鹰厦铁路烧汤溪右线特大桥主桥设计

摘要

The main bridge of Shaotangxi right line major bridge on Yingtan to Xiamen railway is a concrete filled steel tubular tied arch bridge with 96 m span. Arch rib adopts single-box double-room section. Hanger adopts parallel wire strand. Full framing construction method of first beam, then arch is adopted. Structural stiffness and initial stretching force are determined though theoretical calculation and local finite element analysis. Stresses of tie beam and arch rib and deflection are controlled harmonically and partial structures of arch springer and anchorage zone of tie beam are designed in detail.%鹰厦铁路烧汤溪右线特大桥主桥为跨度96m的钢管混凝土系杆拱桥。拱肋为2条等高度哑铃型钢管混凝土截面，拱肋问用空心钢管桁架连接。梁体采用单箱双室截面，吊杆采用平行钢丝。采用先梁后拱满堂支架施工方法。通过理论计算和局部有限元分析确定了合理的拱、梁刚度和吊杆初张力，对系梁、拱肋的应力和变形进行了协调控制，对拱脚和系梁锚块局部构造做了细致地设计。