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以穿越浑善达克沙地省际通道两侧公路防护带为试验区,以黄柳(Salix gordejevii Y.L.Chang et Skv.)和小红柳(Salix microstachya Turcz.)为主要材料设置的高立式柳条沙障阻沙带和半隐蔽式方格沙障固沙带构成的公路沙障带的防风固沙效益为研究对象,通过对公路两侧不同沙害发生地段的沙障带内风速、输沙量测定,分析风速变化、防风效益和地表粗糙度以及风沙流结构。结果表明:在平缓流沙地、风蚀窝状沙坑、挖方段沙质陡坡等主要公路沙害地段,风速在沙障带带内及其上空,都表现出较强的线形规律,其中沙障带在平缓流沙地风速变化线形规律最强,风速在50m宽的阻沙带中心及固沙带内显著降低,粗糙度渐增,防风效能提高。高立式柳条沙障阻沙带阻聚外源流沙主要发生于阻沙带前锋26m宽范围内,防护带其余近公路54m宽流沙地得到有效控制,表面保持稳定。
A series of high-grade wicker with Salix gordejevii YLChang et Skv. And Salix microstachya Turcz. As the main material were used to cross the road protection belt on both sides of the inter-provincial thoroughfare in Hunshandake Sandy Land. Sand barrier barrier and semi-concealed grid sand barrier sand belt formed by sand-fixing system of wind-affected and sand-fixing benefit as the research object, through the sand on both sides of the road where the occurrence of sandstorm band wind speed, sediment load determination , Analyzing changes in wind speed, windbreaking benefits and surface roughness, and wind and sand flow structures. The results show that there are strong linear regularity in wind speed in the sandy sand, wind-eroded littoral bunker and sand-steep slope in the section of sand road, The wind speed in flat sand litter has the strongest linearity rule, and the wind speed is significantly reduced within 50m width of the center of the sand belt and in the sand belt, increasing the roughness and improving the windbreaking performance. High vertical wicker sand barrier impeding sandblasting external source mainly occurs in the confluence of sand drift striker 26m wide range, the remaining protective belt near the road 54m wide sand is effectively controlled, the surface remained stable.