中文摘要：

模型按1：10比例设计，在7、15和20m／s的实验风速下，对不同规格和孔隙度的土工格栅沙障模型进行风洞模拟实验，测定其防风与积沙效应。结果表明：不同规格格栅沙障的风速流场趋势相同，在障前、障中和障后形成4个减速区和3个加速区。障前、障后风速降低是土工格栅沙障防沙的主要机制；障中的增速区是引起沙障中部不积沙或少积沙的诱因。格栅沙障因障间互相连接而增强了防护功能，使得流沙被有效地控制在体系内部。同一规格的沙障，障内积沙厚度随着风速的增大而增大，随着距沙源距离的增加而减小。不同规格的沙障，障内积沙厚度随着规格的增大而减小，随着孔隙度的增大而减小。不同风速下，不同规格沙障间积沙厚度差异显著。从积沙厚度和防沙目的分析，10cm×10cm规格的沙障积沙效应最好，10cm×20cm次之，20cm×20cm最差。在设计与设置沙障时需要考虑成本、防护目的和沙源等多方面的因素。

英文摘要：

The model was designed with 1 ： 10 scale, and the testing wind velocity consisted of 7 m/s, 15 m/s and 20 m/s. Effect of controlling wind and deposited sand of geogrid sand-barrier with different size and porosity was measured under wind tunnel test. The results are as follows： The trend of wind flow field is same to different size geogrid barriers, there shaped four speed-down regions and three speedup regions before, inside and after barriers. It was the preventing mechanism of barriers to decrease wind speed and deposit sands before and after barriers. And the wind speedup region of middle barriers provided occasion for no or less deposited sand in barriers middle. The fence function increase because of barriers be joined, and the shifting sand can be effectively controlled inner the barriers system. To the same size barrier, the thickness of deposited sand increasedwith wind velocity, and decreased with the distance to sand source. The thickness of deposited sand decreased with size and porosity to different size barriers. The thickness of deposited sand have notable difference to different size barriers with different wind speed. According to the deposited sand depth and the preventing intention, the best ability of deposition of sand-barrier was 10 cm × 10 cm scale, 10 cm × 20 cm was better, and 20 cm × 20 cm was worst. Furthermore, It need to be considered various factors such as cost, fence objective and sand source so on when designed and setting geogrid barriers.