南宁市竹溪大道立交匝道桥设计  

Design of Ramp Bridges of Zhuxi Avenue Interchange in Nanning

作　　者：聂建国[1] 樊健生[1] 何志芬 黄德耕 

机构地区：[1]清华大学土木工程系,北京100084 [2]广西交通规划勘察设计研究院,广西南宁530011

出　　处：《桥梁建设》2005年第4期35-37,47,共4页Bridge Construction

基　　金：国家杰出青年科学基金项目(50025822);交通部西部交通建设科技项目(0130020)

摘　　要：南宁市竹溪大道立交匝道桥上部结构采用预应力钢-混凝土连续组合梁结构,匝道半径分别为80 m和50 m。介绍该桥的设计及施工特点,包括结构方案的选择、混凝土顶板裂缝的控制、支座和支承体系的布置等。The superstructures of the Ramp Bridges of Zhuxi Avenue Interchange in Nanning are designed as prestressed steel-concrete composite continuous beams laid out on curved lines respectively in radii of 80 m and 50 m. In this paper, the design and construction features of the Bridges are presented, in which selection of structure alternatives, control of cracking in concrete top slabs and arrangement of hearings and supporting systems are included.

关 键 词：匝道 钢-混凝土组合梁 裂缝 预应力 

分 类 号：U442.5[建筑科学—桥梁与隧道工程] TU398[交通运输工程—道路与铁道工程]