高架桥段与路堤段CRH动车组运行引起的地面振动对比测试
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摘要
现场测试沪宁城际中国高速铁路(CRH)动车组运行引起的高架桥段和路堤段的地面振动竖向速度,分析2种线路的地面振动特征及其传播的衰减规律。结果表明:CRH动车组运行引起的地面振动主频在80 Hz以下,属于低频振动;车厢数量对列车运行引起的地面振动强度影响小;对153～201 km/h列车的运行速度,车速的大小对地面振动幅值的影响不明显;随着测点离轨道距离的增加,高架桥段的地面振动主频降低、峰值地面速度衰减曲线较为平稳光滑,路堤段的地面振动主频几乎不变、峰值地面速度衰减曲线存在多个振动反弹区;高架桥段的地面振动强度高于路堤段的地面振动强度;路堤旁修建的排水沟对地面振动具有隔振作用。
The vertical velocity on ground surface vibration was measured by China Railway High-speed(CRH) trains running on viaduct and embankment of Hu-Ning Intercity Railway.The characteristics and propagation attenuation rules of the ground surface vibration of two routes were analyzed.Result showed that the main frequency on ground surface vibration caused by CRH trains running was less than 80 Hz,which belonged to low frequency vibration.The number of carriages had little effect on ground surface vibration intensity.The effect of train speed from 153 km/h to 201 km/h on ground surface vibration intensity had no obvious difference.With the increase of the distance between the ground surface and the track,the main frequency of ground surface vibration on viaduct decreased,and the attenuation curve of peak value of ground surface vibration velocity become smoother.However,the main frequency of ground surface vibration on embankment was nearly unchange and the attenuation curve of peak value of ground surface vibration velocity had several rebound regions of the vibration.Ground surface vibration intensity of viaduct was higher than that of embankment.The drainage ditch built beside the embankment had vibration isolation effects on ground surface vibration.
The vertical velocity on ground surface vibration was measured by China Railway High-speed(CRH) trains running on viaduct and embankment of Hu-Ning Intercity Railway.The characteristics and propagation attenuation rules of the ground surface vibration of two routes were analyzed.Result showed that the main frequency on ground surface vibration caused by CRH trains running was less than 80 Hz,which belonged to low frequency vibration.The number of carriages had little effect on ground surface vibration intensity.The effect of train speed from 153 km/h to 201 km/h on ground surface vibration intensity had no obvious difference.With the increase of the distance between the ground surface and the track,the main frequency of ground surface vibration on viaduct decreased,and the attenuation curve of peak value of ground surface vibration velocity become smoother.However,the main frequency of ground surface vibration on embankment was nearly unchange and the attenuation curve of peak value of ground surface vibration velocity had several rebound regions of the vibration.Ground surface vibration intensity of viaduct was higher than that of embankment.The drainage ditch built beside the embankment had vibration isolation effects on ground surface vibration.
引文
[1]Yoshioka O.Basic characteristics of shinkansen-induced groundvibration and its reduction measures[J].Proc Wave,2000,20:219-239.
[2]Takemiya H.Substructure simulation of inhomogeneous track andlayered ground dynamic interaction under train passage[J].Jour-nal of Engineering Mechanics,2005,131(7):699-711.
[3]高广运,李志毅,冯世进,等.秦-沈铁路列车运行引起的地面振动实测与分析[J].岩土力学,2007,28(9):1817-1822.
[4]陈建国,夏禾,肖军华,等.列车运行对周围地面振动影响的试验研究[J].岩土力学,2008,29(11):3113-3118.
[5]韦红亮,雷晓燕,吕绍棣.列车引发地面振动的现场测试及数值分析[J].环境污染与防治,2008,30(9):23-25.
[6]葛勇,张希黔,肖正直,等.无碴轨列车运行引起的环境振动影响评价[J].环境工程学报,2010,4(1):235-240.
[7]夏禾.车辆与结构动力相互作用[M].北京:科学出版社,2002.
[8]卢祖文.客运专线铁路轨道[M].北京:中国铁道出版社,2005.
[9]高广运,彭争光,李伟,等.三维层状地基空沟主动隔振分析[J].西北地震学报,2006,28(3):210-215.
[2]Takemiya H.Substructure simulation of inhomogeneous track andlayered ground dynamic interaction under train passage[J].Jour-nal of Engineering Mechanics,2005,131(7):699-711.
[3]高广运,李志毅,冯世进,等.秦-沈铁路列车运行引起的地面振动实测与分析[J].岩土力学,2007,28(9):1817-1822.
[4]陈建国,夏禾,肖军华,等.列车运行对周围地面振动影响的试验研究[J].岩土力学,2008,29(11):3113-3118.
[5]韦红亮,雷晓燕,吕绍棣.列车引发地面振动的现场测试及数值分析[J].环境污染与防治,2008,30(9):23-25.
[6]葛勇,张希黔,肖正直,等.无碴轨列车运行引起的环境振动影响评价[J].环境工程学报,2010,4(1):235-240.
[7]夏禾.车辆与结构动力相互作用[M].北京:科学出版社,2002.
[8]卢祖文.客运专线铁路轨道[M].北京:中国铁道出版社,2005.
[9]高广运,彭争光,李伟,等.三维层状地基空沟主动隔振分析[J].西北地震学报,2006,28(3):210-215.
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