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利用地震仪器对火车通过大同—秦岭铁路线产生的振动进行了观测 .观测中使用了两套宽频带地震仪和一套短周期地震仪 ,共获得距铁路 0～ 2 .15km的 9个观测点的 38次列车振动观测数据 ,全部记录均可分辨出清晰的地震波形 .研究表明 :运动列车会在铁路沿线 2～ 3km范围内产生明显的地面振动 ,接收到的振动频谱在0 .0 5～ 2 0Hz范围内平坦 ,信号频带较宽 ,观测重复性好 .列车振动为利用地震勘探方法探测地下浅层结构提供了一种重复性很好的新震源
Seismographs were used to observe the vibration of the train passing the Datong-Qinling Railway.The two wide-band seismometers and a set of short-period seismographs were used in the observation, and a total of 9 observation points from 0 to 2.15 km from the railway The 38th train vibration observation data of the train can clearly identify the clear seismic waveforms.The research shows that the train can produce obvious ground vibration within the range of 2 ~ 3km along the railway line, and the received vibration frequency spectrum is between 0,05 ~ It is flat in the range of 2 0 Hz and has a wide frequency band and good observational repeatability.The train vibrations provide a very good repetitive new source for seismic exploration of shallow structures in the underground