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

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摘要为了探索硫酸钠盐渍土的盐胀与冻胀机理,对硫酸钠溶液分别在环境温度-20℃和变环境温度-5℃～-10℃下进行降温试验；并对硫酸钠盐渍土在环境温度-20℃下进行降温试验,通过试验研究了硫酸钠溶液和硫酸钠盐渍土中芒硝的析出规律及各自的冻结温度。试验表明：在相同外界环境温度下,浓度大的溶液,芒硝更容易析出；具备一定浓度的溶液,在环境温度变化缓慢条件下更容易析出但溶液的冻结温度的趋势一致；相同浓度硫酸钠盐渍土的冻结温度均低于硫酸钠溶液的冻结温度,随着含盐量增加,其冻结温度降低；在相同外界环境温度下,盐晶在土体中更容易析出。

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关键词 ：硫酸钠盐溶液, 冻结温度, 盐晶

Abstract：In order to study the mechanism of salt heave and frost heave of sodium sulphate saline soil, the cooling experiments are designed for the sodium sulfate solution at -20℃ environment temperature and in changing temperature ranging from -5℃ to -10℃ and for the sodium sulphate saline soil at -20℃ temperature. It is tried to find the laws of precipitation of mirabilite in the sodium sulfate solution and the sodium sulphate saline soil and their freezing points. The experiments show that at the same environment temperature, a higher concentration of solution leads to an easier precipitation of mirabilite. In the same concentration of solution, a relatively slow environment temperature variation changes precipitation of mirabilite more easily, and the rules of freezing points of the solutions are the same. Compared with that of the sodium sulfate solution, the freezing point of the sodium sulphate saline soil is lower, and at the same environment temperature, salt crystals are more likely to precipitate in the soil.

Key words： sodium sulfate solution freezing point salt crystal

收稿日期: 2013-04-01

TU448

基金资助:国家自然科学基金项目（41230630）

作者简介: 万旭升（1987- ），男，甘肃静宁人，博士研究生，主要从事寒区工程数值模拟与计算。E-mail: xinyanwanxxusheng@163.com。

引用本文:

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 Xu-sheng, LAI Yuan-ming. Experimental study on freezing temperature and salt crystal precipitation of sodium sulphate soulotion and sodium sulphate saline soil. Chinese J. Geot. Eng., 2013, 35(11): 2090-2096.

链接本文:

http://manu31.magtech.com.cn/Jwk_ytgcxb/CN/ 或 http://manu31.magtech.com.cn/Jwk_ytgcxb/CN/Y2013/V35/I11/2090

[1] 罗伟甫. 盐渍土地区公路工程[M]. 北京: 人民交通出版社, 1980. (LUO Wei-fu. Highway engineering in saline soil regoins[M]. Beijing: China Communications Press, 1980. (in Chinese))
[2] 高江平, 吴家惠, 邓友生, 等. 硫酸盐渍土膨胀规律的综合影响因素的试验研究[J]. 冰川冻土, 1996, 18(2): 170-177. (GAO Jiang-ping, WU Jia-hui, DENG You-sheng, et al. A multi-factor study of salt expansion of sulphate salty soil[J]. Journal of Glaciology and Geocryology, 1996, 18(2): 170-177. (in Chinese))
[3] 王俊臣, 李劲松, 王常明. 硫酸盐渍土单次盐胀和冻胀发育规律研究[J]. 吉林大学学报(地球科学版), 2006, 36(3): 410-416. (WANG Jun-chen, LI Jin-song, WANG Chang-ming. A study on single-cycle salt and frost heaving of sulfat esaline soil[J]. Journal of Jilin University (Earth Science Edition), 2006, 36(3): 410-416. (in Chinese))
[4] 顾强康, 吴爱红, 李宁. 硫酸盐渍土的盐胀特性试验研究[J]. 西安理工大学学报2009, 25(3): 283-287. (GU Qiang-kang, WU Ai-hong, LI Ning. The experiment study of salt heaving behaviors of sulphate saline soil[J]. Journal of Xi’an University of Technology, 2009, 25(3): 283-287. (in Chinese))
[5] 炳慧, 马巍. 盐渍土冻结温度的试验研究[J]. 冰川冻土, 2011, 33(5): 1106-1113. (BING Hui, MA Wei. Experimental study on freezing point of saline soil[J]. Journal of Glaciology and Geocryology, 2011, 33(5): 1106-1113. (in Chinese))
[6] 陈肖柏, 邱国庆, 王雅卿, 等. 降温时之盐分重分布及盐胀试验研究[J]. 冰川冻土,1989, 11(3): 231-238. (CHEN Xiao-bai, QIU Guo-qing, WANG Ya-qing, et al. Salt redistribution and heave of saline soil during cooling[J]. Journal of Glaciology and Geocryology, 1989, 11(3): 231-238. (in Chinese))
[7] 徐学祖, 王家澄, 张立新. 冻土物理学[M]. 北京: 科学出版社, 2001. (XU Xue-zu, WANG Jia-cheng, ZHANG Li-xin. Frozen soil phasics[M]. Beijing: Science Press, 2001. (in Chinese))
[8] 徐学祖, 王家澄, 张立新, 等. 土体冻胀和盐胀机理[M]. 北京: 科学出版社, 1995. (XU Xue-zu, WANG Jia-cheng, ZHANG Li-xin, et al. Mechanism of frost heaving and salt expansion of soil[M]. Beijing: Science Press, 1995. (in Chinese))
[9] 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 Jian-hong, LIU Jian-kun, et al. Variation characteristics of hydrothermal state and migration laws of water and salt in Qarhan Salt Lake region[J]. Chinese Journal Geotechnical Engineering, 2012, 34(7): 1344-1348. (in Chinese))
[10] 徐攸在. 盐渍土地基[M]. 北京: 中国建筑工业出版社, 1993. (XU You-zai. Foudation of saline soil[M]. Beijing: China Architecture & Building Press, 1993. (in chinese))
[11] 邓友生, 周成林. 硫酸钠溶液的盐胀与冻胀[J]. 冰川冻土, 2009, 31(5): 920-924. (DENG You-sheng, ZHOU Cheng-lin. Salt expansion and frost heave of sodium sulphate solution[J]. Journal of Glaciology and Geocryology, 2009, 31(5): 920-924. (in Chinese))
[12] 张莎莎, 杨晓华, 张秋美. 天然粗颗粒盐渍土大型路堤模型试验研究[J]. 岩土工程学报, 2012, 34(5): 842-847. (ZHANG Sha-sha, YANG Xiao-hua, ZHANG Qiu-mei. Large-scale model tests on embankment of crude coarse grained saline soil[J]. Chinese Journal Geotechnical Engineering, 2012, 34(5): 842-847. (in Chinese))