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http://dx.doi.org/10.12989/gae.2018.15.4.997

Experimental study on freezing point of saline soft clay after freeze-thaw cycling  

Wang, Songhe (Institute of Geotechnical Engineering, Xi'an University of Technology)
Wang, Qinze (Institute of Geotechnical Engineering, Xi'an University of Technology)
Qi, Jilin (College of Civil and Transportation Engineering, Beijing University of Civil Engineering and Architecture)
Liu, Fengyin (Institute of Geotechnical Engineering, Xi'an University of Technology)
Publication Information
Geomechanics and Engineering / v.15, no.4, 2018 , pp. 997-1004 More about this Journal
Abstract
The brine leakage is a tough problem in artificial freezing engineering. This paper takes the common soft clay in Wujiang District as the study object, and calcium chloride solutions with six salinity levels were considered. The 'classic' cooling curve method was employed to measure the freezing point of specimens after freeze-thaw. Results indicate that four characteristic stages can be observed including supercooling, abrupt transition, equilibrium and continual freezing, strongly dependent on the variation of unfrozen water content. Two characteristic points were found from the cooling curves, i.e., freezing point and initial crystallization temperature. A critical value for the former exists at which the increment lowers. The higher the saline content approximately linearly, lower the freezing point. In the initial five cycles, the freezing point increases and then stabilizes. Besides, the degree of supercooling was calculated and its correlations with water, salt and freeze-thaw cycles were noted. Finally, an empirical equation was proposed for the relationship of freezing point and three main factors, i.e., water content, saline content and freeze-thaw cycles. Comparison of calculated and measured data proves that it is reliable and may provide guidance for the design and numerical analysis in frozen soil engineering.
Keywords
freezing point; freeze and thaw; frozen soils; salinity; supercooling degree;
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Times Cited By KSCI : 6  (Citation Analysis)
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1 Suzuki, S. (2004), "Verification of freezing point depression method for measuring matric potential of soil water", Soil Sci. Plant Nutr., 50(8), 1277-1280.   DOI
2 Tang, Y., Li, J., Wan, P. and Yang, P. (2014), "Resilient and plastic strain behavior of freezing-thawing mucky clay under subway loading in Shanghai", Nat. Hazards, 72(2), 771-787.   DOI
3 Tang, Y., Zhou, J., Hong, J., Yang, P. and Wang, J.X. (2012), "Quantitative analysis of the microstructure of Shanghai muddy clay before and after freezing", Bull. Eng. Geol. Environ., 71(2), 309-316.   DOI
4 Teltayev, B.B. and Aitbayev, K. (2015), "Modeling of transient temperature distribution in multilayer asphalt pavement", Geomech. Eng., 8(2), 133-152.   DOI
5 Tengborg, P. and Struk, R. (2016), "Development of the use of underground space in Sweden", Tunn. Undergr. Sp. Technol., 55, 339-341.   DOI
6 Vitel, M., Rouabhi, A., Tijani, M. and Guerin, F. (2016), "Thermohydraulic modeling of artificial ground freezing: Application to an underground mine in fractured sandstone", Comput. Geotech., 75, 80-92.   DOI
7 Wan, X., Lai, Y., Wang, C. (2015), "Experimental study on the freezing temperatures of saline silty soils", Permafrost Periglac., 26(2), 175-187.   DOI
8 Wang, D., Ma, W., Chang, X. and Wang, A. (2005), "Study on the resistance to deformation of artificially frozen soil in deep alluvium", Cold Reg. Sci. Technol., 42(3), 194-200.   DOI
9 Wang, S., Qi, J., Yu, F. and Liu, F. (2016), "A novel modeling of settlement of foundations in permafrost regions", Geomech. Eng., 10(2), 225-245.   DOI
10 Watanabe, K. and Wake, T. (2008), "Hydraulic conductivity in frozen unsaturated soil", Proceedings of the 9th International Conference on Permafrost, Fairbanks, Alaska, U.S.A., June-July.
11 Yazdani, H. and Toufigh, M.M. (2012), "Nonlinear consolidation of soft clays subjected to cyclic loading-Part II: Verification and application", Geomech. Eng., 4(4), 243-249.   DOI
12 Wu, M., Tan, X., Huang, J., Wu, J. and Jansson, P.E. (2015), "Solute and water effects on soil freezing characteristics based on laboratory experiments", Cold Reg. Sci. Technol., 115, 22-29.   DOI
13 Yang, P., Ke, J.M., Wang, J.G., Chow, Y.K. and Zhu, F.B. (2006), "Numerical simulation of frost heave with coupled water freezing, temperature and stress fields in tunnel excavation", Comput. Geotech., 33(6-7), 330-340.   DOI
14 Yao, X.L., Qi, J.L. and Ma, W. (2009), "Influence of freeze-thaw on the stored free energy in soils", Cold Reg. Sci. Technol., 56(2-3), 115-119.   DOI
15 Yildiz, A. and Uysal, F. (2015), "Numerical modelling of Haarajoki test embankment on soft clays with and without PVDs", Geomech. Eng., 8(5), 707-726.   DOI
16 Grechishchev, S.E., Instanes, A., Sheshin, J.B., Pavlv, A.V. and Grechishcheva, O.V. (2001), "Laboratory investigation of the freezing point of oil-polluted soils", Cold Reg. Sci. Technol., 32(2-3), 183-189.   DOI
17 Bing, H. and Ma, W. (2011), "Laboratory investigation of the freezing point of saline soil", Cold Reg. Sci. Technol., 67(1), 79-88.   DOI
18 Chen, X. (1996), "A "time-space" related design method of freezing wall", J. Coal Sci. Eng., 2(2), 63-66.
19 Fattah, M.Y., Al-Saidi, A.A. and Jaber, M.M. (2015), "Improvement of bearing capacity of footing on soft clay grouted with lime-silica fume mix", Geomech. Eng., 8(1), 113-132.   DOI
20 Guan, H., Wang, D., Ma, W., Mu, Y., Wen, Z., Gu, T. and Wang, Y. (2014a), "Study on the freezing characteristics of silty clay under high loading conditions", Cold Reg. Sci. Technol., 110, 26-31.
21 Guan, H. (2014b), "Investigation on freezing characteristics of Lanzhou loess under high loading conditions", Ph.D. Disertation, Chinese Academy of Sciences, Beijing, China (in Chinese).
22 Karstunen, M., Wiltafsky, C., Krenn, H., Scharinger, F. and Schweiger, H.F. (2006), "Modelling the behaviour of an embankment on soft clay with different constitutive models", J. Numer. Anal. Meth. Geomech., 30(10), 953-982.   DOI
23 Kozlowski, T. (2004), "Soil freezing point as obtained on melting", Cold Reg. Sci. Technol., 38, 93-101.   DOI
24 Kozlowski, T. (2009), "Some factors affecting supercooling and the equilibrium freezing point in soil-water system", Cold Reg. Sci. Technol., 59(1), 25-33.   DOI
25 Marwan, A., Zhou, M., Abdelrehim, M.Z. and Meschke, G. (2016), "Optimization of artificial ground freezing in tunneling in the presence of seepage flow", Comput. Geotech., 75, 112-125.   DOI
26 Kozlowski, T. (2016), "A simple method of obtaining the soil freezing point depression, the unfrozen water content and the pore size distribution curves from the DSC peak maximum temperature", Cold Reg. Sci. Technol., 122, 18-25.   DOI
27 Lu, J., Zhang, M., Zhang, X. and Yan, Z. (2017), "Experimental study on unfrozen water content and the freezing temperature during freezing and thawing processes", Chin. J. Rock Mech. Eng., 36(7), 1803-1812 (in Chinese).
28 Ma, W., Fang, L. and Qi, J. (2011), "Methodology of study on freeze-thaw cycling induced changes in engineering properties of soils", Proceedings of the 9th International Symposium on Permafrost Engineering, Mirny, Russia, June-July.
29 Nelson, P.P. (2016), "A framework for the future of urban underground engineering", Tunn. Undergr. Sp. Technol., 55, 32-39.   DOI
30 Parameswaran, V.R. and Mackay, J.R. (1983), "Field measurements of electrical freezing potential in permafrost areas", Proceedings of the 4th International Conference on Permafrost, Fairbanks, Alaska, U.S.A., July.
31 Park, D. (2016), "Rate of softening and sensitivity for weakly cemented sensitive clays", Geomech. Eng., 10(6), 827-836.   DOI
32 Qi, J.L., Pieter, A.V. and Cheng, G.D. (2006), "A review of the influence of freeze-thaw cycles on soil geotechnical properties", Permafrost Periglac., 17(3), 245-252.   DOI
33 Sinitsyn, A.O. and Loset, S. (2010), "Equivalent cohesion of frozen saline sandy loams at temperatures close to their freezing point", Soil Mech. Found. Eng., 47(2), 68-73.   DOI