目前,全国公路桥梁总座数已达28.4万座,计1065万延米,但是,大部分桥梁建成于二十世纪五十至七十年代,已经运营数十年,再加上超载、超限车辆的日益增多,部分早期投入使用的桥梁的技术状况已不能满足行车安全的需要,不能适应现代化重交通量的需求,亟需进行维修与加固。 At present, the total number of highways and bridges in the country has reached 284,000, accounting for 10.65 million meters. However, most of the bridges were completed in the 1950s and the 1970s and have been operating for decades. Coupled with overloaded and overrun vehicles The technical status of some bridges put into operation early can no longer meet the needs of traffic safety and can not meet the needs of modern heavy traffic and there is an urgent need for maintenance and reinforcement.