The Test Study Of The Characteristic Of Liaoxi Aeolian Soil And It's Structural Change After Freezing And Thawing

Through the test of water content, density, proportion and the distribution of pellet of the windward soil, has studied the physical property of the windward soil systematically, the analysis of the physical parameter indicated that: the fine-grain is the main pellet in the aeolian soil pellet ingredient, its structure is compact relatively, after immerses it does not have the nature of wet falls apparently, the aeolian soil is easy to have the heave. Through the solidifies experiment of the saturated soil sample, the disturbed soil sample and the undisturbed soil sample, the displacement of the saturated soil sample is the biggest, the disturbed soil is next and the undisturbed soil sample is the smallest under the same pressure are discovered. The structure submits pressure of the aeolian soil of Fuxin area is probably 100kpa, the constitutive parameter expressed by the composite construction potential is high before it reach to its structural strength, moreover, it increases along with the pressure slightly, had reflected certain structure adjustment and the dense effect, then, the structure joint meets the destruction, the constitutive coefficient obviously reduces, the speed which reduces increases along with the pressure but reduces gradually, finally, it basically stabilizes in a level. The aeolian soil studied in this article is different with other local earth constitutive properties obviously. Through the aeolian soil's freezing and thawing test research, discovered in the heave process of soil body, the migration the of moisture content is from the warm end to the cold end, the temperature and the water content have great influence to the soil body heave, after the freezing and thawing the soil body intensity obviously changes. Has carried on the observation using the microscope to the process of freezing and thawing of soil body, discovered that: because the aqueous phase turns the ice volume expansion, changed the earth microscopic structure, causes the void ratio of the soil body increase, at the same time the ice intensity causes the frozen earth intensity increase remarkably. After the melting of soil body, the earth pellet's arrangement and the joint cannot return to the original condition, the pellet hole are bigger than that of unfrozen, thus causes the earth the structure to be loose, the mechanical properties have had the change.