在远离公路的上风侧,选择适当部位,通过层层设置阻沙设施,藉以削弱风力,拦阻来沙,达到限制沙源(或沙丘)前移,从而防止构成对公路的危害的目的,是公路建设中需要解决的问题之一。阻沙设施适用于沙源丰富的地带。根据当地材料产状,可设置不透风的和透风的两类阻沙设施,前者以土石为主要材料,后者以灌木枝条为主要材料。阻沙设施一般设置在距路基百米以外的上风侧。一、阻沙设施 On the windward side far from the road, select the appropriate site and set up sand-blocking facilities at various levels to weaken the wind and block the arrival of sand so as to prevent the sand source (or sand dune) from moving forward so as to prevent the harm caused to the road. One of the problems to be solved in construction. Sand-blocking facilities apply to the sand-rich areas. According to the local materials, two types of impervious and air-permeable sediment-blocking facilities can be set up. The former takes earth and rock as the main material and the latter shrub branches as the main material. Sand-blocking facilities are generally located on the windward side of a hundred meters away from the embankment. First, the sand blocking facilities