预制箱梁裂纹发育机理及抑制技术  

On the Developing Mechanism of and Techniques for Preventing the Cracking of Pre-Cast Box Girders

作　　者：杨晓东[1] 

机构地区：[1]中铁十八局集团第一工程有限公司,河北涿州072750

出　　处：《国防交通工程与技术》2013年第6期69-72,共4页Traffic Engineering and Technology for National Defence

摘　　要：详细分析了混凝土箱梁常见裂纹形式、产生的原因以及裂纹的特征,并从原材料选择、混凝土配合比的设计及施工工艺等方面提出了抑制裂纹产生的措施,收到了良好的效果。能为类似工程提供借鉴。The various types of common cracks in concrete box girders,the causes and the characteristics of them are analyzed in detail in the paper,with some crack-preventing measures put forward from the angles of the right choice of the raw materials, the design of the mix ratio of the concrete, the construction processes, etc. ,all of which help achieve very good results. The pa per may serve as a useful reference for other projects of similar types.

关 键 词：箱梁 干缩裂纹 温度裂纹 塑性收缩裂纹 化学反应裂纹 应力裂纹 发育机理 抑制 

分 类 号：U448.213[建筑科学—桥梁与隧道工程]