大体积混凝土施工技术研究系统设计毕业设计.doc

大体积混凝土施工技术研究系统设计
学生姓名:
学号:
指导教师:
年级专业:土木工程

二O一二年十一月
Graduation Design(Thesis) of adult higher education of Chongqing University
Design of Large volume concrete construction technology research system designSystem
Undergraduate:
Student Number:
Supervisor:
Major: Civil Engineering
College of Continuing Education of Chonqing University
November 2011
摘要
随着世界发展领域的发展,大体积混凝土工程规模越来越大,基础结构形式日趋复杂,技术水平越来越复杂,高层建筑箱型基础或筏板基础都是具有较大的钢筋混凝土底板,还经常会出现较大的深梁等。因此,大体积混凝土在现代建筑中有着广泛的应用。混凝土定义为混凝土结构物实体最小几何尺寸不小于1m 的大体量混凝土,或预计会因混凝土中胶凝材料水化引起的温度变化和收缩而导致有害裂缝产生的混凝土。由于大体积混凝土截面面积大、水泥用量大、混凝土浇筑时间过长,内外温差大,温度易受缩而产生裂缝,施工难度较大。因此,本文首先是对温度产生的裂缝进行分析,然后对大体积混凝土二次振捣,接着分析了养护方法及效果分析,后浇带的留置与处理和混凝土的温度监测,研究了细石混凝土填补,最后对施工质量通病进行了分析。本文虽然文字简短,对初学者关于大体积混凝土都有个深远的了解,因此本文具有深刻的理论意义和广泛的实际应用。
关键词:大体积混凝土、裂缝、预防、控制
ABSTRACT
Along with the world development in the field of development, large volume concrete project scale is more and more big, infrastructure form plex with each passing day, technical level is more and plex, tall building box foundation and raft foundation are large reinforced concrete floor, they often have larger deep beam. Therefore, large volume concrete in modern construction has a wide range of applications. Concrete concrete structure entity is defined as the minimum size of not less than 1m of large volume of concrete, or expected for concrete cementitious material hydration caused by temperature variation and shrinkage cracks of concrete and lead. Because of the large volume concrete cross section area, large consumption of cement, concrete pouring time is too long, the temperature difference between inside and outside, easy temperature contraction crack, difficulties in construction. Therefore, this paper is to analyze the temperature cracks of large volume concrete, and then the two vibrator, then analyzed the maintenance method and effect analysis of after-pouring zone, with processing and concrete temperature monitoring, study the fine stone concrete filled, finally mon construct