Abstract:In order to determine the sections with potential wind disasters along the high-speed railway and reduce the occurrence of floating objects invasion disasters caused by strong winds, based on the observation data of meteorological stations along the high-speed railway in Tianjin, high-resolution series of satellite remote sensing image data, historical disaster of high-speed railway and basic geographic information, this article analyzes the impact of strong wind on the invasion disaster of light floating objects and proposes the wind speed threshold range and dominant wind direction of disasters in different regional sections of the Tianjin High-Speed Railway. Then, based the risk assessment theory of natural disasters, the meteorological risk analysis model of the wind-induced light floating objects invasion disaster of high-speed railway is established, and the risk zoning is formed. The results show that the invasion disasters of light floating objects along the high-speed railway mainly occur in spring and winter, accounting for 73.75% of the total invasion disasters of the whole year. The most concentrated occurrence time is from 12:00 BT to 15:00 BT in the afternoon, with most seen in the central and eastern parts of Tianjin and then in the northwestern and the southwestern parts in order. Disasters mainly occur in the wind speed range with the maximum wind speed of 8-17 m·s-1 and extreme wind speed of 13-21 m·s-1. When the wind direction is from west to north and the wind direction is at the angle of more than 45 ° with the line, disasters are more likely to occur. By means of satellite remote sensing technology, the distribution of hidden dangers along the Tianjin High-Speed Railway could be well identified, and the highest identification accuracy could reach 72.7%. Based on the characteristics of wind speed and wind direction and the distribution of hidden dangers, the meteorological risk analysis model of the Tianjin High-Speed Railway wind disaster is established, and the zoning results show that the Beijing-Shanghai High-Speed Railway and the Beijing-Tianjin Intercity Railway have higher risks, followed by the Tianjin-Qinhuangdao High-Speed Railway, and the Tianjin-Bazhou Passenger Dedicated-Line has the lowest risk. High risk sections are mainly concentrated in first, the north of the Wuqing District, Beichen District and Xiqing District of the Beijing-Shanghai High-Speed Railway, second, the Beichen District, the east of the Dongli District and the Binhai New Area section of the Beijing-Tianjin Intercity, and third, the east of the Dongli District of the Tianjin-Qinhuangdao High-Speed Railway.