摘要
阻沙栅栏作为沙漠公路防护的第一道屏障,对公路安全至关重要,采用CFD数值模拟,对比分析阻沙栅栏改进前后防风阻沙效果,结果表明:采用阻沙栅栏高度2.5 m、布设间距20 m改进方案时,相较改进前,第一、二道阻沙栅栏间近地表水平风速和平均防风效率变化不大;第二、三道阻沙栅栏间和第三道阻沙栅栏至高立式大网格沙障间,近地表水平风速分别降低了13.63%和17.63%,平均防风效率分别提高10.26%和18.46%;三道阻沙栅栏后方区域积沙厚度分别增加了15.79%、50%和40%。采用改进方案时,沙粒沉积范围完全覆盖整个积沙区间,路堤顶面积沙明显减少,具有良好的防风阻沙效果。
As the first barrier for desert highway protection,the sand barrier fence is very important to the safety of the route.The CFD numerical simulation is used to compare and analyze the effect of windproof and sand prevention before and after the improvement of the sand barrier fence.The results show that the near-surface horizontal wind speed and average wind-proof efficiency between the first and second fences have little change in the improvement scheme of sand blocking fence with the height of 2.5 m and the spacing of 20 m,compared with that in the initial scheme of sand-blocking fence with 2.O m in height and 25 m in spacing.The near-surface horizontal wind speed decrease by 13.63% and 17.63%,and the average wind-proof efficiency increase by 10.26% and 18.46% between the second and third sand-blocking fences and between the third sand-blocking fence and the high-vertical large-grid sand barrier,respectively.The thickness of sand accumulation in the rear area of the three sand-blocking fences increase by 15.79%,50% and 40% respectively.When the improved scheme is adopted,the sand deposition range completely covers the entire sand accumulation area,and the sedimentation on the top of the embankment is significantly reduced,which means the improvement scheme has a better windproof and sand prevention effect.
作者
李良英
李琦
王旭
辛国伟
王振强
LI Liang-ying;LI Qi;WANG Xu;XIN Guo-wei;WANG Zhen-qiang(School of Civil Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China)
出处
《泥沙研究》
北大核心
2025年第2期67-73,80,共8页
Journal of Sediment Research
基金
青年科学基金项目(12302511)
宁夏交通运输厅科技项目(20200173)
中央引导地方科技发展资金项(22ZY1QA005)。
关键词
沙漠公路
防护措施
阻沙栅栏
数值模拟
保护效果
desert highway
protection measures
sand-blocking fence
numerical simulation
protection effect
作者简介
李良英(1979-),男,山西原平人,副教授,博士研究生,主要从事道路交通安全与风沙防护方面研究。E-mail:liliangying@mail.lzjtu.cn;通信作者:李琦(1999-),女,甘肃金昌人,硕士研究生,主要从事道路风沙灾害防治方面研究。E-mail:liqi19991030@163.com。
