摘要
索塔大跨度下横梁常采用分层浇筑施工方法,在第一层混凝土浇筑完成后,临时张拉部分预应力,调节下横梁施工过程中的受力状态。以某斜拉桥H形索塔为依托,建立施工阶段有限元模型,对下横梁施工进行全过程分析。重点明确下横梁与支架之间荷载分配情况及临时预应力张拉数量控制要求,对落地式斜腿钢桁支架进行优化设计,并验证施工工艺的合理性及临时结构设计的可靠性,对类似工程施工具有一定指导意义。
The long-span lower beam of the cable tower often adopts the layered pouring construction method.After the first layer of concrete is poured,part of the pre-stressed steel strands are temporarily tensioned to adjust the stress state of the lower beam during the construction process.Relying on the H-shaped cable tower of a cable-stayed bridge,a finite element model of the construction stage is established to analyze the whole process of the construction of the lower beam.Focus on clarifying the load distribution between the lower beam and the support and the control requirements for the tension number of temporary prestressed steel strand.Optimizing the design of the floor-standing inclined steel truss bracket,and verifying the rationality of the construction process and the reliability of the temporary structure design,which has a guiding significance for the construction of similar projects.
作者
徐登云
陈太雷
XU Dengyun;CHEN Tailei(China Tiesiju Civil Engineering Group Co.,Ltd.,Hefei 230023,China;College of Transportation Engineering,Nanjing Tech University,Nanjing 210009,China)
出处
《现代交通技术》
2022年第2期35-38,54,共5页
Modern Transportation Technology
基金
江苏省住房和城乡建设厅科技指导性项目(2019ZD001118)
江苏省重点研发计划(社会发展)项目(BE2019613)。
关键词
索塔
下横梁
分层浇筑
预应力
全过程分析
cable tower
lower beam
layered pouring
prestressing force
whole process analysis
作者简介
第一作者:徐登云(1984-),男,高级工程师,主要从事桥梁工程研究工作。
