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大庆盐渍土水热迁移数值模拟研究

JIANG Chengxi, ZHENG Xin,XIE Hengyan,XU Wenbao, CHENG Zheng

Low Temperature Architecture Technology(2023)

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Abstract
大庆位于黑龙江省西部、松辽盆地北部,存在大量碳酸盐渍土.盐渍土冻胀融沉的特性会导致水渠、路基表面衬砌破坏.利用Comsol进行开放系统下梯形渠道盐渍基体土有限元建模并将有限元模拟结果与试验结果进行对比,模拟结果能较好的与试验结果相对应.同时进行不同工况下有限元拓展试验得到同一温度下,7种不同含水率变化条件下水分迁移情况.在3次冻融循环下土体冻胀力最大值出现在首次冻融时.
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Key words
salt-alkali soil,hydrothermal migration,freeze-thaw cycle,open system,numerical simulation
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