HDPE功能性固沙障防风效应试验

doi:10.7522/j.issn.1000-694X.2013.00446

摘要/Abstract

摘要： 根据仿生学原理，按照普遍使用并取得显著防护效益的草方格上疏下密式孔隙结构，采用抗紫外线性能强、耐极端气温和抗老化性强的HDPE材料制作出相似孔隙结构的功能性固沙障。通过风洞模拟试验，对比分析HDPE均一型与功能性固沙障的防风效应。结果表明：（1）均一型和功能性固沙障的有效防护距离随着风速的增大呈现指数衰减。（2）在低风速（<14 m·s^-1）条件下，均一型固沙障的总有效防护距离比功能性固沙障大；而在高风速（>14 m·s^-1）条件下，均一型固沙障的总有效防护距离比功能性固沙障小。无论风速大小，功能性固沙障网间的有效防护距离都远大于均一型。（3）均一型和功能性防沙网均可用于替代传统的防沙材料，具有极大的应用价值和推广前景。功能性防沙网适宜作较矮的半隐蔽式格状沙障，而均一型防沙网更适宜作高立式阻沙沙障。

关键词: 功能性固沙障, 防风效应, 均一型固沙障

Abstract: Based on the bionics principle, according to the porosity structure (thin upper and close lower) of straw checkerboard sand-fixing barriers which were widely used and had got significant protective benefits, functional sand-fixing barriers was made of High Density Polyethylene (HDPE) materials with the advantages of the anti-ultraviolet, long lifetime, and extreme temperature resistance. Through wind tunnel simulations, the wind-protecting efficiency was compared between uniform HDPE sand-fixing barriers and two kinds of functional HDPE sand-fixing barriers. The results showed that: (1) The effective protection distances of the three sand-fixing barriers exponentially decreased with wind speed increase. (2) The total effective protection distances of uniform sand-fixing barriers were longer than functional sand-fixing barriers under low wind speeds (<14 m·s^-1) conditions; whereas lower under high wind speeds (>14 m·s^-1) conditions. No matter how strong the winds were, the effective protection distances between nets of functional sand-fixing barriers were far longer than uniform sand-fixing barriers. (3) Both uniform HDPE sand-fixing barriers net and functional HDPE sand-fixing barriers net can substitute the traditional sand-fixing barrier materials, and have high application value and good popularization prospect. But functional sand-fixing barriers nets were suitable for making low semi-buried checkerboard sand-fixing barriers, whereas uniform sand-fixing barriers nets were more suitable for making upright sand-blocking barriers.

Key words: functional sand-fixing barrier, wind-protecting efficiency, uniform sand-fixing barrier

中图分类号:

X169

屈建军, 喻文波, 秦晓波. HDPE功能性固沙障防风效应试验[J]. 中国沙漠, 2014, 34(5): 1185-1193.

Qu Jianjun, Yu Wenbo, Qin Xiaobo. Wind-protecting Efficiency of HDPE Functional Sand-fixing Barriers[J]. JOURNAL OF DESERT RESEARCH, 2014, 34(5): 1185-1193.

参考文献

[1] 王涛.中国风沙防治工程[M].北京:科学出版社,2011.
[2] 朱震达,赵兴梁,凌裕泉.治沙工程学[M].北京:中国环境科学出版社,1998.
[3] 吴正,董治宝,李保生,等.风沙地貌与治沙工程学[M].北京:科学出版社,2003.
[4] 王文彪,党晓宏,张吉树,等.库布齐沙漠北缘不同作物秸秆平铺式沙障的防风效能[J].中国沙漠,2013,33(1):65-71.
[5] Dierickx W,Gabriels D,Cornelis W.A wind tunnel study on wind speed reduction of technical textiles used as windscreen[J].Geotextiles and Geomembranes,2001,19(1):59-73.
[6] 刘虎俊,王继和,李毅,等.塑料网方格沙障对新月形沙丘迎风坡的风沙流影响[J].水土保持学报,2011,25(5):26-29.
[7] 屈建军,凌裕泉,刘贤万,等.尼龙网栅栏防沙效应研究[J].兰州大学学报(自然科学版),2002,38(2):171-176.
[8] 张克存,屈建军,俎瑞平,等.不同结构的尼龙网和塑料网防沙效应研究[J].中国沙漠,2005,25(4):483-487.
[9] Qu J J,Han Q J,Dong G R,et al.A study of the characteristics of aeolian sand activity and the effects of a comprehensive protective system in a coastal dune area in southern China[J].Coastal Engineering,2013,77:28-39.
[10] 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.
[11] 孙昌峰,陈光辉,范军领,等.防风抑尘网研究进展[J].化工进展,2011,30(4):871-877.
[12] Cornelis W M,Gabriels D.Optimal windbreak design for wind-erosion control[J].Journal of Arid Environments,2005,61(2):315-332.
[13] Dong Z B,Qian G Q,Luo W Y,et al.Threshold velocity for wind erosion:the effects of porous fences[J].Environ Geol,2006,51(3):471-475.
[14] Bitog J P,Lee I B,Shin M H,et al.Numerical simulation of an array of fences in Saemangeum reclaimed land[J].Atmospheric Environment,2009,43(30):4612-4621.
[15] Kim H B,Lee S J.Hole diameter effect on flow characteristics of wake behind porous fences having the same porosity[J].Fluid Dynamics Research,2001,28(6):449-464.
[16] 罗万银,董治宝,钱广强.栅栏最佳孔隙度的空气动力学评价[J].中国沙漠,2009,29(4):583-588.
[17] 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.
[18] Yeh C P,Tsai C H,Yang R J.An investigation into the sheltering performance of porous windbreaks under various wind directions[J].Journal of Wind Engineering and Industrial Aerodynamics,2010,98(10/11):520-532.
[19] Rosenberg N J.Microclimate:The Biological Environment[M].New York,USA:Wiley,1974.
[20] Huang L-M,Chan H,Lee J-T.A numerical study on flow around nonuniform porous fences[J].Journal of Applied Mathematics,2012,100:1-12.
[21] Raine J K,Stevenson D C.Wind protection by model fences in a simulated atmospheric boundary layer[J].Journal of Wind Engineering and Industrial Aerodynamics,1977,2(2):159-180.
[22] Hagen L J.Windbreak design for optimum wind erosion control[C]//Proceedings of the Symposium:Shelterbelts on the Great Plains.Denver,USA,1976:20-22.
[23] Iversen J D.Comparison of wind-tunnel model and full-scale snow fence drifts[J].Journal of Wind Engineering and Industrial Aerodynamics,1981,8(3):231-249.
[24] 刘贤万.实验风沙物理与风沙工程学[M].北京:科学出版社,1995.