重载作用下铁路隧道底部结构动力响应特征及合理设计参数研究
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摘要
文章基于动力有限元理论,采用激振函数模拟列车荷载,建立了重载铁路隧道结构与围岩的耦合数值计算模型,分别分析了不同矢跨比、填充层厚度和仰拱厚度对重载铁路隧道底部结构动力响应特性的影响。结果表明:重载作用下,隧道底部结构各部位的动力响应程度较常规铁路隧道更大,对结构的稳定性更为不利。同时通过研究得出了重载作用下,隧底结构不同力学指标的最大响应值及其出现的具体位置,进一步通过设置典型参数工况,探讨了重载双线铁路隧道底部结构的合理设计参数,对于重载双线铁路隧道底部结构,矢跨比、填充层厚度、仰拱厚度分别取为1/10~1/11、1.2~1.3 m和40~50 cm较为合理,能有效改善重载双线铁路隧道底部结构的动力响应及受力状态。
A numerical model coupling a heavy-haul railway tunnel structure and its surrounding rock is estab-lished using the excitation function and based on the theory of dynamic finite element. The influence of differentrise-span ratios and the thicknesses of the filling layer and invert on the characteristics of the dynamic response in aheavy-haul railway tunnel structure are analyzed. The results show that dynamic response of the whole floor struc-ture of a heavy-haul railway tunnel is larger than that of normal railway tunnel and it is unfavorable for the stabilityof tunnel structure. The maximum response values of different mechanical indexes for a tunnel floor structure underheavy load and corresponding positions are obtained. Reasonable design parameters for the floor structure of a dou-ble-track railway tunnel under a heavy load are discussed; for the floor structure of a heavy-haul double-track rail-way tunnel, a reasonable rise-span ratio and thickness of the filling layer and invert are 1/10~1/11, 1.2~1.3 m and40~50 cm, respectively. These parameters could effectively improve the dynamic response and stress state of thesestructures.
A numerical model coupling a heavy-haul railway tunnel structure and its surrounding rock is estab-lished using the excitation function and based on the theory of dynamic finite element. The influence of differentrise-span ratios and the thicknesses of the filling layer and invert on the characteristics of the dynamic response in aheavy-haul railway tunnel structure are analyzed. The results show that dynamic response of the whole floor struc-ture of a heavy-haul railway tunnel is larger than that of normal railway tunnel and it is unfavorable for the stabilityof tunnel structure. The maximum response values of different mechanical indexes for a tunnel floor structure underheavy load and corresponding positions are obtained. Reasonable design parameters for the floor structure of a dou-ble-track railway tunnel under a heavy load are discussed; for the floor structure of a heavy-haul double-track rail-way tunnel, a reasonable rise-span ratio and thickness of the filling layer and invert are 1/10~1/11, 1.2~1.3 m and40~50 cm, respectively. These parameters could effectively improve the dynamic response and stress state of thesestructures.
引文
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[10]丁祖德,谢洪涛,彭立敏.高速铁路隧道基底软岩动力响应特性分析[J].昆明理工大学学报(自然科学版),2013,38(3):36-41,79.DING Zude,XIE Hongtao,PENG Limin.Dynamic Response Properties of Soft Bedrock of High-Speed Railway Tunnel[J].Journal of Kunming University of Science and Technology(Science and Technology),2013,38(3):36-41,79.
[11]黄娟,彭立敏,陈松杰.高速移动荷载作用下铁路隧道的动力响应分析[J].郑州大学报,2008,29(3):118-121.HUANG Juan,PENG Limin,CHEN Songjie.Dynamic Responses of Railway Runnels Under High-Speed Moving Loads[J].Journal of Zheng Zhou University(Engineering Science).2008,29(3):118-121.
[12]梁波,蔡英.不平顺条件下铁路路基的动力分析[J].铁道学报,1999,21(2):84-88.LIANG Bo,CAI Ying.Dynamic Analysis on Subgrade of High Speed Railways in Geometric Irregular Condition[J].Journal of the China Railway Society,1999,21(2):84-88.
[13]李亮,张丙强,杨小礼.高速列车振动荷载下大断面隧道结构动力响应分析[J].岩石力学与工程学报,2005,24(23):4259-4265.LI Liang,ZHANG Bingqiang,YANG Xiaoli.Analysis of Dynamic Response of Large Cross-Section Tunnel under Vibrating Load Induced By High Speed Train[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(23):4259-4265.
[14]龚晓南.土工计算机分析[M].北京:中国建筑工业出版社,2000.GONG Xiaonan.Computer Analysis on Geotechnique[M].Beijing:China Architecture and Building Press,2000.
[15]刘晶波,谷音,杜义欣.一致粘弹性人工边界及粘弹性边界单元[J].岩土工程学报,2006,28(9):1070-1075.LIU Jingbo,GU Yin,DU Yixin.Consistent Viscous-Spring Artificial Boundaries and Viscous-Spring Boundary Elements[J].Chinese Journal of Geotechnical Engineering,2006,28(9):1070-1075.
[2]钱立新.世界重载铁路运输技术的最新进展[J].机车电传动,2010,56(1):3-7.QIAN Lixin.The World Latest Progress of Heavy Railway Transportation Technology[J].Electric Drive for Locomotives,2010,56(1):3-7.
[3]苗雷强,岳祖润,冯怀平.既有线重载铁路路基翻浆冒泥成因及防治措施[J].安徽建筑,2014,42(1):113-121.MIAO Leiqiang,YUE Zurun,FENG Huaiping.Causes and Prevention Measures of Mud Pumping in Existing Heavy Haul-Railways Subgrade[J].Anhui Architecture,2014,21(1):113-121.
[4]METRIKINE A.V,VROUWENVELDER A.C.W.M.Surface Ground Vibration Due to a Moving Train in a Tunnel:Two-Dimensional Model[J].Journal of Sound and Vibration,2000,234(1):43-66.
[5]HUSSEINA M.F.M,HUNT H.E.M.A Numerical Model for Calculating Vibration from a Railway Tunnel Embedded in a Full-Space[J].Journal of Sound and Vibration,2007,305(1):401-431.
[6]X.SHENG,C.J.C.JONES,D.J.THOMPSON.Ground Vibration Generated by a Harmonic Load in a Circular Tunnel in a Layered Ground[J].Journal of Low Frequency Noise,Vibration and Active Control,2003,22(2):83-96.
[7]YANG Y B,HUNG H.H,Soil Vibrations Caused by Underground Moving Trains[J].Journal of Geotechnical and Geoenvironmental Engineering,2008,134(1):1633-1644.
[8]李德武,高峰,韩文峰.列车振动下隧道基底合理结构型式的研究[J].岩石力学与工程学报,2004,23(13):2292-2297.LI Dewu,GAO Feng,HAN Wenfeng.Study on Rational Structure of Railway Tunnel Bed Under Dynamic Vibration Load[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(13):2292-2297.
[9]王祥秋,杨林德,周治国.列车振动荷载作用下隧道衬砌结构动力响应特性分析[J].岩石力学与工程报,2006,25(7):1337-1342.WANG Xiangqiu,YANG Linde,ZHOU Zhiguo.Dynamic Response Analysis of Lining Structure for Tunnel Under Vibration Loads of Train[J].Chinese Journal of Rock Mechanics and Engineering,2006,25(7):1337-1342.
[10]丁祖德,谢洪涛,彭立敏.高速铁路隧道基底软岩动力响应特性分析[J].昆明理工大学学报(自然科学版),2013,38(3):36-41,79.DING Zude,XIE Hongtao,PENG Limin.Dynamic Response Properties of Soft Bedrock of High-Speed Railway Tunnel[J].Journal of Kunming University of Science and Technology(Science and Technology),2013,38(3):36-41,79.
[11]黄娟,彭立敏,陈松杰.高速移动荷载作用下铁路隧道的动力响应分析[J].郑州大学报,2008,29(3):118-121.HUANG Juan,PENG Limin,CHEN Songjie.Dynamic Responses of Railway Runnels Under High-Speed Moving Loads[J].Journal of Zheng Zhou University(Engineering Science).2008,29(3):118-121.
[12]梁波,蔡英.不平顺条件下铁路路基的动力分析[J].铁道学报,1999,21(2):84-88.LIANG Bo,CAI Ying.Dynamic Analysis on Subgrade of High Speed Railways in Geometric Irregular Condition[J].Journal of the China Railway Society,1999,21(2):84-88.
[13]李亮,张丙强,杨小礼.高速列车振动荷载下大断面隧道结构动力响应分析[J].岩石力学与工程学报,2005,24(23):4259-4265.LI Liang,ZHANG Bingqiang,YANG Xiaoli.Analysis of Dynamic Response of Large Cross-Section Tunnel under Vibrating Load Induced By High Speed Train[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(23):4259-4265.
[14]龚晓南.土工计算机分析[M].北京:中国建筑工业出版社,2000.GONG Xiaonan.Computer Analysis on Geotechnique[M].Beijing:China Architecture and Building Press,2000.
[15]刘晶波,谷音,杜义欣.一致粘弹性人工边界及粘弹性边界单元[J].岩土工程学报,2006,28(9):1070-1075.LIU Jingbo,GU Yin,DU Yixin.Consistent Viscous-Spring Artificial Boundaries and Viscous-Spring Boundary Elements[J].Chinese Journal of Geotechnical Engineering,2006,28(9):1070-1075.