六肢格构钢管混凝土拱桥设计与施工

Design and Construction of Six-leg Lattice Concrete-filled Steel Tube Arch Bridge

以某六肢格构钢管混凝土拱桥为例,介绍了该桥主桥的总体设计、施工方案及结构计算。该桥主桥采用钢管混凝土变截面桁架拱桥方案,拱肋采用钢管混凝土,腹杆、横联、米撑、立柱及帽梁均采用钢结构。拱桥计算跨径为300m,拱轴线采用悬链线,拱轴系数为1. 543,矢高为54. 545m,矢跨比为1/5. 5。对该桥的设计、施工、静力计算进行了详细介绍。

This paper introduces the overall design,construction scheme and structure calculation of a sixleg lattice concrete-filled steel tube arch bridge,taking it as an example.The main bridge of this bridge adopts the scheme of concrete-filled steel tube truss arch bridge with variable section,the arch rib adopts concrete-filled steel tube,the abdomen pole,transverse link,meter brace,column and cap beam all adopt steel structure.The calculated span length of the arch bridge is 300m,the arch axis is catenary,the arch axis coefficient is 1.543,the vector height is 54.545m,and the vector span ratio is 1/5.5.The design,construction and static calculation of the bridge are introduced in detail.