钢管混凝土桁式和哑铃形截面拱桥应用与对比  

Application and Comparison on CFST Arch Bridge with Rib of Truss and Dumbbell-Shaped Cross Section

作　　者：任进博 REN Jinbo(China Railway 16^(th)Bureau Group Metro Engineering Co.Ltd.,Beijing 100023,China)

机构地区：[1]中铁十六局集团地铁工程有限公司,北京100023

出　　处：《铁道建筑技术》2022年第11期120-125,共6页Railway Construction Technology

基　　金：中铁十六局集团有限公司科技研究开发计划项目(K2019-26C)。

摘　　要：为推动钢管混凝土拱桥的发展,对比分析了钢管混凝土桁式与哑铃形截面拱桥的发展历程、结构与拱肋构造、施工工艺及横向联系。分析结果表明:钢管混凝土桁式和哑铃形截面拱桥的经济跨径分别为180~300 m和60~120 m,主要结构体式分别为有推力拱和无推力拱;桁式和哑铃形截面拱桥主要拱轴线形分别为悬链线和抛物线,其中桁式截面拱肋的悬链线m的平均值比哑铃形截面大8%;桁式和哑铃形截面拱桥的矢跨比均主要分布在1/5~1/4,以1/5居多;桁式和哑铃形截面钢管混凝土拱桥的横向联系以“一”字撑和“K”撑两种截面形式为主,主要施工方法为悬臂法和支架法。To promote the development of concrete-filled steel tubular(CFST)arch bridges,comparison analysis has been conducted on CFST arch bridges with rib of truss and dumbbell-shaped cross section by the view of the developing evolution,structure and rib detailing,construction technology and lateral brace,respectively.It is found that the economic spans of CFST arch bridge with rib of truss and dumbbell-shaped cross section respectively are 180~300 m and 60~120 m,and structural systems adopted are arch with thrust and without thrust,respectively.The main arch bridge with rib of truss and dumbbell-shaped cross section are catenary and parabola respectively,wherein the average value of m of truss section arch rib is 8%larger than that of dumbbell-shaped section.The range of rise to span ratio of CFST arch bridge with rib of truss and dumbbell-shape cross section is mainly distributed in 1/5~1/4,and 1/5 is at most.The type combining“一”crossbar and“K”crossbar is the main type of the lateral brace of CFST arch bridge above,the main construction method are cantilever method and scaffolding method.

关 键 词：钢管混凝土拱桥 桁式截面 哑铃形截面 

分 类 号：U448.22[建筑科学—桥梁与隧道工程]