西溪河大跨径钢管混凝土拱桥连续梁顶推法施工过程受力分析  

Stress Analysis on Incremental Launching Construction Process of Continuous Beam of Long-span Concrete-filled Steel Tube Arch Bridge over Xixi River

作　　者：樊开盼 黄欣[2] 陈国胜[2] FAN Kaipan;HUANG Xin;CHEN Guosheng(Tianjin Chengjian University,Tianjin 300384,China;China Railway 18th Bureau Group Co.,Ltd.,Tianjin 300222,China)

机构地区：[1]天津城建大学,天津300384 [2]中铁十八局集团有限公司,天津300222

出　　处：《天津城建大学学报》2016年第4期278-281,286,共5页Journal of Tianjin Chengjian University

基　　金：住建部科学技术项目(2015-K3-021);天津市自然科学基金项目(13JCYBJC19600);天津市交通运输委员会科技项目(2014-23)

摘　　要：以西溪河大跨径钢管混凝土拱桥为工程依托,研究了拱上钢箱连续梁基于无导梁和临时墩的顶推法施工技术,确定了合理的顶推力及顶推量.通过建立MIDAS有限元数值模型,研究了不同顶推施工阶段中各不利工况下各墩柱处的支反力最大值,得到了顶推施工过程中主梁的弯矩包络图.With the long-span concrete-filled steel tube arch bridge over Xixi River as the project background,this paper researched on incremental launching construction technology of steel box continuous beam above the arch without launching noses and temporary piers and determined the reasonable incremental launching force and amount.By the establishment of the finite element numerical model,this paper studied the maximum bearing reaction of each pier column in adverse conditions at different stages of incremental launching construction,and got the bending envelope diagram of the main beam in the process of incremental launching.

关 键 词：顶推法 连续梁 不利工况 支反力最大值 顶推量 

分 类 号：U448.215[建筑科学—桥梁与隧道工程]