摘要
贵州都格北盘江大桥主桥采用(80+2×88+720+2×88+80)m双塔双索面钢桁梁斜拉桥。主梁采用由钢桁架和正交异性钢桥面板结合的钢桁梁结构体系。通过在混凝土检修道、主桁弦杆内灌混凝土的压重形式平衡主、边跨恒载及活载的重量。全桥共设112对224根斜拉索,斜拉索上端锚固于上塔柱内的钢锚梁上,下端锚固于主桁架上弦杆的钢锚箱上。桥塔采用H形钢筋混凝土结构,桥塔基础采用28根直径2.8m的群桩基础。针对该桥特殊的地理位置和建设条件,对山区风荷载、钢桥面板结构体系、主梁架设方案及运营期斜拉索凝冻监测技术等进行研究,解决了大桥建设的技术问题。该桥已于2016年通车,目前运营状况良好。
The main bridge of the Beipanjiang Bridge is a cable-stayed bridge that has configurations of double-pylon double-cable plane steel truss girder with span arrangement(80+2×88+720+2×88+80)m.The main girder is a steel truss girder system composed of steel truss and orthotropic steel deck.The weight of dead load and live load on main and side spans is balanced by means of the ballast of concrete poured into the maintaining roadway and main truss chord.The bridge consists of 224 cables(112 couples),the upper end of the cable is anchored to the steel anchor beam in the upper pylon,and the lower end is anchored to the steel anchor box on the upper chord of the main truss.The bridge tower has a structure of H-shape reinforced concrete,and 28 pile foundation group with diameter of 2.8 m are employed for construction of its foundation.In view of the special geographical location and construction conditions of the bridge,we studied the wind load in mountainous regions,steel deck structure system,main girder erection scheme and the freezing monitoring technology of cable-stayed cables in operation stage,and solved the technical problems of bridge construction.This bridge was opened to traffic in 2016,and the operation is in good conditions.
作者
刘波
彭运动
侯满
LIU Bo;PENG Yun-dong;HOU Man(CCCC Highway Consultants Co.,Ltd.,Beijing 100088,China)
出处
《桥梁建设》
EI
CSCD
北大核心
2018年第6期81-86,共6页
Bridge Construction
基金
西部建设科技项目(201231835250)~~
关键词
斜拉桥
板桁结合钢桁梁
结构体系
边跨压重
风荷载
主梁架设
斜拉索凝冻监测
cable-stayed bridge
slab truss composite steel truss girder
structural system
ballast of side span
wind load
main girder erection
cable freeze monitoring system
