According to the physical and mechanical speciality of reinforced aeolian sand and by the way of elasto-plasticiy FEA to study the reinforced aeolian sands strength and deformation performance,and adopt the geo-grid as the reinforcement material strength the sand soil that gathered by wind and increase the strength and stability of soil body,so as to improve the soil strength and stablity.

Indoor model tests have been made for the study of the uplift load of spread foundation on reinforced aeolian sand subgrade.

After studing test projects,indoor model uplift tests on the spread foundation of reinforced aeolian sand subgrade have been done.

Fourteen types of geo-grid reinforced aeolian sand are selected in the model tests to show that the pressure-bearing capacity of geo-grid reinforced aeolian sand is 11.

Based on reinforced soil retaining wall structure of whole rigid panel,deformation of reinforced aeolian sand retaining wall,strain distribution of geosynthetics and working mechanism of reinforced aeolian sand retaining wall were researched.

In order to investigate the deep-footing mechanism of reinforced sand,a series of results from plane strain laboratory model test with different number of reinforced layers,are simulated by a nonlinear FEM analysis incorporating an elasto-plastic constitutive model for sand.

By conducting a series of plane strain compression tests on reinforced sand,the reinforcing effects of geo-grid reinforcement shape and rigidity were studied.

In order to obtain a better understanding of the bearing capacity characteristics of reinforced sandy ground with different reinforcement lengths,results from plane strain laboratory model tests are simulated by a nonlinear FEM analysis incorporating an elasto-plastic constitutive model.