As a prominent engineering problem in the dam bank of Yellow River, the loss of root stones directly affects the foundation stability and overall safety of dam foundation. In this paper, a numerical model of root stone scouring and collapse is built via Flow-3D and verified by physical model test example. Numerical calculation results are in agreement with physical model test results, indicating that the numerical model is available. Furthermore, the process of bed scouring is simulated using the numerical model, and results reveal that scouring pit at the front head of the dam appears the earliest and the pit is the deepest. With the continuous flow of water, the scouring pit develops towards the upstream cross corner area and the downstream cross corner area where the pit depths are similar. Sediment deposits at the dam crotch due to the action of flow vortexes. The front head of dam and upstream corner are the most prone to hazards, and therefore, should be reinforced against scouring in practical engineering.
Key words
root stone lost /
dam buttress /
Flow-3D /
scouring and collapsing /
Yellow River buttress
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
References
[1] 张宝森, 郭全明. 黄河河道整治工程险情分析[J] . 地质灾害与环境保护, 2002, 13(3):1-5.
[2] 张晓雷,史 静,杨 磊,等. 混凝土四面体透水框架群防根石走失技术应用[J] . 人民黄河,2013,35(3):8-9,15.
[3] 王 飞,张 彬,齐剑峰.桥墩局部冲刷发展过程的三维动网格模拟[J] .南水北调与水利科技,2017,15(2):132-137.
[4] 黄河水利委员会下游整治工程调查组. 黄河下游护岸工程根石走失问题的调查报告[J] .泥沙研究,1959,4(1):65-70.
[5] 田德本. 黄河下游丁坝根石走失的原因及防护措施[J] . 人民黄河,1997,(6):9-11.
[6] 崔占峰,张小峰. 三维紊流模型在丁坝水流中的应用研究[J] . 长江科学院院报,2008,25(2):21-25.
[7] 张红武, 汪家寅, 丁晓明,等. 黄河险工根石走失防护途径的试验研究[J] . 治黄科技情报,1989,(4):60-65.
[8] 张志军.黄河宁夏段坝垛冲刷坑和根石走失的试验研究[D] . 西安:西安理工大学,2003:19-47.
[9] 缑元有. 河道整治工程根石走失的力学分析研究[J] .人民黄河,2000,22(4):4-5.
[10] 孙桂环, 彭 飞, 高 坤. 黄河下游河道整治工程根石冲刷坑深度计算浅析[J] . 水利建设与管理, 2008, 28(6):66.
[11] 光治河, 徐荣安, 刘英杰,等. 黄河河道整治工程坝岸根石走失原因和防护措施[J] . 科技信息,2010,(15):366-367.
[12] 郑付生,陈太平,郭 文.河道坝岸根石走失原因及加固措施[J] .黄河水利职业技术学院学报,2002,14(1):14-15.
[13] 包家全,董 强,王 辉.黄河河道整治工程根石走失原因及防护措施[J] .人民黄河,2003,25(11):17-18.
[14] 苗长运,郭西方,齐洪海.黄河河道整治工程根石走失及加固研究[J] .人民黄河,2004,26(2):25-26.
[15] HIRT C W, SICILIAN J M. A Porosity Technique for the Definition of Obstacles in Rectangular Cell Meshes[C] ∥Proceedings of the 4th International Conference on Ship Hydrodynamics, Washington D.C., September 24-27, 1985.
[16] 张细兵,欧治华,崔占峰,等.基于非结构网格的分蓄洪区水沙演进数学模型研究[J] .长江科学院院报,2011,28(4):75-79.
[17] FRACCAROLLO L, CAPART H. Riemann Wave Description of Erosional Dam-break Flows[J] . Journal of Fluid Mechanics, 2002, (461):183-228.
PDF(5687 KB)
