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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。
Experiments were conducted to study the basic properties of natural saline soils along the Heze-Korla Expressway in Yanqi, Xinjiang, and the natural salty soil of silt and clayey soil was chosen for the experimental study under repeated freeze-thaw cycles in an open system. The salt expansion of chloride saline soil was studied from the perspective of soil type and salinity. The results show that during the freeze-thaw cycles, the salt-swelling accumulation of the chlor-saline soil in low-liquid-limit clay is the best, followed by the saline-saline soil in the low-liquid-limit silt, The salt expansion of the saline-alkali soil in low-liquid-content silt increases with the decrease of temperature and decreases with the increase of temperature; The amount of swelling increased with the increase of water content. The salt expansion characteristics of chlorinated saline soil in low-liquid-content clay decreased with the increase of salt content.