Wind-blown sand disasters, as an environmental problem, have great impact on human activities. Sand fence has been recognized as an efficiency technology in anti-desertification engineering and is wildly applied to protect highways and railways around the desert. But few people study its protection to Gobi buildings, which may also suffer from sand disaster. To study its protection to Gobi buildings, we systemically investigate the three-dimensional structure of wind field and sand distribution around sand fence for buildings by Computational Fluid Dynamic simulations and wind-tunnel experiments. The dependencies of sand-prevention efficiency on fence height, porosity, inclined slat angle and wind speed are proposed respectively. An optimal height of sand fence is suggested to be 2.0 m−2.5 m, and an optimal porosity is 10%−15%, by synthetically considering the factors of sand prevention efficiency and construction cost; the slat angles of inclined fence is recommended as 135°−150° for maximizing the sand sedimentation on the windward side of fence.

风沙灾害作为一种环境问题，对人类活动具有重大影响。防沙网已被公认为是抗沙漠化工程中的一种高效技术，并广泛用于保护沙漠周围的公路和铁路。但是很少有人研究它对戈壁建筑物的保护，而戈壁建筑物也可能遭受沙尘灾害。为了研究其对戈壁建筑物的保护，我们通过计算流体动力学模拟和风洞实验系统地研究了建筑物的防风结构和风沙分布的三维结构。分别提出了防沙效率与围栏高度，孔隙率，板条斜角和风速的关系。砂栅的最佳高度建议为2.0 m-2.5 m，最佳孔隙度为10％-15％，综合考虑防沙效率和施工成本的因素；建议将倾斜围栏的板条角设为135°-150°，以最大程度地增加围栏迎风侧的沙子沉积。