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目前,全国公路桥梁总座数已达29.4万座,计1065万延米,大部分桥梁建成于20世纪50-70年代,已经运营数十年,再加上超载、超限车辆的日益增多,大批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。桥梁维修与加固技术已在世界公路交通范围内引起关注,2001年,交通部确定了“十五”期间基本消灭国省干线公路上危桥的工作目标,目前,全国国省干线公路上的危桥共有5397座,要达到“十五”危桥改造的工作目标还有一定难度。为促进桥梁维修与加固技术的发展,保证维修与加固质量,提高现有桥梁的使用年限,从而节省大量建设资金,同时
At present, the total number of highways and bridges in the country has reached 294,000, accounting for 10.65 million meters. Most of the bridges were completed in the 1950s and 1970s and have been operating for decades. Coupled with the increasing number of overloaded and overrun vehicles, The technical status of the bridge can no longer meet the needs of traffic safety, can not meet the needs of modern heavy traffic, and is in urgent need of repair and reinforcement. In 2001, the Ministry of Communications established the target of basically eliminating the dangerous bridges on the trunk highways of the provinces and autonomous regions during the “15th Five-Year Plan” period. At present, on the national highway across the country, Of the dangerous bridge a total of 5397, to achieve “fifteen ” dangerous bridge reconstruction goal is still a certain degree of difficulty. In order to promote the development of bridge repair and reinforcement technology, ensure the quality of maintenance and reinforcement, and improve the service life of existing bridges, thus saving a lot of construction funds, at the same time