地铁诱发地面振动传播衰减特性分析
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摘要
对上海地铁线路某区间段的地面振动进行测试,得到上下行多组地铁列车运行时地表不同测点处的振动加速度。统计所测加速度时程记录的峰值和有效值,并对信号进行谱分析。采用不同频率计权曲线对实测地表加速度进行振级计算,并分析新旧曲线对振级计算结果带来的影响。建立二维有限元平面应变模型,模拟地铁运行引起的土层场地地面振动,并与实测地面振动进行对比。实测数据的统计结果表明,地铁诱发地面振动的主要频率范围为40～90Hz之间,地铁列车引起的地面振动在衰减过程中存在放大区,为距地铁中心线15m处前后。振级计算结果表明,与W计权曲线相比,WK计权曲线加重了10～80Hz范围内高频振动对人体的影响,WK计权振级比W计权振级大3.2dB。数值模拟的振动衰减规律和实测一致。
An in-situ measurement was conducted at Shanghai metro interval to study the ground vibrations induced by normal operation of subway.The peak value and root-mean-square value of vertical vibrations were computed and the signal spectrum analysis was done.The vibration level was calculated by two different frequency weighting curves.A 2-D finite element analysis was made to simulate the measurement phenomenon.The measurement results show that there was an amplified zone,the position of which is 15 meters away from the tunnel center.Compared with the W frequency weighting curve,the Wk frequency weighting curve weighs heavier on the influence of the human body in the frequency range from 10 Hz to 80 Hz.The vibration level value is 3.2 dB more than the case using W frequency weighting curve.The simulated phenomena are in agreement with the measurement results.
An in-situ measurement was conducted at Shanghai metro interval to study the ground vibrations induced by normal operation of subway.The peak value and root-mean-square value of vertical vibrations were computed and the signal spectrum analysis was done.The vibration level was calculated by two different frequency weighting curves.A 2-D finite element analysis was made to simulate the measurement phenomenon.The measurement results show that there was an amplified zone,the position of which is 15 meters away from the tunnel center.Compared with the W frequency weighting curve,the Wk frequency weighting curve weighs heavier on the influence of the human body in the frequency range from 10 Hz to 80 Hz.The vibration level value is 3.2 dB more than the case using W frequency weighting curve.The simulated phenomena are in agreement with the measurement results.
引文
[1]夏禾,曹艳梅.轨道交通引起的环境振动问题[J].铁道科学与工程学报,2004,1(1):44-51.Xia H,Cao Y M.Problem of railway traffic inducedvibrations of environments[J].Journal of RailwayScience and Engineering,2004,1(1):44-51.
[2]Yang Y B,Hsu L C.A review of researches onground-borne vibrations due to moving trains via un-derground tunnels[J].Advances in Structural Engi-neering,2006,9(3):377-392.
[3]楼梦麟,贾旭鹏,俞洁勤.地铁运行引起的地面振动实测及传播规律分析[J].防灾减灾工程学报,2009,29(3):282-288.Lou M L,Jia X P,Yu J Q.Field measurement and a-nalysis of ground vibration induced by subway trains[J].Journal of Disaster Prevention and Mitigation En-gineering,2009,29(3):282-288.
[4]闫维明,聂晗,任珉,等地铁交通引起地面振动的实测与分析[J].铁道科学与工程学报,2006,3(2):1-5.Yan W M,Nie H,Ren M,et al.In situ experiment andanalysis of ground surface vibration induced by urbansubway trains[J].Journal of Railway Science and En-gineering,2006,3(2):1-5.
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[6]Gupta S,Liu W F,Degrande G.Prediction of vibra-tions induced by underground railway traffic in Beijing[J].Journal of Sound and Vibration,2008,310(3):608-630.
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[9]卢伟健,姚琨,王世强,等.两个版本的ISO2631-1频率计权曲线对比[C]∥中国环境科学学会学术年会论文集.北京:北京市劳动保护科学研究所,2009.294-298.Lu W J,Yao K,Wang Sh Q,et al.Study on the twoversions of the ISO 2631-1frequency weighting curves[C]∥Proceedings of the Chinese Society for Environ-mental Sciences.Beijing:Beijing Labor Protection Sci-ence Research Institute,2009.294-298.
[10]GB10070-88,城市区域环境振动标准[S].
[11]GB50355-2005,住宅建筑室内振动限制及其测量方法标准[S].
[12]HJ453-2008,环境影响评价技术导则-城市轨道交通[S].
[13]GB/T13441.1-2007,机械振动与冲击-人体暴露于全身振动的评价[S].
[14]JGJ/T170-2009,城市轨道交通引起建筑物振动与二次辐射噪声限值及其测量方法标准[S].
[15]沈霞.地铁振动计算分析中的若干问题研究[D].上海:同济大学,2005.Shen X.Study on the problems in the analysis of sub-way-induced vibration[D].Shanghai:Tongji Universi-ty,2005.
[16]袁晓铭,孙锐,孙静,等.常规土类动剪切模量比和阻尼比试验研究[J].地震工程与工程振动,2000,20(4):133-139.Yuan X M,Sun R,Sun J,et al.Laboratory experi-mental study on dynamic shear modulus ratio anddamping ratio of soils[J].Earthquake Engineeringand Engineer Vibration,2000,20(4):133-139.
[17]王田友,丁洁民,楼梦麟.地铁运行引起场地振动的荷载与分析方法[J].工程力学,2010,27(1):195-201.Wang T Y,Ding J M,Lou M L.Load for subway-in-duced free field vibration and analysis method[J].En-gineering Mechanics,2010,27(1):195-201.
[18]黄雨,叶为民,唐益群,等.上海软土场地的地震反应特征分析[J].地下空间与工程学报,2005,1(5):773-778.Huang Y,Ye W M,Tang Y Q,et al.Characteristicanalysis for seismic ground response of soft soils inShanghai[J].Chinese Journal of Underground Spaceand Engineering,2005,1(5):773-778.
[2]Yang Y B,Hsu L C.A review of researches onground-borne vibrations due to moving trains via un-derground tunnels[J].Advances in Structural Engi-neering,2006,9(3):377-392.
[3]楼梦麟,贾旭鹏,俞洁勤.地铁运行引起的地面振动实测及传播规律分析[J].防灾减灾工程学报,2009,29(3):282-288.Lou M L,Jia X P,Yu J Q.Field measurement and a-nalysis of ground vibration induced by subway trains[J].Journal of Disaster Prevention and Mitigation En-gineering,2009,29(3):282-288.
[4]闫维明,聂晗,任珉,等地铁交通引起地面振动的实测与分析[J].铁道科学与工程学报,2006,3(2):1-5.Yan W M,Nie H,Ren M,et al.In situ experiment andanalysis of ground surface vibration induced by urbansubway trains[J].Journal of Railway Science and En-gineering,2006,3(2):1-5.
[5]刘维宁,夏禾,郭文军.地铁列车振动的环境影响[J].岩石力学与工程学报,1996,15(10):586-593.Liu W N,Xia H,Guo W J.Environmental responsedue to trains′vibration in metro[J].Chinese Journal ofRock Mechanics and Engineering,1996,15(10):586-593.
[6]Gupta S,Liu W F,Degrande G.Prediction of vibra-tions induced by underground railway traffic in Beijing[J].Journal of Sound and Vibration,2008,310(3):608-630.
[7]ISO 2631-1:1985,Evaluation of human exposure towhole-body vibration.Part 1:General requirement[S].
[8]ISO 2631-1:1997,Mechanical vibration and shock-E-valuation of human exposure to whole-body vibration.Part 1:General requirement[S].
[9]卢伟健,姚琨,王世强,等.两个版本的ISO2631-1频率计权曲线对比[C]∥中国环境科学学会学术年会论文集.北京:北京市劳动保护科学研究所,2009.294-298.Lu W J,Yao K,Wang Sh Q,et al.Study on the twoversions of the ISO 2631-1frequency weighting curves[C]∥Proceedings of the Chinese Society for Environ-mental Sciences.Beijing:Beijing Labor Protection Sci-ence Research Institute,2009.294-298.
[10]GB10070-88,城市区域环境振动标准[S].
[11]GB50355-2005,住宅建筑室内振动限制及其测量方法标准[S].
[12]HJ453-2008,环境影响评价技术导则-城市轨道交通[S].
[13]GB/T13441.1-2007,机械振动与冲击-人体暴露于全身振动的评价[S].
[14]JGJ/T170-2009,城市轨道交通引起建筑物振动与二次辐射噪声限值及其测量方法标准[S].
[15]沈霞.地铁振动计算分析中的若干问题研究[D].上海:同济大学,2005.Shen X.Study on the problems in the analysis of sub-way-induced vibration[D].Shanghai:Tongji Universi-ty,2005.
[16]袁晓铭,孙锐,孙静,等.常规土类动剪切模量比和阻尼比试验研究[J].地震工程与工程振动,2000,20(4):133-139.Yuan X M,Sun R,Sun J,et al.Laboratory experi-mental study on dynamic shear modulus ratio anddamping ratio of soils[J].Earthquake Engineeringand Engineer Vibration,2000,20(4):133-139.
[17]王田友,丁洁民,楼梦麟.地铁运行引起场地振动的荷载与分析方法[J].工程力学,2010,27(1):195-201.Wang T Y,Ding J M,Lou M L.Load for subway-in-duced free field vibration and analysis method[J].En-gineering Mechanics,2010,27(1):195-201.
[18]黄雨,叶为民,唐益群,等.上海软土场地的地震反应特征分析[J].地下空间与工程学报,2005,1(5):773-778.Huang Y,Ye W M,Tang Y Q,et al.Characteristicanalysis for seismic ground response of soft soils inShanghai[J].Chinese Journal of Underground Spaceand Engineering,2005,1(5):773-778.
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