摘要
云南祥临澜沧江特大桥为主跨380 m的单跨钢-混组合加劲梁悬索桥,在加劲梁段的架设阶段,由于中跨加劲梁段的吊装等因素导致主跨侧主缆的水平分力要大于边跨侧。为了将索塔的塔根弯矩控制在容许范围之内,该桥不采用传统的预偏索鞍法而是采用了一种新的方法即通过边缆拽塔法来实现调整索塔在施工阶段的内力。并重点阐述了边缆拽塔方法的设计理念、关键技术及施工方法。该技术在国内尚属首例,国外也没有成熟的经验可循,它的成功实践对国内今后同类桥梁的设计施工具有重要的参考意义。
Yunnan Xianglin Lancang River Bridge is a single span suspension bridge with main span of 380 m and applies steel-concrete composite stiffening girder. During the installation stage of stiffening girder, the horizontal component force of main cable in main span is bigger than in side span. In order to control the bending moment in the lowerest section of the pylon within the allowable limit, the method of pulling pylon with stressing side main cable is applied to adjust the pylon＇s stress during the construction stage. The design idea, the key technologies and construction of this method is elaborated.The method is first used in China and there is no successive overseas experience. Its practice will present the important reference to the design and construction of similar bridges.
出处
《公路交通科技》
CAS
CSCD
北大核心
2007年第10期104-107,共4页
Journal of Highway and Transportation Research and Development
关键词
桥梁工程
悬索桥
边缆拽塔
施工控制
索塔
钢-混组合加劲梁
bridge engineering
suspension bridge
pulling pylon with stressing side main cable
construction control
pylon
steel-concrete composite stiffening girder
