Study On Aeolian Sand Replacement Subgrade In Hetao Saline Soil Area Of The Vicinity Of Lin-ha Expressway

The expressway of Linhe-Hami is an important project for the western development of the country,The project is located in the Linhe of the Inner Mongolia to the Hami of the Xinjiang.Among them,Inner Mongolia Hetao K50?K67 Department,Soil is saline soil in the irrigation area.The formation of secondary salinization of soil is mainly caused by water diversion from the Yellow River in Hetao irrigation area,The proportion of irrigation and drainage was losed balance,the underground water table was raised,So that the salinity of groundwater in the arid climate of strong evaporation and moved to the surface.Resulting in local salinization is more serious.As the most important part of the overall structure of the highway,Especially under the influence of expansive of the saline soil.Will intensify the subgrade frost boil and frost heave and other diseases.Damage to the stability of the highway.So,For highway construction in saline soil area.The research contents are as follows:(1)The basic properties and mechanical properties of saline soil are analyzed,and combined with the geological conditions of the project,To determine the application of aeolian sand in Saline Soil Subgrade.(2)According to the particle analysis and mechanical properties test of aeolian sand,Study on the Performance of Aeolian sand subgrade.(3)Study on the Way of Treating Saline Soil Foundation and the Construction Technology and Technical Parameters of Aeolian Sand Subgrade Filling.