【摘要】 在京广铁路线附近进行了现场试验,测试分析了速度在21km/h―128km/h范围内运行列车引起的地面振动。结果表明:运行列车引起的地面振动的频率集中在10Hz―100Hz,车速对地面水平向振动的频率有一定影响;地面振动随至振源距离的增大呈波动性衰减;货物列车引起的地面加速度振级在各个方向上均明显大于旅客列车,其差值一般在10dB左右;列车引起的地面竖向振动大于两个方向的水平向振动,竖向振级为60dB―110dB;垂直线路的水平向振级为50dB―95dB;平行线路的水平向振级为55dB―80dB;线路附近的地面振动超过了我国关于环境振动规范的规定,说明运行列车引起的环境振动问题应当引起重视。更多还原

【Abstract】 A field experiment was carried out near the Beijing-Guangzhou railway line to study the ground vibrations induced by running trains.The train speed in the experiment was from 21km/h to 128km/h.The experimental results show that the frequencies of ground vibrations induced by moving trains range from 10Hz to 100Hz and train speed has some effect on the horizontal vibration frequencies.Generally,the ground vibration levels attenuate with the distance to the track with certain waving patterns.The ground vibrations induced by freight trains are about 10dB bigger than those by passenger trains in three directions.The vertical vibration is greater than those of the other two directions:which are 60dB―110dB in vertical,50dB―95dB in horizontal and perpendicular to the track,and 55dB―80dB in horizontal but parallel to the track,respectively.The measured ground vibrations near the tracks induced by running trains exceed the allowance given in the relevant code for environmental vibrations,which shows that the running-train-induced environmental vibrations and the related prevention measures should be further studied.更多还原