2003, Volume 5, Issue 7
Strategic Study of CAE >> 2003, Volume 5, Issue 7
Simulation Study on the Contact Scouring Development Between Underground Layers
College of Civil Engineering, Hohai University, Nanjing 210098, China
Next Previous
Abstract
A new model has been developed for studying the mechanism of infiltration destruction by contact scouring between the hardpan and grid. The permeability of coarseness gap that formed by different lithology is substituted by the permeability of slippery cranny, and the permeability of the stratum can be expressed by a combination of the permeability of gap and sand and gravel. The starting speed of the fine sand can be used as differentiation criterion. To calculate the fine sand moving by stabilization flow theorem in different time part, the fine sand near the orifice flows out of the stratum at the beginning. At first the permeability coefficient near the orifice becomes larger, and then it developes inside. It will develope rapidly in the direction perpendicular to tho bank, and even forms a concentrate leakage passage.
Keywords
contact scouring ; starting speed ; flow net ; concentrate leakage passage
Figures
图1
图2
图3
图4
图5
图6
图7
图8
图9
图10
References
[ 1 ] 毛昶熙主编.渗流计算分析与控制［M］.北京：中国水利水电出版社，1990
[ 2 ] 陈建生，李兴文，赵维炳.堤防管涌产生集中渗漏通道机理与探测方法研究［J］．水利学报，2000，(9):48~54
[ 3 ] 薛禹群，朱学愚.地下水动力学［M］.北京：地质出版社，1982
京公网安备 11010502051620号
