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通过对新疆奎屯至克拉玛依高速公路路基盐渍土在开放系统中进行反复冻融循环条件下的盐胀特征试验研究,在不同含水率条件下研究了奎克高速公路路基盐渍土的盐胀规律。试验结果表明:路基盐渍土在冻融循环过程中的盐胀过程可被分为3个阶段;路基盐渍土盐胀量随着含水率的增大而增大,在最佳含水率时为最大值;随着冻融循环次数的增加,盐胀量增长速度逐渐降低;粗颗粒盐渍土在多次冻融循环条件下的盐胀量累加性较为显著。
Through the experimental study on the salt expansion characteristics of the subgrade saline soil of Kuitun-Karamay Highway in Xinjiang under the open system with repeated freezing and thawing cycles, the salt expansion law of subgrade saline soil under Quik-Expressway was studied under different moisture content . The experimental results show that the salt expansion process of subgrade saline soil can be divided into three stages during the freeze-thaw cycle. The amount of salt expansion of subgrade saline soil increases with the increase of water content. With the increase of the number of freeze-thaw cycles, the growth rate of salt expansion decreased gradually. The accumulation of salt expansion of coarse-grained saline soils under multiple freeze-thaw cycles was significant.