模拟环境水对隧洞石膏岩溶蚀的分析评价与灰色预测

ASSESSMENT AND GREY PREDICTION OF THE GYPSUM DISSOLUTION IN TUNNEL AFFECTED BY SIMULATED WATER

由于金康水电站库区的长期运行,环境水对库区内基岩以及石膏岩的溶蚀,已经对大坝的安全性产生重要影响。本文采用室内实验模拟的方法,对库区的石膏岩样品用城市自来水模拟库区环境水对其进行溶蚀实验,以其中的Ca^(2+)和SO_4^(2-)等参数为指标,根据溶蚀前后环境水的水质变化情况,并结合灰色预测的方法,分析其对水电站安全性的影响。结果表明,该库区石膏岩在当前的天然状态下遭受到环境水和地下水的强烈溶蚀。

For the JinKang hydropower station long-term operation,that the environmental water corrode the gypsum rock had been an important impact to the dam security. That used the indoor simulation experiment to corrode the gypsum rock samples with water instead of the environmental water,which take parameters and so on Ca2＋ and SO4 ^2-for the indicators, in accordance with environmental water before and after corrosion changes in water quality, using gray prediction method to analyzes it to the hydropower station secure influence. The results showed that the gypsum rock suffered a strong corrosion in the current state of the natural environment and ground water.