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设计了高120cm的4种结构HDPE阻沙网:均匀结构阻沙网(a)、大条带上疏下密式阻沙网(b,60cm宽条带)、小条带疏密相间式阻沙网(c,20或10cm宽条带)和中条带上密下疏式阻沙网(d,40cm宽条带),布设在塔克拉玛干沙漠腹地的垄间平地。阻沙试验结果表明:(1)4种结构阻沙网积沙纵断面的蚀积形态均呈单峰,但积沙宽度和高度不同,3种非均匀结构的阻沙网积沙高度均高于均匀结构阻沙网,积沙高度c>b>d>a。(2)4种结构阻沙网积沙量c>a>b>d,积沙量均集中在下风侧分布,但b和c阻沙网积沙在上风侧的积沙量高于a和d阻沙网。(3)不同结构阻沙网积沙量及其空间分布差异主要与阻沙网结构的特殊风场结构有关。
Four kinds of high-density HDPE sand screens with a height of 120cm were designed: a uniform structure of a sand-blocking net (a), a large strip of sparse sand barrier (b, 60cm wide strip), a strip of fine- The sand net (c, 20 or 10 cm wide strip) and the middle strip with the densely packed sand barrier (d, 40 cm wide strip) were laid out in the ridge land in the hinterland of the Taklamakan Desert. The results of the sand-blocking test show that: (1) The sediment deposition patterns of the sand-barrier sediments of the four kinds of structures show a single peak, but the width and height of the sediments are different. The sediment-holding sand height of the three non-uniform structures is high Sand in a uniform structure of the network, sediment height c> b> d> a. (2) The sediment concentration of the four kinds of structural sand-blocking net c> a> b> d is concentrated on the leeward side, but the sediment concentration on the windward side of the sand- d block sand network. (3) The differences of sediment concentration and its spatial distribution between different structures are mainly related to the special wind field structure of the sand-blocking network structure.