天津和黄地铁广场基础底板大体积混凝土施工技术  

Construction Technology of Mass Concrete Foundation Slab in Tianjin Hehuang Subway Square

作　　者：陈学光[1] 訾勇[1] 杨红岩[1] 王东[1] 

机构地区：[1]中建八局天津建设工程有限公司,天津300450

出　　处：《施工技术》2009年第12期33-36,共4页Construction Technology

摘　　要：通过对天津和黄地铁广场工程基础底板施工技术研究,系统总结了超高层基础底板大体积混凝土综合施工技术,包含大体积混凝土配合比设计技术、自身温度试验技术、不同掺和料对混凝土内部温度影响、场地狭窄条件下混凝土浇筑施工组织设计,以及大体积混凝土养护方式和保温层揭开时间探索等关键技术。具体的测温数据表明矿粉的活性高于粉煤灰;底板混凝土浇筑过程中,要正确处理泌水问题;保温养护需控制混凝土内部最高温度,中心与表面温差、表面与环境温差,降温速率等指标。Through study on construction technology of foundation slab in Tianjin Hehuang Subway Square,comprehensive construction technologies for mass concrete are summarized.They are mix proportion design of mass concrete,experimental study on self temperature,influence of different mixtures on concrete temperature,construction organization designs for concrete pouring under narrow site,maintenance style and opening time for insulation layer.The temperature data show that activity of mineral powder is higher than fly ash,solving bleeding problem is important during concrete pouring,and inner highest temperature,temperature difference of core and appearance,temperature difference of appearance and environment,temperature decreasing ratio should be controlled during insulation maintenance.

关 键 词：超高层建筑 基础底板 大体积混凝土 配合比 保温养护 施工技术 

分 类 号：TU755[建筑科学—建筑技术科学]