单裂隙辐射流渗流试验研究
发布时间：2018-07-18 15:28
【摘要】：通过裂隙辐射流渗流试验装置对人工裂隙进行不同法向荷载下渗流试验,分析法向应力和渗流压力对渗流量的影响机理。各级法向荷载下裂隙面冲刷痕迹大体接近,被冲刷的区域集中在试件中心进水口处,进水口附近水流产生较大紊动。不同法向应力下渗流量与入渗水头近似呈线性关系,说明了试验过程中裂隙水的运动特性符合达西定律;相同入渗水压下的渗流量大致相同,上下试件之间的接触状态不随法向应力的加大发生变化,而是维持一个稳定的裂隙开度。入渗水压从0.1 MPa到0.2 MPa之间水头损失增加较快,0.2 MPa后增速变慢且趋近直线;水头损失百分比曲线呈现先增大后减小的规律,拟合曲线为三次多项式。
[Abstract]:The percolation test of artificial cracks under different normal loads is carried out by the fissured radiant flow seepage test device. The influence mechanism of the normal stress and seepage pressure on the seepage flow is analyzed. The scouring traces of the gap surface at all levels are roughly close, the area of the scour is concentrated at the inlet of the center of the specimen, and the flow of water near the inlet produces a greater turbulence. There is a linear relationship between the seepage flow under different normal stress and the infiltration head, which shows that the motion characteristics of the fractured water conform to Darcy's law in the test process, and the seepage flow under the same infiltration water pressure is approximately the same. The contact state between the upper and lower specimens does not change with the increase of the normal stress, but maintains a stable fracture opening. The water head loss between the infiltration water pressure from 0.1 MPa to 0.2 MPa increases rapidly, and the growth rate becomes slow and straight after 0.2 MPa, and the percentage curve of the head loss increases first and then decreases, and the fitting curve is three times polynomial.
【作者单位】： 西安理工大学西北旱区生态水利工程国家重点实验室培育基地;
【基金】：陕西省重点科技创新团队项目(2013KCT-015)
【分类号】：TU452
本文编号：2132338
[Abstract]:The percolation test of artificial cracks under different normal loads is carried out by the fissured radiant flow seepage test device. The influence mechanism of the normal stress and seepage pressure on the seepage flow is analyzed. The scouring traces of the gap surface at all levels are roughly close, the area of the scour is concentrated at the inlet of the center of the specimen, and the flow of water near the inlet produces a greater turbulence. There is a linear relationship between the seepage flow under different normal stress and the infiltration head, which shows that the motion characteristics of the fractured water conform to Darcy's law in the test process, and the seepage flow under the same infiltration water pressure is approximately the same. The contact state between the upper and lower specimens does not change with the increase of the normal stress, but maintains a stable fracture opening. The water head loss between the infiltration water pressure from 0.1 MPa to 0.2 MPa increases rapidly, and the growth rate becomes slow and straight after 0.2 MPa, and the percentage curve of the head loss increases first and then decreases, and the fitting curve is three times polynomial.
【作者单位】： 西安理工大学西北旱区生态水利工程国家重点实验室培育基地;
【基金】：陕西省重点科技创新团队项目(2013KCT-015)
【分类号】：TU452
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