Abstract: After operation of the high pressure water conveyance system of Tianhuangping pumped storage power station, seepage caused the rising of groundwater level in the mountain. By several treatments, effect of seepage prevention was achieved. Now, the seepage amount is generally stable, and the rising of mountain groundwater level does not exert great influence on overall stability of the water conveyance system. As well, the narrow-opening operation of high-pressure steel pipe drain system does not affect the safe operation of the whole project.

Key words: high pressure water conveyance system, seepage pressure, seepage, stability

摘要： 天荒坪抽水蓄能电站高压输水系统运行后，内水外渗引起山体地下水位升高。输水系统渗水经过多次工程处理，分析表明，防渗取得一定效果，目前渗水量总体平稳；山体地下水位升高对输水系统的结构稳定影响总体不大；高压钢管外排水小开度运行方式不影响工程的安全运行。

关键词: 高压输水系统, 渗压, 渗水, 稳定