摘要
武汉罗家港互通主桥采用85 m下承式简支桁架拱,为双向6车道城市桥梁。桁架拱桥横向布置2片拱肋,间距29.4 m,拱肋矢高16.9 m,矢跨比为1/6;拱肋、系杆及腹杆均采用带板式加劲肋的焊接箱型截面,拱肋间设置3道箱型截面风撑;桥面系采用密布横梁的正交异性板;桥墩采用m型门式墩,基础采用钻孔灌注桩群桩;拱桥采用支架拼装、顶推施工。
The main bridge of Wuhan Luojiagang Interchange is a double-way six-lane urban bridge with the 85-m through simple-support truss arch.Two arch ribs are arranged horizontally,the spacing is 29.4 m,the rise of arch rib is 16.9 m and a rise span ratio is 1/6.Arch ribs,tie bars and web members adopt the welded box sections with plate-type stiffening ribs,and three box section wind braces are set between arch ribs.The bridge deck system adopts the orthotropic slabs with dense beams.The pier is m-type portal pier,and the foundation is constructed of cast-in-situ bored pile group.The arch bridge is constructed by support assembly and incremental launching method.
出处
《城市道桥与防洪》
2023年第5期65-68,88,M0009,共6页
Urban Roads Bridges & Flood Control
关键词
桁架拱
拱肋
系杆
桥面系
结构分析
桥梁设计
施工方案
truss arch
arch rib
tie rod
bridge deck system
structural analysis
bridge design
construction scheme
