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先简支后连续桥梁结构是指两跨及以上预应力混凝土梁利用现浇混凝土构成的连续结构,其具有伸缩缝少、变形小、刚度大、行车舒适、施工工期短及经济效益高等优点。随着我国高等级公路建设里程的增加,先简支后连续桥梁的应用范围随之扩大。本文结合工程实例,简要分析先简支后连续桥梁的施工技术。
The first simply supported and continuous bridge structure refers to the continuous structure made of cast-in-place concrete with two spans and above of prestressed concrete beams. It has the advantages of less expansion joints, less deformation, greater rigidity, comfortable driving, shorter construction period and higher economic benefits. With the increase of mileage of high-grade highways in our country, the scope of application of continuous bridges after simple support is expanded. Based on the engineering examples, this paper briefly analyzes the construction technology of the first simply supported continuous bridge.