INFLUENCE ON STRENGTH OF SITE SOILS ABOUT CHLORINE AND SULFATE SALT IN DRY ENVIRONMENT

In order to explore the influence of salt content on strength of site soils, this paper is based on the laboratory test that join in two soluble salts with the gradient of 0.2% of NaCl and Na2SO4 to the desalination soil, and test the change of uniaxial compressive strength, tensile strength, elastic wave velocity and the ability to resist wind erosion of the soils which include particular and category saline in dry environment. The results show：under the condition of indoor environment, the existence of salt plays the role of a certain cement solidified to site soils, making the strength of the soil corresponding increase, and the cement solidification of sulfate is more than chlorine salt significantly to soils. The uniaxial compressive strength and tensile strength present the form of index increased; the elastic wave velocity in vertical and parallel direction of the suppression present increasing trend with the increasing of salt content; the loss of wind erosion increases with the increasing speed of carrying sand wind, and under the speed of 18ms-1 of carrying sand wind, the loss of wind erosion decreases with the increasing speed of carrying sand wind to salt samples. It showed the form of gradual damage.