赤木高墩特大钢构桥的施工过程控制技术研究  

Research on construction process control technology of Chimu high piers extra large steel frame bridge

作　　者：余江舟 YU Jiangzhou(China Energy Construction Gezhouba Group Road and Bridge Engineering Co.,Ltd.,Yichang 443000,China)

机构地区：[1]中国能建葛洲坝集团路桥工程有限公司,湖北宜昌443000

出　　处：《中国高新科技》2023年第24期113-116,共4页

摘　　要：由于我国西南部特殊的地形地貌,高墩大跨连续刚构桥逐渐成为桥梁建设的主要桥型之一。文章以赤木特大桥的施工控制为研究背景,根据该桥的施工计划和施工方法,建立了相应的施工控制体系。通过采用Midas/Civil有限元软件建立施工过程的仿真模型,得到理论上的应力和线形,并将其作为控制目标指导现场施工。通过对现场实测值与理论值的对比分析得出结论:各梁块张拉后实测标高与理论标高在数值上基本一致,并且变化趋势也基本一致,与设计线形相符;各梁块预应力钢束张拉后实测应力与理论应力变化规律相符,符合悬臂施工阶段的受力特征。Due to the special terrain and landform in southwest China,the continuous steel frame bridge with high piers and long spans has gradually become one of the main types of bridges in bridge construction.This article takes the construction control of Chimu Extra Large Bridge as the research background,and establishes a corresponding construction control system based on the construction plan and construction method of the bridge.By using Midas/Civil finite element software to establish a simulation model of the construction process,theoretical stress and linearity are'obtained,which are used as control objectives to guide on-site construction.Through the comparative analysis of on-site measured values and theoretical values,it is concluded that the measured elevation after the tensioning of each beam block is basically consistent with the theoretical elevation in numerical value,and the change trend is basically consistent,which is consistent with the design linearity;the measured stress after the tensioning of each beam block's pre-stressed steel strands is consistent with the theoretical stress change law,which is in line with the stress characteristics of the cantilever construction stage.

关 键 词：赤木特大桥 刚构桥 施工控制 

分 类 号：U445[建筑科学—桥梁与隧道工程]