改革开放以来,我国公路交通发生了巨大的变化。到2000年我国已有公路隧道1684处,总长达628公里。截止2001年底,我国公路通车里程已超过169万公里,其中高速公路已突破2万公里,一个干支衔接、布局合理、四通八达的全国公路网已初步形成。随着公路建设的突飞猛进,对公路桥梁建设提 Since the reform and opening up, tremendous changes have taken place in the road traffic in our country. By 2000, China has 1684 highway tunnels with a total length of 628 km. By the end of 2001, the mileage of our country’s roads opened to traffic has exceeded 1.69 million kilometers, of which the expressway has exceeded 20,000 kilometers. A nationwide road network with a well-connected and rational layout and extending in all directions has been formed. With the rapid development of highway construction, the construction of highway bridges