针对低碱度软水条件下水泥灌浆帷幕的耐久性，采用加速腐蚀的室内试验方法，以溶出性 Ca2＋量为评价指标，研究了渗透压力、HCO -3浓度、浆液配合比和水温等因素对帷幕耐久性的影响程度和规律。在高水头和低碱度软水作用下，100年后大岗山水电站坝基帷幕结石体性能将会出现一定下降，但幅度不大，不会对帷幕防渗体系产生严重的影响。试验所采用的研究方法和成果可为类似工程提供参考。%The durability of the cement grouting curtain under low alkalinity soft-water were studied to analyze the influ-ence degree and law of the osmotic pressure ,HCO -3 concentration ,water-cement ratio of slurry ,water temperature and other factors on the curtain durability by using the mothod of accelerated erosion and considering the amount of the dis -solved Ca2 + as the evaluation index .With the high water-press and low alkalinity soft-water ,the performance of grouting curtain of Dagangshan Hydropower Station will be declined to a certain extent after 100 years ,but it will not have a seri-ous impact on the anti-seepage system .The test method and achievement can provide some references for similar projects .
展开▼
