基于离散标准节理粗糙度系数曲线的粗糙单裂隙等效水力隙宽的确定
发布时间：2019-04-27 08:03
【摘要】：鉴于节理粗糙度、力学隙宽及迹线是影响确定粗糙单裂隙等效水力隙宽的三个关键因素,在既有研究的基础上,将光滑平行板和Barton提出的10条标准节理粗糙度系数曲线数字化,应用Fluent软件对不同节理粗糙度系数和不同力学隙宽模型进行数值模拟,探讨了节理粗糙度系数、力学隙宽、迹线与等效水力隙宽之间的关系。并与立方定理修正公式进行对比,结果表明等效水力隙宽随力学隙宽增大而线性增大,随节理粗糙度系数的增大而减小,并且考虑实际迹线情况的等效水力隙宽较不考虑的大。因此,在实际工程中,可采用所提出的拟合公式判断自然粗糙裂隙的渗透能力。
[Abstract]:In view of the joint roughness, mechanical gap width and trace line are the three key factors affecting the determination of equivalent hydraulic gap width of a rough single crack. On the basis of existing research, the 10 standard joint roughness coefficient curves proposed by smooth parallel plate and Barton are digitized. The relationship between joint roughness coefficient, mechanical gap width, trace line and equivalent hydraulic gap width is discussed by numerical simulation of different joint roughness coefficients and different mechanical gap width models with Fluent software. The results show that the equivalent hydraulic gap width increases linearly with the increase of the mechanical gap width and decreases with the increase of the joint roughness coefficient, and the equivalent hydraulic gap width considering the actual trace is larger than that without consideration of the actual trace. The results show that the equivalent hydraulic gap width increases linearly with the increase of the mechanical gap width and decreases with the increase of the joint roughness coefficient. Therefore, in practical engineering, the proposed fitting formula can be used to judge the permeability of natural rough cracks.
【作者单位】： 河海大学岩土力学与堤坝工程教育部国家重点实验室;河海大学土木与交通学院隧道与城市轨道工程研究所;
【分类号】：TV139.1;TU45
本文编号：2466819
[Abstract]:In view of the joint roughness, mechanical gap width and trace line are the three key factors affecting the determination of equivalent hydraulic gap width of a rough single crack. On the basis of existing research, the 10 standard joint roughness coefficient curves proposed by smooth parallel plate and Barton are digitized. The relationship between joint roughness coefficient, mechanical gap width, trace line and equivalent hydraulic gap width is discussed by numerical simulation of different joint roughness coefficients and different mechanical gap width models with Fluent software. The results show that the equivalent hydraulic gap width increases linearly with the increase of the mechanical gap width and decreases with the increase of the joint roughness coefficient, and the equivalent hydraulic gap width considering the actual trace is larger than that without consideration of the actual trace. The results show that the equivalent hydraulic gap width increases linearly with the increase of the mechanical gap width and decreases with the increase of the joint roughness coefficient. Therefore, in practical engineering, the proposed fitting formula can be used to judge the permeability of natural rough cracks.
【作者单位】： 河海大学岩土力学与堤坝工程教育部国家重点实验室;河海大学土木与交通学院隧道与城市轨道工程研究所;
【分类号】：TV139.1;TU45
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