细粒氯盐渍土盐胀特性试验研究

对新疆焉耆地区和硕～库尔勒高速公路沿线的天然盐渍土进行室内基本性质试验分析,选取粉土、粘土类天然盐渍土,在开放系统中进行反复冻融循环条件下的试验研究.从土类及盐性角度研究了氯盐渍土的盐胀规律.试验结果表明:在冻融循环过程中,低液限粘土中氯盐渍土盐胀累加性最好,低液限粉土中氯盐渍土次之,低液限粘土强氯盐渍土不具有盐胀累加性;低液限粉土中氯盐渍土盐胀量都随着温度的降低而增加,随着温度的升高而减小;低液限粘土中氯盐渍土的最大盐胀量随着含水量的增大而增加;低液限粘土中氯盐渍土的盐胀特性随含盐量的增大而降低.

Test and Research on Salt Expansion Property of Fine Chlorine Saline Soil

On the basis of the results of testing saline soil samples of He-Ku Expressway,the silt and clay crude saline soil samples are selected for the experiment of freezing and thawing cycles in the laboratory.The salt expansion laws of chlorine saline soil are researched from soil types and salt.The results of test show that salt expansion value of the medium chlorine saline soil of low liquid limit clay has the best accumulation,the medium chlorine saline soil of low liquid limit silt follows and the intensity chlorine saline soil of low liquid limit clay do not have expansion accumulation.The salt expansion values of the medium chlorine saline soil of low liquid limit silt increase with the lowering temperature and decrease with increasing temperature.The maximum of salt expansion values of the medium chlorine saline soil of low liquid limit clay increase with the increasing water content.The salt expansion values of chlorine saline soil of low liquid limit clay decrease with the increasing salt content.