一、水害类型和分布1981年8月21日前后,宝成线西安铁路局管内宝鸡一广元段,在346.7公里的线路上,共发生水害822处,土石方总量达183万米~3。其中,两段总长约8公里的线路被洪水所漫,13座隧道变成了泄水洞,洞内壅水最高达5.3米;5座大、中桥主体被冲毁,5座大、中桥洪水高过梁底,9座桥的桥头路堤被冲空;39 I. Types and distribution of water hazards Before and after August 21, 1981, a total of 822 water hazards occurred on 346.7 km of Baoji-Guangyuan section of Baocheng Line Xi’an Railway Bureau. The total amount of earth and stone amounted to 1.83 million m3. Among them, the two sections of the total length of about 8 km of the route was flooded, 13 tunnels into a drainage hole, the cave water up to 5.3 meters; 5 large, the main bridge was destroyed, 5 large, medium Bridge flood high over the bottom of the bridge, nine bridge embankment was washed out;