一九八三年和一九八四年,兴安盟地区公路水毁极为严重,路基桥涵被冲毁多处,损失十万元,给客货运输和城乡人民往来带来很大困难,有认真研究如何防治公路水毁之必要。公路桥涵水毁的主要原因是桥涵淤塞或孔径小,渲泻量不够,经不住洪水冲击。 In 1983 and 1984, the water damage to roads in the Xingan League area was extremely serious. Subgrade bridges and culverts were destroyed in many places with a loss of 100,000 yuan, which brought great difficulties to passenger and freight transport and the people in both urban and rural areas. How to prevent and control highway water damage. The main reason for the destruction of highway bridges and culverts is that bridges and culverts are blocked or have a small aperture, and the amount of rendering and dropping is not enough, which can not withstand the impact of floods.