光滑裂隙高流速非达西渗流运动规律的试验研究  

EXPERIMENTAL STUDY OF NON-DARCY WATER FLOW THROUGH A SINGLE SMOOTH FRACTURE

作　　者：王媛[1,2] 顾智刚[1,2] 倪小东[1,2] 李冬田[1,2] 宗国庆[1,2] 

机构地区：[1]河海大学岩土力学与堤坝工程教育部重点试验室,江苏南京210098 [2]河海大学土木与交通学院隧道与城市轨道工程研究所,江苏南京210098

出　　处：《岩石力学与工程学报》2010年第7期1404-1408,共5页Chinese Journal of Rock Mechanics and Engineering

基　　金：科技部"十一五"科技支撑计划项目(2006BAB04A06);新世纪优秀人才支持计划(NCET-07-0253);国家自然科学基金资助项目(50579090)

摘　　要：采用光滑平行板模拟岩体裂隙,研制可变裂隙开度、高水力梯度、自循环水流的单裂隙室内渗流模型试验装置。试验研究宽裂隙高水力梯度下的非达西渗流运动规律,建立流速与水力梯度的非线性关系曲线。将试验结果与Lomize紊流公式、速宝玉紊流半经验公式进行对比分析,发现三者在低水力梯度情况下结果较为一致,对于高水力梯度情况会出现较大的差异。最后探讨单裂隙高流速非达西渗流运动特点及判别准则等问题,建立非达西渗流流速与裂隙开度的关系曲线,以便于工程应用。An experimental apparatus is designed for studying the behavior of high velocity non-Darcy water flow through a single fracture.The fracture is constructed by two smooth parallel plates with variable apertures ranging from 0.5 mm to 6 mm.Circle water flow system and high hydraulic gradient are applied.The experiment is carried out and the behavior of non-Darcy water flow with high velocity is studied.A nonlinear relation between velocity of water flow and hydraulic gradient is fitted.Experimental results are compared with Lomize′s formula and Su′s formula;and it is found that they are similar when hydraulic gradient is low,but there are big differences when hydraulic gradient is high.Finally,the theoretical analysis of non-Darcy water flow through a single fracture and the related criterion are discussed.The relation between velocity and fracture aperture of non-Darcy water flow is also developed in order to apply conveniently in the engineering.

关 键 词：流体力学 岩体裂隙 模型试验 大开度 高水力梯度 高速非达西流 

分 类 号：O35[理学—流体力学]