Abstract: Recently, the water discharge of the sixth steel pipe' s outside drain pipe of Tianhuangping pumped storage power station is on a high level , and the discharge is increasing .Further more , small detritus, sand, cement concretion and a little earth are carried out by the drainage. This phenomenon is abnormal. According to this problem, the author analyzed the causation along with the possible consequence and advanced disposal suggestion based on the design intent, the observation and test achievements.

摘要： 近期天荒坪电站6 号机引水钢管外排水管排水量偏大, 有增加趋势, 并且发现排水夹带出碎石粒、沙、水泥灌浆结石和少量泥状物。这种现象是不正常的。对此, 作者根据设计意图和观测、试验成果, 对其原因、可能产生的后果进行分析并提出处理建议。