可作为新震源的列车振动及实验研究  

VIBRATION INDUCED BY TRAINS: A NEW SEISMIC SOURCE AND RELATIVE TEST

作　　者：李丽[1] 彭文涛 李纲[1] 陈顒[1] 陈棋福[1] 汤毅[3] 

机构地区：[1]中国地震局分析预报中心,北京100036 [2]中国科学院地质与地球物理研究所,北京100029 [3]中国地震局地球物理研究所,北京100081

出　　处：《地球物理学报》2004年第4期680-684,共5页Chinese Journal of Geophysics

基　　金：国家自然科学基金项目 ( 4 0 3 72 0 94);科技部基础研究重大项目前期研究专项 ( 2 0 0 1CCA0 2 10 0 )

摘　　要：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 .Vibrations induced by train moving on railway tracks could arouse elastic waves in the shallow crust, which radiate on the ground surface in a long distance around the train lines. We recorded some of the ground waves along the Datong-Qinling railroad in Northern China, with two sets of broad-band and one set of short-period seismometers. 38 shock events on 9 sites were clearly recorded at a distance of 0～2.15km to the railroad. Observations show that the vibrations induced by a running train would cause significant ground trembling in a distance of 2～3km, and the flat frequency of the seismometers covers 0.05 to 20Hz. The broad frequency range and repeatability of the trembling indicates that the vibration could be used as a seismic source to detect shallow structures in the crust. It is expected that a new kind of exploration source with related new observing systems, new data processing methods and new crustal models will bring lights to the traditional exploration seismology.

关 键 词：列车振动 地壳结构 爆破地震学 新震源 

分 类 号：P315[天文地球—地震学]