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铁路混凝土桥梁向长大跨度发展的主要障碍是混凝土梁自重太大,随着梁跨加长,梁重急剧增加。为了解决这一矛盾, 可以采取的措施有: 1.发展新型结构,如:箱型梁,桁架桥; 2.采用轻混凝土;
The main obstacle to the development of the railway concrete bridge to the long span is that the concrete girder weighs too much. As the beam span lengthens, the beam weight increases sharply. In order to solve this contradiction, the measures that can be taken are: 1. To develop new structures such as box girders and truss bridges; 2. To use lightweight concrete;