【作者】 宋羿； 胡奥锋； 王沐； 钱家忠； 李福林； 黄继文；

【Author】 SONG Yi;HU Ao-feng;WANG Mu;QIAN Jia-zhong;LI Fulin;HUANG Ji-wen;School of Resources and Environmental Engineering,Hefei University of Technology;WaterResources Research Institute of Shandong Province;

【机构】 合肥工业大学资源与环境工程学院； 山东省水利科学研究院；

【摘要】 基岩裂隙介质具有强烈的非均质性和多尺度性,其中的水流量化是一个挑战性问题。交叉裂隙是联系单个裂隙和网络裂隙的桥梁,为了研究交叉裂隙中水流运动规律,本文设计了可变粗糙度和进水角度的两进两出的交叉裂隙试验模型,开展了不同粗糙度、不同进出水角度条件下交叉裂隙水力试验研究,分析局部裂隙中水流运动规律,研究结果表明:在本试验条件下,局部裂隙水流流速V与水力梯度J呈非线性关系,Forchheimer公式能较好地拟合水力梯度和流速间的关系。单宽流量与水力梯度间呈幂指数关系q=KJ~m,且m的值随着相对粗糙度的增大而变大。局部立方定律并不适用,应用修正的立方定律能够较好地拟合实测数据,隙宽指数n值均大于3属于超立方定律范围,且n值随着粗糙度增大而变小。更多还原

【Abstract】 The fractured media of bedrock are strongly heterogeneous and multi-scale,and the quantification of water flow is a challenging problem.Cross fracture is a bridge connecting single fracture and network crack.In order to study the law of flow movement in cross fissures,this paper designed a cross fissure test model with two inlet and two out of variable roughness and inlet angle,and carried out the hydraulic test of cross fissure with different roughness and different angle of water intake,and analyzed the law of flow movement in the local fissure.The results showed that:Under the experimental conditions,the flow velocity V of the local fissure is nonlinear with the hydraulic gradient J,and the Forchheimer formula can better fit the relationship between the hydraulic gradient and the flow velocity.There is a power exponent q=KJ~m between the single width flow and hydraulic gradient,and the value of M increases with the increase of relative roughness.The local cubic law is not suitable.The modified cubic law can fit the measured data well.The n value of the gap width index is more than 3 of the hypercube law,and the n value becomes smaller with the increase of the roughness.更多还原