Acta Scientiarum Naturalium Universitatis Pekinensis ›› 2019, Vol. 55 ›› Issue (5): 839-849.DOI: 10.13209/j.0479-8023.2019.073

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Extraction of Characteristics of Wavefield under Viaduct Produced by High-Speed Rail

BAO Tiezhao1,2, NING Jieyuan1,2,†, ZHANG Xianbing1   

  1. 1. School of Space and Earth Sciences, Peking University, Beijing 100871 2. The Joint Research Group on High-Speed Rail Seismology, Beijing 100029
  • Received:2019-07-14 Revised:2019-08-14 Online:2019-09-20 Published:2019-09-20
  • Contact: NING Zhiyuan, E-mail: njy(at)pku.edu.cn

高架桥下方高铁地震波场的特征量提取

鲍铁钊1,2, 宁杰远1,2,†, 张献兵1   

  1. 1. 北京大学地球与空间科学学院, 北京 100871 2. 高铁地震学联合研究组, 北京 100029
  • 通讯作者: 宁杰远, E-mail: njy(at)pku.edu.cn
  • 基金资助:
    国家自然科学基金(41874071)资助

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Abstract:

The seismic signal propagating along the viaduct of a high-speed rail when the train is approaching or departing is extracted by cross-correlation method. Stable average cross-correlation function can be obtained by stacking the cross-correlation functions of different trains. The average cross-correlation function can be used as the characteristic quantity of the wavefield produced by high-speed rail. This quantity has potential to monitor the structural changes of the high-speed rail viaduct.

Key words: wavefield of high-speed railway, cross-correlation function, passive monitoring

摘要：

通过互相关方法, 提取高铁列车经过前后沿着高铁桥梁传播的地震波信号。将不同车次的互相关函数叠加, 得到稳定的平均互相关函数, 可以作为高铁地震波场的特征量。该特征量有监测高铁桥梁结构变化的潜力。

关键词: 高铁地震波场, 互相关函数, 被动监测

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