自锚式悬索桥大跨度钢箱梁顶推施工技术研究  

Research on Construction Technologies for Steel Box Girder During Incremental Launch of Long Span Self-anchored Suspension Bridge

作　　者：汪健[1] 方诗圣[1,2] 陈建林[1] 张震[1] 

机构地区：[1]合肥工业大学土木与水利工程学院,合肥市230009 [2]安徽省交通规划设计研究院,合肥市230088

出　　处：《公路》2014年第1期56-60,共5页Highway

基　　金：安徽省2009年交通科技进步计划(2009-11)资助

摘　　要：蚌埠淮河公路桥采用80m+200m+80m双塔对称钢箱梁自锚式悬索桥,采用顶推施工技术。结合工程的实际概况,对钢箱梁顶推施工提出两种不同的施工方案,一种是传统的拖动式顶推,一种是步履式顶推方案。采用有限元软件进行施工模拟分析,得出两种顶推方案的最危险工况,并分析最危险工况条件下的钢箱梁应力分布和稳定因子,结果表明传统的顶推施工方案局部最大应力基本等于材料临界安全强度,安全盈余不足,而步履式顶推方案则有较大的安全应力储备,同时其稳定因子比传统的拖动式顶推方案高,不易出现材料失效现象。The main bridge of Huaihe River Highway Bridge on Daqing Road in Bengbu is a twfn towers symmetric steel box girder self-anchored suspension with span arrangement of 80 m＋200 m＋80 m, and adopting incremental launching construction technology. Combined with the engineering practical overview, two different construction schemes for incremental launching methods are put forward, one is the traditional drag push and the other is walking type pushing. Using the finite element software for construction simulation analysis, two kinds of pushing for the most dangerous condition are obtained, and the stress distribution and the stability factor under the most dangerous working conditions are analyzed. The results show that the local maximum stress of traditional pushing scheme is basically equal to the materials critical safety strength with surplus security deficiencies, and walking pusher scheme has a greater safety stress reserve, at the same time the stability factor of walking pusher is higher than the traditional drag type and not easy to appear the material failure phenomenon.

关 键 词：钢箱梁 自锚式悬索桥 顶推施工 应力分析 

分 类 号：U445.462[建筑科学—桥梁与隧道工程]