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近年来随着工农业生产迅猛发展,交通运输日益繁忙,过往车辆密度急剧坛加,特别是装载大型货物的超重车辆运行于现有公路,以致过去已建成的大量桥梁(包括闸坝上的公路桥)其设计荷载普遍不能满足现行运输车辆的需要。若将载重等级偏低的旧桥全部拆除,而新建符合当前载重标准的桥梁,这是完全办不到的事,并且在人力、物力上都是极大的浪费。这种情况在我省和其他省市都有不同程度的存在,所以要求找出一个投资少、见效快、不中断交通、技术上
In recent years, with the rapid development of industrial and agricultural production, transportation has become more and more busy with the rapid increase in the density of passing vehicles. In particular, overloaded vehicles carrying large cargoes run on the existing highways, resulting in a large number of bridges built in the past including the highway bridges ) Its design load generally can not meet the needs of the current transport vehicles. If all the old bridges with low load level are demolished, it is totally impossible to build a new bridge that meets the current standard of loading, and it is a waste of manpower and material resources. This situation in our province and other provinces and cities have varying degrees of existence, so ask to find a less investment, quick, do not interrupt traffic, technically