Study On The Characteristic Of The Coarse Grain Clay Sulfate Salty Soil

The salt expansion of the saline soil mean nature in the soil body suffers indignities the phenomenon of the variety creation physical volume inflation of wait the period. The factors controlling behavior of salt expansion are soil, water, salt, temperature and pressure .In the paper , the single salty swelling experiment in the condition of (no) loads , freezing and thawing cycles experiment and water and solute migration experiment after freezing and thawing cycles are done , mainly studying the salt expansion of gravel sulfate salty soil, the salt expansion of sand formation sulfate salty soil , the salt expansion of sandy soil sulfate salty soil and the salt expansion of nature coarse grain clay saline soil . And carried on the tiny particle soil different content's research on the coarse grain clay sulfate salty soil characteristic influence.On this foundation , using not linear regression analysis to imply the salt expansion characteristic and influence factors of coarse grain clay sulfate salty soil, for constructing the engineering, such as road, bridge and tunnel etc. to provide the more dependable and more economic data basis.