摘要
节段拼装体外预应力混凝土技术具备施工速度快、施工质量好、对现有交通及周边环境影响小等优点,在混凝土桥梁结构中的应用越来越广泛。主要结合某逐跨施工50 m节段拼装体外预应力混凝土桥梁的设计,对逐跨施工节段拼装体外预应力混凝土箱梁的主要构造、设计计算方法、施工方法、耐久性能、经济性等进行评述,与常规体内预应力混凝土箱梁进行对比分析并对其结构特点进行总结,为同类型桥梁结构的设计提供参考。
Precast segmental externally prestressed structures are more widely used in recent years due to the advantages such as fast construction speed, good quality, low disturbance to traffic and environmental. This paper presents characteristics and design as well as construction methods of the precast segmental externally prestressed bridge. Economical efficiency of such kind of structural system were analyzed. Design of a 50 m span box girder bridge was described and the features of externally prestressed concrete and internally prestressed concrete were compared.
出处
《结构工程师》
北大核心
2015年第6期1-6,共6页
Structural Engineers
关键词
预应力混凝土
体外预应力
节段拼装施工
短线预制法
prestressed concrete； external prestressing； segmental precast construction； short-termprecast method
