随着国民经济高速发展而带来的交通量迅速增长和车辆载重的不断增加,使公路桥梁面临的压力越来越大,以往旧标准设计的公路桥梁,其承载力越来越不能满足汽车运输急剧发展的需要。据专家估计,凡达不到现有设计标准和通车要求的一些公路桥梁和路面破损严重以及弃养失修的陈年老桥都将进行维 With the rapid development of the national economy brought about by the rapid traffic growth and increasing vehicle loads, the pressure on the highway bridges is increasing. In the past, the old standard designed highway bridges, the carrying capacity of which is less and less able to meet the needs of motor transport The need for rapid development. According to experts’ estimates, some old bridges that have failed to meet the existing design standards and opened to traffic and some of which have been damaged severely and abandoned old ones will undergo maintenance