京沪高速铁路地震预警系统的方案及关键参数研究

京沪高速铁路及沿线区域跨越 4个主要的地震带 ,带内地震活动活跃 ,地震是对高速列车行车安全危害最大的自然灾害。在对京沪高速铁路及沿线区域地震危险性调查的基础上 ,对地震预警系统的构成、监测设备的设置方案及报警模式等一些关键问题进行了研究。通过对京沪高速铁路各类典型构筑物的大量的地震响应统计分析 ,给出了机械式地震仪的预警水平 ,并提出了适于P波检测的M -R判别标准 ,为京沪高速铁路安全监控系统中地震预警系统的建设提供理论依据。

Study on Schemes and Key Parameters of Seismic Alarm System for Beijing-Shanghai Express Railway

Beijing-Shanghai express railway and its neighboring areas span over four major seismic belts, in which the occurrence of earthquake is rather active. Earthquake is the most serious disaster regarding to the safety and stability of the running express trains. Based on the seismic hazard investigation to the related areas, some key issues are studied such as the frame of the seismic alarm system, the layout scheme of the monitoring device and the alarm patterns. By a lot of statistical analysis of seismic responses of various typical structures, the alarm threshold of mechanical-driven seismometer is derived, and M-R criterion to P wave detection is put forward. All these will serve as reliable theoretical support in the construction of the seismic alarm system for safety monitoring of Beijing-Shanghai express railway.