粗糙单裂隙高速非达西渗流特性的试验研究  

Laboratory study on the features of the high-speed non-darcy seepage flow in single rough fracture

作　　者：张烨 尹学谦 陈珂 ZHANG Ye;YIN Xueqian;CHEN Ke(Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering,Hohai University,Jiangsu Nanjing 210098 China;Geotechnical Research Institute,Hohai University,Jiangsu Nanjing 210098 China)

机构地区：[1]河海大学岩土力学与堤坝工程教育部重点实验室,南京210098 [2]河海大学岩土工程研究所,南京210098

出　　处：《河北工程大学学报（自然科学版）》2018年第1期14-18,23,共6页Journal of Hebei University of Engineering:Natural Science Edition

基　　金：中央高校基本科研业务费(2016B08114)

摘　　要：针对裂隙岩体渗流破坏灾害问题。研制符合不同节理粗糙度的拟岩体粗糙单裂隙试件,开展了可变裂隙开度、高水力梯度粗糙单裂隙非达西渗流室内物理试验。研究表明,高渗流速度情况下,渗流水力梯度与渗流流速之间呈现非线性关系;Forchheimer方程能良好拟合高流速条件下粗糙裂隙渗流情况;提出非达西影响系数的半经验关系式,为工程实践中突涌水量预测提供重要参考。With the expansion of the scale of underground engineering construction,it becomes an important issue about seepage failure hazard of fractured rock mass in engineering and theoretical circles.D eveloped with sim ulated rock rough single fracture specim ens of different rock jo in t roughness,laboratory tests of non-Darcy seepage in rough single fracture with variable apertures and high hydraulic gradient are carried out.It is indicated that flow behavior in the rough fractures becomes nonlinear with the high seepage velocity,and the hydraulic gradient and volum etric flow rate data points are fitted very well by the Forchheimer equation.A semi empirical formula of the non-Darcy effect coefficient is presented,which provides an im portant reference for the prediction of w ater bursting in engineering practice.

关 键 词：粗糙裂隙渗流 高速非达西渗流 Forcliheimer方程 非达西影响系数 

分 类 号：TV139.1[水利工程—水力学及河流动力学]