蔡　紅　溫彥鋒　邊京紅

【摘　要】　通過室內(nèi)對(duì)粉煤灰透水性和各向異性的研究，了解試驗(yàn)方法對(duì)滲透系數(shù)及各向異性的影響程度，以更好地判定灰壩滲流計(jì)算成果的可靠性。研究表明，灰的滲透各向異性主要取決于與試樣制備方法有關(guān)的結(jié)構(gòu)性。對(duì)于具有同樣結(jié)構(gòu)的粉煤灰，滲透系數(shù)愈小，分層愈多，則滲透各向異性愈大。
【關(guān)鍵詞】　粉煤灰　滲透　各向異性　結(jié)構(gòu)性

Permeability and Its Anisotropy of Fly Ash
Cai Hong　　Wen Yanfeng　　Bian Jinghong
(China Institute of Water Resources and Hydropower,Beijing,100044)

　　Abstract: Laboratory permeability tests on fly ash are thorough ly conducted to investigate the effect of testing apparatus,test procedure and m ethod of specimen preparation on the measured coefficient of permeability and it s anisotropy.Test result show that the coefficient of permeability of fly ash is not very sensitive to the testing apparatus,test procedure and even specimen de nsity.However,its anisotropy depends in a large extent on the method of specimen preparation or the structure of the specimen.The lower the coefficient of perme ability,the more the number of layer consisting of the specimen,then the higher the permeability anisotropy.
　　Key words: fly ash,permeability,anisotropy,structure