本桥在兰州车站东“咽喉区”,原是跨过三股铁路线的公路平交道口。兰州车站站场扩建后,原道口将由三股道增至八股道,平交道口更加不能适应铁路和市内交通的要求,也难以保证安全,因此决定改建为立交桥。 近几年来,全国各地为了解决铁路与城市交通平面交叉的干扰,用顶进箱形结构的方法修建了很多铁路立交桥,取得了成功经验。由 The bridge in the Lanzhou station east “throat area”, was originally crossed the three railway line road intersection. After the expansion of the Lanzhou Railway Station and Stations, the original crossing will be increased from three to eight. The level crossing will not be able to meet the requirements of railways and urban traffic. It will be difficult to ensure safety and will be converted into an overpass. In recent years, many railroad overpasses have been built with the method of jacking the box structure in order to solve the interference of railway and urban traffic plane crossings throughout the country and gained successful experience. by