Protective effect of multi-row HDPE board sand fences:A wind tunnel study  

作　　者：Kai Zhang Peiwen Zhao Jianchang Zhao Xingxin Zhang 

机构地区：[1]College of Civil Engineering,Lanzhou Jiaotong University,Lanzhou,730000,China [2]School of Economics and Management,Lanzhou Jiaotong University,Lanzhou,730000,China

出　　处：《International Soil and Water Conservation Research》2021年第1期103-115,共13页国际水土保持研究（英文）

基　　金：supported by the Young Scholars Science Foundation of Lanzhou Jiaotong University,China(2018016);the Chang Jiang Scholar and Innovation Team Development Plan of China(IRT_15R29)。

摘　　要：Recently,sand fences,made of high density polyethylene(HDPE)board,which is resistant against harsh plateau environmental conditions,could possibly be used to control the wind-blown sand along the Qinghai section of the Golmud-Korla Railway.In this paper,wind tunnel simulation was performed on the protective effect of multiple rows of HDPE board sand fences on wind-blown sand.Two parameters have been used to reflect the protective effect of sand fences,that is,windproof efficiency and sand control efficiency,referring to the reduction rates of wind speed at a height of 0.04 m and sand flux in a run of test with the fence compared those in the control run of test without it,respectively.The test results showed that when the porosity was 30%,the single-row sand fence had the best wind proof and sand control efficiency with respective values of 46%and 65.3%.The windproof efficiencies of double-row and triple-row sand fences at 20H were 59%and 62%,respectively.Compared with the windproof effi-ciency of the single-row sand fence,those of the two-row and three-row fences increased by 13%and 16%,respectively:The maximum sand control efficiency of the double-row and triple-row sand fences were 92.1%and 96.5%,increased by 26.8%and 31.2%,respectively,compared with that of the single-row sand fence.This study indicates that the sand control efficiency after adding one or two rows was not double or triple that of the single-row fence,while the first-row sand fence played a major protective role.Compared with the double-row sand fences,the effect of the third row sand fence in triple-row sand fences is limited,and thus double-row HDPE board sand fences with the porosity of 30%are rec-ommended to control wind-blown sand along the Qinghai section of the Golmud-Korla Railway.

关 键 词：HDPE board sand fences Windproof efficiency Sand control efficiency Reasonable spacing Porosity 

分 类 号：TB33[一般工业技术—材料科学与工程]