Study on the Water-Salt Migration Pattern of Ili Salinized Loess under Freeze-Thaw Conditions

  • Bao Weixing ,
  • Wu Qian ,
  • Wu Qian ,
  • Qin Chuan ,
  • Hou Tianqi
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  • School of Highway, Chang'an University, Xi'an 710064, P. R. China

Received date: 2025-02-17

  Online published: 2025-12-31

Abstract

In order to study the influence of different water content and salt content on the water-salt migration mechanism of Ili salinized loess. The water-salt migration test of saline loess under the action of the freeze-thaw cycle was carried out, and the temperature, moisture, and salt fields and their cohesion change rules were analyzed. The study shows that under the action of freezing and thawing, the temperature field, moisture field and salt field of saline loess show cyclic changes. With the increase of the number of freezing and thawing cycles, the water content of the soil column as a whole is increased, showing a pattern of high water content at the two ends and low water content in the middle. The change of salts in the soil layer under freezing and thawing is consistent with the overall change of moisture, and the salts in each soil layer show a homogeneous distribution before the unfreezing and thawing. Under the effect of temperature potential, the water carries the salts to migrate upward, resulting in higher salinity in the middle and upper part of the soil column. The increase of water content and salinity has a promoting effect on the migration of water and salts. In addition, the increase in water content will have a lubricating effect between the soil particles, resulting in the cohesion of the sample with low water content being greater than that of the sample with high water content. With the increase of salt content, the agglomerates formed by the salt crystals wrapped around the soil particles play the role of skeleton, which makes the cohesion of the specimen with high salt content larger than that of the specimen with low salt content, the value of internal friction angle of salinized loess after freeze-thawing shows a wave distribution.

Cite this article

Bao Weixing , Wu Qian , Wu Qian , Qin Chuan , Hou Tianqi . Study on the Water-Salt Migration Pattern of Ili Salinized Loess under Freeze-Thaw Conditions[J]. Chinese Journal of Underground Space and Engineering, 2025 , 21(6) : 1976 -1987 . DOI: 10.20174/j.JUSE.2025.06.14

References

[1] 张爱军, 邢义川, 胡新丽, 等.伊犁黄土强烈自重湿陷性的影响因素分析[J].岩土工程学报, 2016, 38(增2): 117-122.(Zhang Aijun, Xing Yichuan, Hu Xinli, et al.Influence factors of strong self-weight collapsibility of Ili loess[J].Chinese Journal of Geotechnical Engineering, 2016, 38(Supp.2): 117-122.(in Chinese))
[2] Cary J W,Maylang H F.Salt and water movement in unsaturated frozen soil[J].Soil Science Society of America Journal, 1972, 4(36): 549-555.
[3] Mageau D, Morgenstern N.Observations on moisture migration in frozen soils[J].Canadian Geotechnical Journal, 1980, 1(17): 54-60.
[4] 包卫星, 谢永利, 杨晓华.天然盐渍土冻融循环时水盐迁移规律及强度变化试验研究[J].工程地质学报, 2006(3): 380-385.(Bao Weixing, Xie Yongli, Yang Xiaohua,et al.A laboratory test study on water and salt migration in natural saline soils and associated shear strength changes under freezing and thawing cycles[J].Journal of Engineering Geology, 2006(3):380-385.(in Chinese))
[5] 杨晓华, 刘伟, 张莎莎, 等.温度变化对粗粒硫酸盐渍土路基变形影响分析[J].中国公路学报,2020,33(3): 64-72.(Yang Xiaohua, Liu Wei, Zhang Shasha, et al.Influence of temperature change on deformation of coarse-grained sulfate saline soil subgrade[J].China Journal of Highway and Transport, 2020, 33(3): 64-72.(in Chinese))
[6] 周凤玺, 高国耀.非饱和土中热湿盐多场耦合过程分析[J].岩土工程学报, 2019, 41(5): 813-820.(Zhou Fengxi, Gao Guoyao.Multi-field coupling process of heat-moisture-salt in unsaturated soil[J].Chinese Journal of Geotechnical Engineering, 2019, 41(5): 813-820.(in Chinese))
[7] 吕擎峰, 常承睿, 马博, 等.固化硫酸盐渍土水盐迁移的试验研究[J].岩石力学与工程学报, 2018, 37(增2): 4290-4296.(Lü Qingfeng, Chang Chengrui, Ma Bo, et al.Experimental study on water and salt migration of solidified sulphate saline soil[J].Chinese Journal of Rock Mechanics and Engineering, 2018, 37(Supp.2): 4290-4296.(in Chinese))
[8] 吴道勇, 赖远明, 马勤国, 等.季节冻土区水盐迁移及土体变形特性模型试验研究[J].岩土力学, 2016, 37(2): 465-476.(Wu Daoyong, Lai Yuanming, Ma Qinguo,et al.Model test study of water and salt migration and deformation characteristics in seasonally frozen soil[J].Rock and Soil Mechanics, 2016, 37(2): 465-476.(in Chinese))
[9] 应赛, 周凤玺, 文桃, 等.盐渍土冻结过程中的特征温度研究[J].岩土工程学报, 2021, 43(1): 53-61.(Ying Sai,Zhou Fengxi,Wen Tao,et al.Characteristic temperatures of saline soil during freezing[J].Chinese Journal of Geotechnical Engineering, 2021, 43(1): 53-61.(in Chinese))
[10] Li S Y, Zhang M Y, Pei W, et al.Experimental and numerical simulations on heat-water-mechanicsinteractionmechanism in a freezing soil[J].Applied Thermal Engineering, 2018, 132: 209-220.
[11] 陈伟志, 张莎莎, 李安洪.温度循环下压实粗粒盐渍土水盐迁移与变形响应[J].岩土力学, 2022, 43(增2): 74-84, 94.(Chen Weizhi, Zhang Shasha, Li Anhong.Waterand salt migration and deformation response of compacted coarse-grained saline soil under temperature cycle[J].Rock and Soil Mechanics, 2022, 43(Supp.2): 74-84, 94.(in Chinese))
[12] 张彧, 房建宏, 刘建坤, 等.察尔汗地区盐渍土水热状态变化特征与水盐迁移规律研究[J].岩土工程学报, 2012, 34(7): 1344-1348.(Zhang Yu, Fang Jianhong, Liu Jiankun, et al.Variation characteristics of hydrothermal state and migration laws of water and salt in Qarhan Salt Lake region[J].Chinese Journal of Geotechnical Engineering, 2012, 34(7): 1344-1348.(in Chinese))
[13] 肖泽岸, 赖远明, 尤哲敏.单向冻结过程中NaCl盐渍土水盐运移及变形机理研究[J].岩土工程学报, 2017, 39(11): 1992-2001.(Xiao Zean, Lai Yuanming, You Zhemin.Water and salt migration and deformation mechanism of sodium chloride soil during unidirectional freezing process[J].Chinese Journal of Geotechnical Engineering, 2017, 39(11): 1992-2001.(in Chinese))
[14] 张留俊, 裘友强, 张发如, 等.降水入渗条件下氯盐渍土水盐迁移规律[J].交通运输工程学报, 2023, 23(4):116-127.(Zhang Liujun, Qiu Youqiang, Zhang Faru, et al.Water-salt migration rules in chlorine saline soil under precipitation infiltration[J].Journal of Traffic andTransportation Engineering, 2023, 23(4): 116-127.(in Chinese))
[15] Zhou L Z, Zhou F X, Ying S, et al.Study on water and salt migration and deformation properties of unsaturated saline soil under a temperature gradient considering salt adsorption: Numerical simulation and experimental verification[J].Computers and Geotechnics, 2021, 134:104094.
[16] Zhang X, Wang Q, Wang G, et al.A Study on the coupled model of hydrothermal-salt for saturated freezing salinized soil[J].Mathematical Problems in Engineering, 2017, 2017: 1-12.
[17] 冯瑞玲, 蔡晓宇, 吴立坚, 等.硫酸盐渍土水—盐—热—力四场耦合理论模型[J].中国公路学报, 2017, 30(2): 1-10.(Feng Ruiling, Cai Xiaoyu, Wu Lijian,et al.Theoretical model on coupling process of moisture-salt-heat-stress field in sulfate salty soil[J].China Journal of Highway and Transport, 2017, 30(2): 1-10.(in Chinese))
[18] Han Y, Wang Q, Wang N, et al.Effect of freeze-thaw cycles on shear strength of saline soil[J].Cold Regions Science and Technology, 2018, 154:42-53.
[19] 周泓, 张豫川, 张 泽, 等.冻融作用下冻结黄土黏聚力长期强度变化规律[J].岩土力学, 2014, 35(8): 2241-2246.(Zhou Hong, Zhang Yuchuan, Zhang Ze, et al.Changing rule of long-term strength of frozen loess cohesion under impact of freeze-thaw cycle[J].Rock and Soil Mechanics, 2014, 35(8): 2241-2246.(in Chinese))
[20] Wan X S, Liao M K, Du L Q.Experimental studyon the influence of temperature on salt expansion of sodium sulfate saline soil[J].Journal of Highway and Transportation Research and Developent, 2017, 11(3): 1-7.
[21] 陈炜韬, 王 鹰, 王明年, 等.冻融循环对盐渍土黏聚力影响的试验研究[J].岩土力学, 2007(11): 2343-2347.(Chen Weitao, Wang Ying, Wang Mingnian, et al.Testing study on influence of freezing and thawing circulation on saline soil's cohesion[J].Rock and Soil Mechanics,2007(11):2343-2347.(in Chinese))
[22] 牛丽思, 张爱军, 赵佳敏, 等.易溶盐含量对伊犁原状黄土力学特性的影响规律[J].岩土工程学报, 2020, 42(9): 1705-1714.(Niu Lisi, Zhang Aijun, Zhao Jiamin, et al.Influences of soluble salt content on mechanical properties of Ili undisturbed loess[J].Chinese Journal of Geotechnical Engineering, 2020, 42(9): 1705-1714.(in Chinese))
[23] 许健, 张明辉, 李彦锋, 等.Na2SO4盐渍原状黄土冻融过程劣化特性试验研究[J].岩土工程学报, 2020, 42(9): 1642-1650.(Xu Jian, Zhang Minghui, Li Yanfeng, et al.Experimental study on deterioration behavior of saline undisturbed loess with sodium sulphate under freeze-thaw action[J].Chinese Journal of Geotechnical Engineering, 2020, 42(9): 1642-1650.(in Chinese))
[24] 王中攀, 丁黔, 陈克政, 等.冻融循环对重塑碳酸盐渍土不排水强度影响研究[J].冰川冻土, 2023, 45(3): 1026-1035.(Wang Zhongpan, Ding Qian, Chen Kezheng, et al.Effect of freeze-thaw cycles on undrained strength of remoulded saline-alkali soil[J].Journal of Glaciology and Geocryology, 2023,45(3):1026-1035.(in Chinese))
[25] 王海涛, 张远芳, 成峰, 等.冻融循环作用下盐渍土抗剪强度变化规律研究[J].地下空间与工程学报, 2016, 12(5): 1271-1276.(Wang Haitao, Zhang Yuanfang, Cheng Feng, et al.Study on the shear strength change laws of the saline soil subjected to freeze-thaw cycle[J].Chinese Journal of Underground Space and Engineering, 2016, 12(5): 1271-1276.(in Chinese))
[26] 万旭升, 赖远明.硫酸钠溶液和硫酸钠盐渍土的冻结温度及盐晶析出试验研究[J].岩土工程学报, 2013, 35(11): 2090-2096.(Wan Xusheng, Lai Yuanming.Experimental study on freezing temperature and salt crystal precipitation of sodium sulphate soulotion and sodium sulphate saline soil[J].Chinese Journal of Geotechnical Engineering,2013, 35(11): 2090-2096.(in Chinese))
[27] 肖泽岸, 赖远明.冻融和干湿循环下盐渍土水盐迁移规律研究[J].岩石力学与工程学报, 2018, 37(增1): 3738-3746.(Xiao Zean, Lai Yuanming.Study on water and salt transfer mechanism in saline soil under freezing-thawing and dry-wet conditions[J].Chinese Journal of Rock Mechanics and Engineering, 2018, 37(Supp.1): 3738-3746.(in Chinese))
[28] 包卫星, 吴倩, 吴谦, 等.冻融循环作用下伊犁盐渍化黄土力学特性[J].岩石力学与工程学报,2024,43(7):1775-1787.(Bao Weixing,Wu Qian,Wu Qian, et al.Mechanical properties of Ili salinized loess under freeze-thaw conditions[J].Chinese Journal of Rock Mechanics and Engineering,2024,43(7):1775-1787.(in Chinese))
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