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1981年的洪水,造成宝成线多处坍方断道,中断行车近2个月之久,是宝成线建成以来所发生的最严重、规模最大的一次病害。宝成线病害工点主要分为两类:一是防治坍方、滑坡、泥石流;二是防治危岩落石。病害工程大部分为明洞,其中又以洞口接长明洞为主,由于洞口地形多为横坡陡峻,已开挖成半路堑,就出现许多长腿明洞工程。仅根据我院19队勘测设计范围内一般明洞工程的10个工点统计,在总长为755.79米的明洞中,就有332.5米的长腿明洞,约占44％。
The floods in 1981 caused a series of breakdowns of the Baocheng Line and the suspension of traffic for nearly two months. This was the most serious and largest disease ever since Baocheng Line was completed. Po-line plant disease points can be divided into two categories: First, prevention and control landslides, landslides, debris flow; second is to prevent and control rockfall. Most of the disease works are Myeong-dong, which takes Chang-dong as its main point. Due to the steep slope on the slope, many long-legged Myeong-dong projects have emerged. According to the statistics of 10 work stations in the general Myeongdong project surveyed and surveyed by 19 teams in our institute, there are 332.5 meters of long-legged Myong-dong in the total length of 755.79 meters, accounting for about 44%.