Abstract: This paper briefly introduces the operation of overflow surface of flood discharge hole and its detection. By routine and special inspection of concrete cracks on overflow surface, the causes of cracks are analyzed. Combined with detection conclusion and previous treatment, corresponding suggestions are put forward for later operation inspection.

Key words: overflow surface, crack, detection, analysis

摘要： 简要介绍洞坪水电站大坝表孔溢流面运行和检测情况。通过对溢流面混凝土裂缝的日常巡检和专项检测，初步分析了裂缝形成原因，结合检测分析结论和前期处理的现状，对溢流面后期巡视检查提出了意见和建议。

关键词: 溢流面, 裂缝, 检测, 分析