Abstract: The frequent occurrence of second stage concrete defects at the gate slot of a hydropower station poses a serious threat to the safe operation of the project. Based on the second stage concrete defects at gate slot of Tankeng hydropower station, this study analyzes the causes of the defects at gate slot and its impact on the safe production of the hydropower station. As well, it puts forward the counter measures to prevent the second stage concrete defects at gate slot alone with the preliminary ideas of defect treatment.

Key words: hydropower station, gate slot, second stage concrete, defect

摘要： 水电站门槽二期混凝土缺陷频发，给水电站安全运行带来严重威胁。通过滩坑水电站门槽二期混凝土缺陷情况，分析门槽二期混凝土缺陷产生的原因及其对水电站安全生产的影响，提出防止门槽二期混凝土产生缺陷的相应措施，以及缺陷处理的初步设想。

关键词: 水电站, 门槽, 二期混凝土, 缺陷