季节冻土区冬季列车行驶路基振动反应研究
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摘要
为了研究季节冻土区行驶列车引起的含冻土层铁路路基的振动反应特性,在大庆地区季节冻土场地进行了冬季现场试验。试验结果表明:列车行驶产生的路基振动加速度在近轨处具有周期性变化的特征,随着监测点距轨道距离的增大,其周期特性逐渐减弱并消失;季节冻土层的存在对路基竖向振动具有放大作用;列车行驶引起的路基振动加速度随与铁轨距离的增加而减小,并以竖向振动衰减最快;列车行驶过程中会引起环境振动问题,随着距铁轨距离的增大,垂向加速度振级呈递减趋势,时速越小则降幅越大,货车由于轴重大,衰减幅度低于普通客车。
In order to study the characters of subgrade vibration with frozen layer induced by the rail transit in the seasonally frozen region,the field monitoring experiment was carried on the seasonal frozen soil area in Daging. The result shows that the vibration acceleration of the subgrade induced by the train has the characteristics of periodic changes,and the characteristics of decrease and gradually become lost in cyclicity with the increase of distance monitoring stations to the center line of the railway are vertical; The existence of seasonally frozen layer have amplification effect to the subgrade vertical vibration; The accelerations of the subgrade induced by the train load decrease with the increase of the distance from the measured point to the railway,and the reduction is the factest of the vertical attenuation; The vertical vibration acceleration level shows a trend of decline with the increase of distance from the center line of the orbit and the speed is smaller,the greater the decline. Because of heavy axle load,the amplitude of attenuation of the truck is lower than ordinary passenger trains.
In order to study the characters of subgrade vibration with frozen layer induced by the rail transit in the seasonally frozen region,the field monitoring experiment was carried on the seasonal frozen soil area in Daging. The result shows that the vibration acceleration of the subgrade induced by the train has the characteristics of periodic changes,and the characteristics of decrease and gradually become lost in cyclicity with the increase of distance monitoring stations to the center line of the railway are vertical; The existence of seasonally frozen layer have amplification effect to the subgrade vertical vibration; The accelerations of the subgrade induced by the train load decrease with the increase of the distance from the measured point to the railway,and the reduction is the factest of the vertical attenuation; The vertical vibration acceleration level shows a trend of decline with the increase of distance from the center line of the orbit and the speed is smaller,the greater the decline. Because of heavy axle load,the amplitude of attenuation of the truck is lower than ordinary passenger trains.
引文
[1]于洋.冻土路基列车行驶振动反应研究[D].哈尔滨:哈尔滨工业大学,2006.YU Yang.Study on dynamic response of frozen embankment under train vibration load[D].Harbin:Harbin Institute of Technology,2006.
[2]王立娜,凌贤长,李琼林等.列车荷载下青藏冻结粉质黏土变形特性试验研究[J].土木工程学报,2012,45(增刊1):42-47.Wang Lina,Ling Xianzhang,Li Qionglin et al.Experimental analyses of train-induced deformation behavior of frozen silt clay[J].China Civil Engineering Journal,2012,45(1):42-47.
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[4]吴志坚,陈拓,马巍等.青藏铁路多年冻土区典型结构路基振动响应特性[J].上海交通大学学报,2011,45(5):716-727.Wu zhijian,Cheng tuo,Ma wei,et al.Characteristics of vibration response of typical structure embankments at Permafrost Regions Along the Qinghai-Tibet Railroad[J].Journal of Shanghai Jiaotong University,2011,45(5):716-727.
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[6]霍元坤,吴志坚,陈拓等。机车荷载下多年冻土区桥梁桩基振动响应特征[J].冰川冻土,2011,33(4):908-913.Huo Yuan-kun,Wu Zhijian,Chen Tuo et al.Characteristics of vibration response of bridge Pile foundation in permafrost regions under locomotive loading[J].Journal of Goaciology and Geocryolog,2011,33(4):908-913.
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[9]王立娜,凌贤长,张峰等.大庆季节冻土区冬季铁路列车行驶振动反应现场监测研究[J].中国科技论文在线,2009,4(7):507-511.Wang Lina,Ling Xianzhang,Zhang Feng,et al.Field monitoring on vibration acceleration response of railway in seasonal frozen region of Daqing induced by train-steering in winter[J].Sciencepaper Online,2009,4(7):507-511.
[10]许杰.软土地区铁路既有线动力响应测试及提速列车—路基动力作用特性研究[D].上海:上海交通大学,2011.XU Jie.Dynamic response test on exsiting railway and study on dynamic action characteristics between speed-increase trains and subgrand in subgrade in soft deposits[D].Shanghai,Shanghai Jiao Tong University,2011.
[11]徐瑞和.当前我国环境振动研究工作中急需澄清的若干概念[J].环境工程,1993,11(3):50-52.XU Ruihe.Some concepts our country environment vibration research work need to clarify at present[J].Environmental Engineering,1993,11(3):50-52.
[12]王福彤,陶夏新,崔高航等.地面城轨交通近轨道区域自由地表振动实测研究[J].振动与冲击,2011,30(5):131-135.Wang Futong,Tao Xiaxin,Cui Gaohang et al.Test in situ for free ground vibration near urban railway line[J].Journal of Virbration and Shock,2011,30(5):131-135.
[13]International standard organization(iso).ISO 2631,Guide for the evaluation of human exposure to whole-body vibration[S].2nd ed.Geneva,Switizerland:Iso secretariat,1978:1-7.
[14]陈国兴,陈斌,苏晓梅等.快速轨道交通运行引起的场地振动分析与评价[J].地下空间与工程学报,2008,4(1):26-32.CHEN Guoxing,CHEN Bin,SU Xiaomei,et al.Analysis and Evaluation of Ground Vibration Response Induced by Rapid Ra il Transit[J].Chinese Journal of Underground Space and Engineering,2008,4(1):26-32.
[15]魏鹏勃,夏禾,曹艳梅.地面线城轨列车引起的地面振动预测模型研究[J].地震工程与工程振动,2012,32(6):38-44.WEI Pengbo,XIA He,CAO Yanmei.A prediction model for field vibrations induced by urban trains of ground line[J].Journal of Earthquake Engineering and Engineering Vibration,2012,32(6):38-44.
[2]王立娜,凌贤长,李琼林等.列车荷载下青藏冻结粉质黏土变形特性试验研究[J].土木工程学报,2012,45(增刊1):42-47.Wang Lina,Ling Xianzhang,Li Qionglin et al.Experimental analyses of train-induced deformation behavior of frozen silt clay[J].China Civil Engineering Journal,2012,45(1):42-47.
[3]Ling Xianzhang,Zhang Feng,Zhu Zhanyuan,et al.Field experiment of subgrade vibration induced by passing train in a seasonally frozen region of Daqing[J].Earthquake Engineering and Engineering Vibration.2009,8:149-157.
[4]吴志坚,陈拓,马巍等.青藏铁路多年冻土区典型结构路基振动响应特性[J].上海交通大学学报,2011,45(5):716-727.Wu zhijian,Cheng tuo,Ma wei,et al.Characteristics of vibration response of typical structure embankments at Permafrost Regions Along the Qinghai-Tibet Railroad[J].Journal of Shanghai Jiaotong University,2011,45(5):716-727.
[5]施烨辉.列车荷载和冻融循环作用下冻土路基稳定性研究[D].北京:北京交通大学,2011.Shi Yehui.Stud yon stability of the subgrade under train loading and freez-thaw[D].Beijing:Beijing Jiaotong University,2011.
[6]霍元坤,吴志坚,陈拓等。机车荷载下多年冻土区桥梁桩基振动响应特征[J].冰川冻土,2011,33(4):908-913.Huo Yuan-kun,Wu Zhijian,Chen Tuo et al.Characteristics of vibration response of bridge Pile foundation in permafrost regions under locomotive loading[J].Journal of Goaciology and Geocryolog,2011,33(4):908-913.
[7]黄志军,赖远明,李双洋等.交通荷载作用下冻土路基动力响应分析[J].冰川冻土,2012,34(2):418-426.Huang Zhijun,Lai Yuanming,Li Shuangyang et al.Dynamic response of embankment in permafrost regions under traffic load[J].Journal of Goaciology and Geocryolog,2012,34(2):418-426.
[8]朱占元.青藏铁路列车行驶多年冻土场地路基振动反应与振陷预测[D].哈尔滨:哈尔滨工业大学,2009.ZHU Zhanyuan.Train-induced vibration response and subsidence prediction of permafrost subgrade along Qinghai-tibet railway[D].Harbin:Harbin Institute of Technology,2009.
[9]王立娜,凌贤长,张峰等.大庆季节冻土区冬季铁路列车行驶振动反应现场监测研究[J].中国科技论文在线,2009,4(7):507-511.Wang Lina,Ling Xianzhang,Zhang Feng,et al.Field monitoring on vibration acceleration response of railway in seasonal frozen region of Daqing induced by train-steering in winter[J].Sciencepaper Online,2009,4(7):507-511.
[10]许杰.软土地区铁路既有线动力响应测试及提速列车—路基动力作用特性研究[D].上海:上海交通大学,2011.XU Jie.Dynamic response test on exsiting railway and study on dynamic action characteristics between speed-increase trains and subgrand in subgrade in soft deposits[D].Shanghai,Shanghai Jiao Tong University,2011.
[11]徐瑞和.当前我国环境振动研究工作中急需澄清的若干概念[J].环境工程,1993,11(3):50-52.XU Ruihe.Some concepts our country environment vibration research work need to clarify at present[J].Environmental Engineering,1993,11(3):50-52.
[12]王福彤,陶夏新,崔高航等.地面城轨交通近轨道区域自由地表振动实测研究[J].振动与冲击,2011,30(5):131-135.Wang Futong,Tao Xiaxin,Cui Gaohang et al.Test in situ for free ground vibration near urban railway line[J].Journal of Virbration and Shock,2011,30(5):131-135.
[13]International standard organization(iso).ISO 2631,Guide for the evaluation of human exposure to whole-body vibration[S].2nd ed.Geneva,Switizerland:Iso secretariat,1978:1-7.
[14]陈国兴,陈斌,苏晓梅等.快速轨道交通运行引起的场地振动分析与评价[J].地下空间与工程学报,2008,4(1):26-32.CHEN Guoxing,CHEN Bin,SU Xiaomei,et al.Analysis and Evaluation of Ground Vibration Response Induced by Rapid Ra il Transit[J].Chinese Journal of Underground Space and Engineering,2008,4(1):26-32.
[15]魏鹏勃,夏禾,曹艳梅.地面线城轨列车引起的地面振动预测模型研究[J].地震工程与工程振动,2012,32(6):38-44.WEI Pengbo,XIA He,CAO Yanmei.A prediction model for field vibrations induced by urban trains of ground line[J].Journal of Earthquake Engineering and Engineering Vibration,2012,32(6):38-44.
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