本文介绍了1984年我省彰湖水库采用“顶管”法更新坝下输水管的主要施工经验。工程经20多个月的运行,未发现施工质量方面的问题。鉴于我省大部分中、小型水库工程的坝下涵管也存在不少修理和更新问题,为此提供参考。 This paper introduces the main construction experience of using the “pipe jacking” method to renew the water pipe under the dam in Changhu Reservoir in our province in 1984. After more than 20 months of operation, the construction quality problems were not found. In view of the majority of our province, small reservoir dam under the pipe there are a lot of repair and update problems, to provide reference.