摘要
广安官盛渠江大桥主桥跨度320 m,是已建成的世界最大跨度中下承式钢筋混凝土肋拱桥[1]。大桥主拱肋采用等宽变高度梯形截面构造、箱形截面横撑构造,结构稳定、轻盈,兼顾了受力及景观;主拱采用超高强钢管混凝土强劲骨架外包混凝土成拱,骨架主弦钢管内首次灌注C100超高强混凝土,骨架腹杆采用空心钢管替代传统型钢腹杆,解决了传统骨架强度弱、稳定性差的技术难题;拱肋混凝土分两环成拱,大大节省了工期,提高了施工安全性。该桥技术新颖,为300 m及以上级别的钢筋混凝土肋拱桥建造提供了新的思路。
The main span 320 m of Guangan Guansheng Qujiang Bridge is the largest through reinforced concrete rib arch bridge built in the World.The main arch rib of the bridge is a trapezoidal section structure with constant width and varying height and a box cross-section strut structure,which is stable and light,and takes into account the stress and landscape.The main arch is a super-high strength concrete-filled steel tube and strong skeleton outer-wrapped concrete arch.The main chord steel tube of the skeleton is firstly filled with C100 super-high strength concrete.The hollow steel tube is used for the skeleton web member to replace the traditional steel web member,which solves the technical problems of weak traditional skeleton strength and poor stability.The arch rib concrete is formed in two rings,which greatly saves the construction period and improves the construction safety.The new technology of the bridge provides a new idea for the construction of reinforced concrete rib arch bridges of 300m and above.
作者
王戈
范碧琨
梁健
WANG Ge;FAN Bikun;LIANG Jian
出处
《城市道桥与防洪》
2020年第12期75-77,83,M0010,共5页
Urban Roads Bridges & Flood Control
关键词
钢筋混凝土拱桥
肋拱桥
钢管混凝土结构
劲性骨架
C100
reinforced concrete arch bridge
rib arch bridge
concrete-filled steel tube structure
stiff skeleton
C100
