泵送顶升钢管拱自密实混凝土的施工技术  

Construction Techniques of Self-compacting Concrete Filled Steel Tube Arch

作　　者：蒋正武[1] 潘微旺 李享涛[1] 张长贵 

机构地区：[1]同济大学先进土木工程材料教育部重点实验室,上海200092 [2]湖州鹿山坞矿山有限公司,浙江湖州313025

出　　处：《中国包装科技博览（混凝土技术）》2010年第11期75-79,共5页China Science and Technology Review

基　　金：国家自然科学基金资助项目（51078269）;浙江省重大科技专项（2008C13084）

摘　　要：本文根据工程施工的钢管拱桥桥型特点、连续泵送顶升施工工艺、现场施工条件和环境气候条件，提出了包括钢管拱自密实混凝土的性能指标要求、泵送顶升施工流程、施工准备、泵送顺序、辅助设计、施工中应急处理措施与施工技术要点等方面的施工方案，现场配制出长时间保持工作性的高强补偿收缩自密实混凝土。根据该施工方案，经良好的现场施工组织与控制，灌注过程监控，全桥各钢管拱混凝土的泵送顶升施工均取得成功。According to the bridge type characteristics, continuous pumping lift-up construction technology, on-site construction conditions and environmental climatic conditions in the project, construction program, which includes performance requirements of SCC filled steel tube, construction process of pumping lift-up, construction preparation, pumping sequence, aided design emergency treatment measures during construction, major technical construction issues, etc, were proposed in the paper; SCC with the properties of high-strength, shrink- age-compensating and excellent workability within long hours were prepared on-site. By the good construction organization, control and per- fusion process monitoring on-site, pumping lift-up construction of SCC filled steel tube arch of full bridge achieved success based on the construction program.

关 键 词：钢管拱 自密实混凝土 施工工艺 泵送顶升 

分 类 号：TU755.6[建筑科学—建筑技术科学]