单裂隙岩体非饱和临界状态渗流特性初步研究  

A Study on Critical Seepage Characteristics for Unsaturated Flow in a Single Rock Fracture

作　　者：韩冰[1] 叶自桐[1] 周创兵 

机构地区：[1]武汉水利电力大学水利工程系,湖北武汉430072

出　　处：《水科学进展》2000年第1期1-7,共7页Advances in Water Science

摘　　要：探讨了裂隙非饱和渗流机制 ,认为裂隙尺度上的非饱和渗流实际上是由许多局部开度尺度上的饱和渗流构成的。用重正化理论的方法 ,对裂隙发生逾渗相变时的临界特性进行了研究 ,指出裂隙非饱和渗流存在一临界饱和度值 ,当饱和度小于该值时 ,裂隙中无渗流存在。对裂隙非饱和水力传导度进行了讨论。The unsaturated seepage mechanism in a rock fracture is discussed. It shows that the macroscale(fracture scale) unsaturated seepage can be considered as many microscale(local aperture scale) saturated seepage. Then the critical seepage characteristics are studied by means of renormalization group(RG) theory while the percolation happens. The results show that the critical saturation does exist and there is not any seepage flow.if is less than the critical saturation. Finally, the unsaturated hydraulic conductivity is also discussed.

关 键 词：裂隙岩体 渗流 重正化 逾流 水力传导度 

分 类 号：P641.135[天文地球—地质矿产勘探]