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     董同剛  張利俊  游寶坤  邵中軍
    （中國建筑材料科學(xué)研究院 北京 100024）

[提要]  砼收縮開裂問題是一直未能很好解決的難題，并作為一個(gè)普遍性的薄弱環(huán)節(jié)困擾著建筑界。作者通過對(duì)深圳體育場(chǎng)看臺(tái)超長結(jié)構(gòu)的裂滲分析，提出了利用UEA膨脹砼對(duì)體育場(chǎng)看臺(tái)進(jìn)行裂滲控制，取消后澆帶的有效理論依據(jù)，并成功地指導(dǎo)了該工程的施工。
[關(guān)鍵詞]  體育場(chǎng)看臺(tái)  膨脹砼 裂縫 裂滲控制

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