《人民珠江》2 0 0 0年第 2期刊载韦卓信“碾压混凝土改造土坝的探讨”一文 ,文中说 :用碾压混凝土把土坝改造成过水土坝是近 10年兴起的一种新技术 ,发展最快的是美国。目前美国已有 45座土坝用这种技术改造成为允许坝顶漫流泄洪的过水土坝 ,坝顶过流最大水深达 3 7ｍ ,最大单 “Pearl River in People’s Republic of China” No. 2,001 Volume 2 published a paper entitled “Discussion on Roller Compacted Concrete Rehabilitation of Earth Dam” by Wenzhuo Zhu. It says that the transformation of earth dam into over-dam by RCC is a kind of new Technology, the fastest growing is the United States. At present, 45 earth dams in the United States have been transformed by this technology into overflow dams that allow flood discharge at the crest. The maximum water depth at the crest of the dam reaches 37 m and the largest single