近年来，公路建设事业蓬勃发展，路面等级在不断提高，然而一些地方支线公路桥涵的老化和损坏现状越来越成为制约经济发展的瓶径，严重影响地方人民群众的生命财产安全。笔者通过调查，发现其主要原因是：一、支线公路的桥涵大多数是二十世纪五、六十年代修建的低标准的或者是 In recent years, the cause of highway construction has flourished and the level of pavement has been continuously improved. However, the aging and damage status quo of bridges and culverts in some parts of the country have increasingly become the bottleneck restricting economic development and seriously affecting the life and property safety of local people. The author through the survey found that the main reasons are: First, most of the bridges and culverts of the highway is built in the 1950s and 1960s, the low standard or