董同刚  张利俊  游宝坤  邵中军
    （中国建筑材料科学研究院 北京 100024）

[提要]  砼收缩开裂问题是一直未能很好解决的难题，并作为一个普遍性的薄弱环节困扰着建筑界。作者通过对深圳体育场看台超长结构的裂渗分析，提出了利用UEA膨胀砼对体育场看台进行裂渗控制，取消后浇带的有效理论依据，并成功地指导了该工程的施工。
[关键词]  体育场看台  膨胀砼 裂缝 裂渗控制

Cracks in concrete due to shrinkage has been a difficult problem for one hundred years and puzzled the building circle as a popular weak link in the building chain. Through crack-leakage analysis of superlong concrete structure of Shenzhen Stadium, the paper proposes a crack-leak control method of bleacher slabs for the stadium by using UEA expansive concrete, gives sufficient theoretical essence for eliminating back-filled joints and supervised the operation in the project successfully.
Keywords: stadium bleachers; expansive concrete; cracks; crack-leak control