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| Numerical Simulation on Parameters Optimization of the Oblique Inserting Plate Retaining Sand Wall Design |
| Shi Long1,2, Jiang Fuqiang2 |
1. School of Civil Engineering, Lanzhou Jiaotong University, lanzhou 730070, China;
2. Northwest Research Institute Co., Ltd of C.R.E.C., Lanzhou 730000, China |
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Abstract Based on the two-fluid unsteady model of FLENT Eulerian, the motion characteristics of wind-sand two-phase flow around the oblique inserting plate retaining sand model wall with different parameters are simulated. The results show that the smaller the ventilation rate is, the greater the sand collection quantity is, but the closer the deposited sand is to the retaining sand model wall, the easier it will be buried, it is suitable to take the ventilation rate as 25%-40%. If the angle of inserting plate is less than 90, the deposition sand area of the leeward side is close to the retaining sand model wall. If the angle is larger than 90, there will be a certain distance between the deposition sand area and the retaining sand model wall. If the angle is 90-135, most of the deposition sand will be blocked around the retaining sand wall, which has the best effect of sand preventing, combined with the engineering costs, the angle should be taken in 110-135.Within the effective influential range of the leeward side, contour lines of the speed of wind are respectively distributed as the shape of "V" or inverse "S" in the horizontal direction and the vertical direction; when the speed of wind is given, effective shadow area scope of the leeward side increases gradually with the increase of the height of sand barrier. While the height of retaining sand wall is given, the deposition sand area of the leeward side moves down the wind with the increase of wind speed. The higher the retaining sand wall, the higher the wind pressure and project costs are, based on comprehensive consideration of the project cost and sand prevention effect, the height of the sand barrier is recommends as 1.5-2.0 m.
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Received: 11 August 2013
Published: 20 May 2014
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[1] 倪晋仁,李振山.风沙两相流理论及其应用[M].北京:科学出版社,2006.
[2] Ehrenberg C G.The Sirocco dust that fell at Genoa on the 16th May 1846[J].Quarterly Journal of Geological Society London,1947,3:25-26.
[3] Sokolov N A.Dunes:Development,Formation and Inner Structures[M].St Petersburg,Russia,1884:286.
[4] Bagnold R A.The movement of desert sand[J].Geographical Journal,1935,85:342-369.
[5] Bagnold R A.The movement of desret sand[C].Proceedings of the Royal Society of London A,1936:157.
[6] Bagnold R A.The transport of sand by wind[J].Geographical Journal,1937,89:409-438.
[7] Bagnold R A.The measurement of sand storms[C].Proceedings of the Royal Society of London A,1938,169:282-291.
[8] Bagnold R A.The Physics of Blown Sand and Desert Dunes[M].London,UK:Methuen,1941.
[9] Chepil W S,Woodruff N P.The physics of wind erosion and its control[J].Advances in Agronomy,1963,15:211-302.
[10] 河村龙马.飞砂的研究[R].日本,东京:东京大学理工学院,1951:3-4.
[11] Zingg A W.Wind-tunnel studies of the movement of sedimentary material[C].Proceedings of the Fifth Hydraulics Conference,1953:34,111-135.
[12] 兹纳门斯基.沙地风蚀过程的实验研究和沙堆防止问题[M].杨郁花,译;朱震达,校.北京:科学出版社,1960.
[13] Owen P R.Saltation of uniform grains in air[J].Journal Fluid Mechanics,1964,20:225-242.
[14] 陈广庭.沙害防治技术[M].北京:化学工业出版社,2004.
[15] 马晓洁,张春来,张加琼,等.包兰铁路沙坡头段防护体系前沿栅栏沙丘形态与近地面流场[J].中国沙漠,2013,33(3):649-654.
[16] 魏天琦,伍永秋,潘美慧,等.榆靖高速公路防护体系近地面流场特征[J].中国沙漠,2013,33(3):655-661.
[17] 唐玉龙.青藏铁路西格段戈壁风沙流防治体系研究[J].中国沙漠,2013,33(1):72-76.
[18] 曾秋兰,李振山,卢傅安,等.高速公路透风型挡风墙不同位置防风特性的数值模拟研究[J].中国沙漠,2012,32(6):1542-1550.
[19] 汪言在,魏殿生,伍永秋,等.塔克拉玛干沙漠沙垄区公路防护带内风场特征研究[J].中国沙漠,2012,32(5):1216-1223.
[20] 罗万银,董治宝,钱广强,等.栅栏防护体系空气动力学效应研究进展[J].中国沙漠,2012,32(4):885-895.
[21] 蒋富强,李荧,李凯崇,等.兰新铁路百里风区风沙流结构特性研究[J].铁道学报,2010,32(3):105-110.
[22] 李驰,黄浩,孙兵兵.风沙环境下沙漠路基风蚀破坏数值模拟研究[J].岩土力学,2010,31(Z2):378-382.
[23] 朱红钧,林元华,谢龙汗.流体分析及仿真实用教程[M].北京:人民邮电出版社,2010. |
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2014, Vol. 34 
