Deformation Prediction and Deformation Characteristics of Multilayers of Mucky Clay under Artificial Freezing Condition
- 5 Downloads
Artificial ground freezing method, is a popular technique applied in coastal soft soil area for underground engineering construction. This method can bring some side effects, like frost heave and thaw settlement, due to the water migration in soil during freezing-thawing process. A self-designed one-dimensional freezing apparatus is used to study the deformation performance of the reconstituted soft clay from Shanghai 4th layer during freezing-thawing process. Test results show that total frost heave amount increases with decreasing boundary freezing temperature while it remains with the variation of initial water content in the test. The deformation of multilayers during freezing process reveals compression phenomenon due to the water migration in the soil samples. The compression area is the main part contributed to thaw settlement. Besides, a prediction model is established with void ratio as a variable to connect frost-heave model with thaw-settlement model. FDM (Finite Difference Method) method is used for computation through compiling code in MATLAB software. Comparison shows that compression phenomenon is necessary to be considered when calculating thaw settlement. This study provides valuable reference to the deformation control of soil in the construction of artificial ground freezing.
Keywordsmucky clay artificial freezing soil water migration frost heave thaw settlement
Unable to display preview. Download preview PDF.
- Anderson, D. M. and Tice, A. R. (1973). “The unfrozen interfacial phase in frozen soil water systems.” Physical Aspects of Soil Water and Salts in Ecosystems, A. Hades, D. Swartzendruber, P. E. Rijtema, M. Fuchs, B. Yaron, Eds., Springer Berlin Heidelberg, Berlin, Heidelberg, Germany, pp. 107–124, DOI: https://doi.org/10.1007/978-3-642-65523-4_12.CrossRefGoogle Scholar
- Foriero, A. and Ladanyi, B. (1995). “FEM assessment of large-strain thaw consolidation.” Journal of Geotechnical Engineering, Vol. 121, No. 2, pp. 126–138, DOI: https://doi.org/10.1061/(ASCE)0733-9410(1995)121:2(126).CrossRefGoogle Scholar
- Schiffman, R. L. and Cargill, K. W. (1981). “Finite strain consolidation of sedimenting clay deposits.” Proceedings of the 10th International Conference on Soil Mechanics and Foundation Engineering, Stockholm, Vol. 1, pp. 239–242.Google Scholar
- Tang, Y. Q., Hong, J., Yang, P., Wang, J. X., and Hu, X. D. (2009). “Frost-heaving behaviors of mucky clay by artificial horizontal freezing method.” Chinese Journal of Geotechnical Engineering, Vol. 31, No. 5, pp. 772–776, DOI: https://doi.org/10.3321/j.issn:1000-4548.2009.05.021.Google Scholar
- Wen, Z., Feng, W., Deng, Y., Wang, D., Fan, Z., and Zhou, C. (2012). “Experimental study on unfrozen water content and soil matric potential of Qinghai-Tibetan silty clay.” Environmental Earth Sciences, Vol. 66, No. 5, pp. 1467–1476, DOI: https://doi.org/10.1007/s12665-011-1386-0.CrossRefGoogle Scholar
- Xie, X., Zhu, X., Xie, K., and Pan, Q. (1997). “New developments of one-dimensional large strain consolidation theories.” Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering, Vol. 19, No. 4, pp. 30–38, DOI: https://doi.org/10.3321/j.issn:1000-4548.1997.04.007.Google Scholar
- Xu, X. and Deng, Y. (1991). Experimental study on water migration in freezing and frozen soils, Science Press, Beijing, China, pp. 32–35.Google Scholar
- Xu, X. Z., Wang, J. C., and zhang, L. X. (2001). Physics of frozen soil, Science Press, Beijing, China, pp. 36–68.Google Scholar
- Zhang, T. and Yang, P. (2013). “Effects of unilateralist freezing on the moisture migration of soil.” Journal of Nanjing Forestry University, Vol. 37, No. 1, pp. 117–121, DOI: https://doi.org/10.3969/j.jssn.1000-2006.2013.01.021.MathSciNetGoogle Scholar
- Zhou, J. (2015). Thaw settlement mechanism and dynamic deformation of soft clay surrounding subway tunnel after artificial ground freezing, PhD Thesis, Tongji University, Shanghai, China.Google Scholar