南京德基广场基础底板大体积混凝土施工技术  

Crack Control & Seepage-proofing Technology for Mass Concrete Foundation Slab in Nanjing Deji Plaza

作　　者：曾广桃 曾志献 刘春安[1] 廖秋林[1] 

机构地区：[1]北京城建集团建筑工程总承包部,北京100088

出　　处：《施工技术（下半月）》2011年第1期16-18,共3页Construction Technology

基　　金：国家科技支撑计划子课题(2008BAJ06B02-2);国家自然科学基金资助项目(40702052)

摘　　要：结合南京德基广场二期工程逆作法施工特点与大体积混凝土施工安排,分析了该工程大体积混凝土浇筑的特点、难点;并通过配合比优化试验,确定了掺聚羧酸减水剂、使用低碱低热水泥、聚丙稀纤维等混凝土自身所采取的防裂防渗措施。基于此,详细介绍了该工程大体积混凝土的施工方法,例如跳仓法施工、斜面分层浇筑、蓄水养护与温控措施等。此外,后浇带与施工缝的有效措施处理也确保了基础底板防裂防渗。Combined with the reverse construction method and mass concrete arrangement of the second stage of Nanjing Deji Plaza,the characteristic and difficulties for the mass concrete are analyzed.By the mix ratio optimization,some effective measures are carried out to control crack such as polycarboxylate water reducing agent,low alkali low-heat cement.polypropylene technology.According to the above,construction method of the mass concrete is summarized such as divided zones,pouring in slope layers,water conservation and temburature control.Besides,the well-done of expansion reinforcing band also ensures the crack control seepage-proofing of raft plate.

关 键 词：逆作法 配合比优化 防裂防渗 大体积混凝土 

分 类 号：TU473.2[建筑科学—结构工程]