重载列车引起地面振动的实测分析

Measurement and Analysis of Ground Vibration Caused Heavy Haul Train

论述了重载列车引起周围环境振动的影响评估,结合某线重载铁路的一段地面振动实测加速度时程,分别在时域和频域内对实测结果进行了分析;采用1/3倍频程下计权振动加速度级作为振动评价量,发现重载列车产生的水平振动很大,与竖向振动相比不可忽略。结合我国新标准对环境振动进行评价,为铁路沿线构筑物的隔振减振设计提供一定的依据。

The surrounding environment vibrations impact assessment caused by overloaded train was discussed.Combined with heavy-duty railway ground vibration acceleration time-history,we respectively analyzed the measured results in time domain and in frequency domain.One third octave lower weighted vibration acceleration level was used as the amount of vibration evaluation,and it is found that heavy-duty train of horizontal vibration is very big,and it should not be neglected in comparison with vertical vibration.Combined with China＇s new standard for environmental vibration evaluation,it provides a basis for isolation design of structures along the railway.