天荒坪工程库岸排水孔与孔压消散

Drainage Holes and Pore Water Pressure Dissipating on Reservoir Bank of Tianhuangping Project

由于抽水蓄能电站的库水位频繁涨落 ,日变幅大 ,对岸坡的稳定有更高的要求 .采取有效的排水措施 ,解决孔隙压力消散问题对岸坡的稳定尤为重要 .本文着重研究岸坡排水孔的排水效果 ,建立了相应的模型 ,计算孔隙压力消散情况 ,通过理论分析与工程实践结合 ,解决了工程实际问题 .实践证明 ,电站运行效果良好 。

Tianhuangping pumped storage power station is the biggest one in China and also is one of major projects in the 8th 5 Year Plan of China.The stability of bank slope is higher required,because of the water level changing frequently and it’s changing range in a day being large,which is the characteristic of pumped storage power station.It is specially important to stability of bank slope that using effective drainage measures to dissipate the pore water pressure.Working effect of the drainage holes on bank is studied in this paper,and the mathematical model is established to calculate dissipating cases of the pore water pressure.Thus,the problem consisted in practical engineering is solved by combining both theoretical analysis and engineering experience.The result shows that the power station operates well and the engineering’s benefit is obvious.