列车运行对周围地面振动影响的试验研究

针对日益严重的轨道交通引起的环境振动问题，通过对京―广铁路线附近某小区内地面的竖向、横向振动速度和加速度的现场测试，研究了运行列车引起的地面振动及其传播规律。由试验分析可知，列车引起的地面振动速度、加速度振级均随着列车速度的提高和轴重的增加而增大。速度每小时提高10 km时，速度振级和加速度振级均增大约3 dB；车速相同的货车比客车引起的速度振级竖向大10 dB左右，横向大5～15 dB左右；加速度振级竖向大 12 dB，横向大8 dB。钢轨接缝附近地面的振动比无接缝附近的地面振动大，速度振级大2～6 dB。振动随着距振源距离的增大而逐渐减小，竖向振级的衰减过程表现出一定的波动性；横向振级的衰减随距离增大单调减小。

Experimental study of ground vibrations induced by moving train

To study more and more serious vibrations problem induced by moving train traffic in urban areas, in a residential district near Jing-Guang Railway, field tests of velocity and acceleration vibrations of ground were carried out during train moving; and some conclusions were drawn. It is shown that the vibrations of ground due to moving train rise with train speed or axle load increasing. Generally, when speed of train increases 10 km per hour, the vibrations level raises 3 dB, while at the same speed, vibra...