系杆拱顶升混凝土质量控制及施工要点分析  

QUALITY CONTROL AND CONSTRUCTION ANALYSIS OF RISING CONCRETE IN TIE-ROD VAULT

作　　者：户高华 Hu Gao-hua

机构地区：[1]中铁十一局集团第二工程有限公司,湖北十堰442013

出　　处：《建筑技术开发》2022年第9期29-32,共4页Building Technology Development

摘　　要：随着铁路建设规模的增长,大跨度跨河、跨桥、跨路施工越来越多,系杆拱具有大跨度等优点,越来越多地被运用到基建建设中,系杆拱–混凝土组合施工越来越多,系杆拱混凝土一般为自密实补偿收缩混凝土,施工从拱脚一次性顶升到拱顶,混凝土顶升压力大,对混凝土流动性和压力泌水要求较高。结合灵江特大桥工程实际,详细阐述了自密实补偿收缩混凝土配合比适配及现场混凝土顶升施工质量控制,为系杆拱混凝土顶升施工提供参考。As the growth of the public railway construction scale, big span, span bridge across a river, across the road construction is more and more, bowstring arch bridge has the advantages of large span is more and more is applied to the construction of infrastructure, bowstring arch bridge construction is more and more, and concrete bowstring arch bridge is commonly self-compacting concrete compensation shrinkage concrete, construction from the roof arch foot one-time reaches the vault and concrete top pressure is big, The requirements for concrete fluidity and pressure bleeding are higher. Combined with the actual project of Lingjiang Bridge, this paper elaborates the mix ratio of self-compaction shrinkage compensating concrete and the quality control of concrete jacking construction on site, so as to provide reference for the jacking construction of tie arch concrete.

关 键 词：系杆拱 顶升 自密实补偿收缩混凝土 

分 类 号：TU74[建筑科学—建筑技术科学]