纪村水电站库水和坝基水对大坝的影响研究

了解大坝库水和坝基水的水化学特征,以及形成原因并对其侵蚀性作出评价,对维护坝基稳定、保证水电站安全运行具有十分重要的意义。在系统采集纪村水电站库水和坝基水的基础上,运用Piper三线图对库水和坝基水的水化学特征及形成原因进行了分析;并根据国家标准,通过若干指标的分析对其侵蚀性作出了评价。研究结果表明:库水和坝基水对大坝产生的侵蚀作用与纪村水电站所处运行期和停运期有着密切的关联;如停运期内,库水具有强酸性侵蚀和弱结晶性侵蚀等。鉴于库水和坝基水的侵蚀影响,提出了若干条合理化建议,如在停运期适当提高库水位,以防止黄铁矿氧化,从而减少库水的侵蚀性等。

Research about the influence of reservoir water and dam foundation water of Jicun hydropower station on dam

To understand the hydrochemical characteristics and its formation reasons of the reservoir and dam formation water and to make the evaluation of its corrosive are very important to maintain the stability of dam foundation and ensure the security of the hydropower station. On the basis of collecting reservoir and dam foundation water of Jicun hydropower station systemly,method like Piper three diagram has been used to analysis the hydrochemical characteristics and its formation reasons of the reservoir and dam formation water and to make the evaluation of its corrosive through the analysis of several indicators according to the national standatd. Research results show that: the corrosive effects which the reservoir and dam foundation water make to the dam is closely associated with that Jicun hydropower station is in the operation period or the service period,such as in the service period,the reservoir water has strongly acidic erosion and the erosion of weak crystalline,etc. In the ight of the erosion of the reservoir and dam foundation water,several rationalization proposals have been put forward,such as in order to prevent the oxidation of pyrite,the water level when the station is in the service period should be improved which can reduce the corrosive of reservoir water,etc.