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本文是作者们在加格达奇甘河堤坊泄水闸基础工程施工中，运用二级围堰取得良好效果的实践经验，并做了理计算与论证。
This article is the author’s practical experience of using secondary cofferdam to achieve good results in the construction of sluice gates of Qihe River in the Jiageda River and makes calculations and demonstrations.