Abstract:Taking the highway construction in desert area as the background, aiming at the special subgrade treatment and the difficult problems of highway engineering in the desert area, a kind of aeolian-sand subgrade structure with gravel soil interlayer is designed and innovated. The relationship between each affecting factor and the aeolian-san subgrade performance with gravel soil interlayer is revealed through the tests. A kind of construction technology and rolling method of aeolian-sand subgrade with gravel soil interlayer combined with dry and wet is proposed for application. Since the applied project is checked, accepted and open to traffic, the service performance of the subgrade in the aeolian-sand filling section is good, and the pavement driving is safe and comfortable without the quality defects. The structure and construction method of the aeolian-sand subgrade can be referred for the filling structure selection and the construction technology operation of aeolian-sand subgrade in the desert area.
