namic Property of Pile-plank Embankment Used in High-speed Railway with Slab-track[J].Journal of ShijiazhuangTiedao University:Natural Science,2011,24(1):63-68.
[9]罗林,张格明,吴旺青,等.轮轨系统轨道平顺状态的控制[M].北京:中国铁道出版社,2006:58-70.
[10]中华人民共和国铁道部.铁建设[2008]7号客运专线铁路工程竣工验收动态检测指导意见[S].北京:中国铁道出版这,2009.
[11]中华人民共和国铁道部.科技基[2008]65号关于印发“客运专线300～350km/h轨道不平顺管理值审查意见”的通知[Z].北京:中华人民共和国铁道部,2008:3-4.
[12]中华人民共和国铁道部.铁运[2007]252号关于印发《CRH2型时速300～350公里动车组总体技术方案》的通知[Z].北京:中华人民共和国铁道部,2007:26.
[13]中华人民共和国铁道部.铁运(2008)28号关于印发《高速动车组整车试验规范》的通知[Z].北京:中华人民共和国铁道部,2008:24.
[14]中华人民共和国铁道部.TB10621—2009J971—2009高速铁路设计规范(试行)[S].北京:中国铁道出版社,2010:51-59.
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