Study On The Structural Characteristic Of Aeolian Soil In The East Of Liaoning Province Under Freezing And Thawing Function

The physical property and mechanics property of aeolian soil in the west of Liaoning province is studied systematically by percent moisture content test, density test, specific density test, mechanical analysis test, crucial water-content coefficient test, consolidation test, compaction test, triaxial compression test. The soil's initial structural characteristic is also gained by comparing analysis in the middle of experiment.Considering the influence of temperature, percent moisture content, load, dry density, the ground water burying depth five primary factors, freeze-thaw experiment scheme adopts 5 factors 9 levels-Uniform Design. The various factors influence as well as the temperature field, the moisture field, the frost-heave force change rule are analyzed according to the test result. Using the software'WUST'establishes the forecast model based on Uniform Design and uses the establishment model to forecast different temperature, load, percent moisture content, the dry density and the groundwater level condition the soil frozen-heave quantity and thaw-sedimentation quantity.The observation of freezing and thawing influence to the soil microscopic structural characteristic is gained through the microscopic observation and control software. The strength and distortion characteristic reflect macroscopic influence to the structural property.After experiment and theoretical analysis, I establish the reflection freezing and thawing to the soil structural characteristic influence dynamic structural parameter. Based on the damage theory, considered the freezing and thawing function, taken the structural parameter as damage radio, I establish soil structural model. Because the structural parameter has contained the temperature field, the moisture field, the stress field mutual function to the structural influence, therefore this model has reflected the temperature field, the temperature field, the moisture field, and the stress field coupling function indirectly.