Abstract: Engineering research in aeolian sand environment has important significance to the regional economy development.This paper,taking the sandlands on Ordos Plateau and Alxa Plateau as test sites,studied the physical and mechanics property of aeolian sandy soil.The soil samples from Hobq sandland and Tengger sandland are uniform on granularity and chemical components because of the similar genesis and environment condition of aeolian sand.Samples from Mu Us Sandland have some differences with that from these two sandlands in granularity and chemical components.Comparison test showed that the shear stress of these three type sands is relative high;the natural and the dry weigh are about the same;the dry density both in the loosest and the densest states also have small differences.It can control the compactness of earth-fill engineering.According to direct shear friction test and pullout friction test,it was proved that the compound material of geogrid and aeolian sand had reinforced the mechanics and engineering function of aeolian sand.

Key words: aeolian sand, mechanics properties, mineral chemical composition, Geogrid reinforced aeolian sand