Volume 23 Issue 1
Feb.  2015
Turn off MathJax
Article Contents
ZHANG Hui, WANG Tiehang, LUO Yang. 2015: EXPERIMENTAL STUDY ON MOISTURE MIGRATION OF UNSATURATED LOESS UNDER FREEZING EFFECT. JOURNAL OF ENGINEERING GEOLOGY, 23(1): 72-77. doi: 10.13544/j.cnki.jeg.2015.01.011
Citation: ZHANG Hui, WANG Tiehang, LUO Yang. 2015: EXPERIMENTAL STUDY ON MOISTURE MIGRATION OF UNSATURATED LOESS UNDER FREEZING EFFECT. JOURNAL OF ENGINEERING GEOLOGY, 23(1): 72-77. doi: 10.13544/j.cnki.jeg.2015.01.011

EXPERIMENTAL STUDY ON MOISTURE MIGRATION OF UNSATURATED LOESS UNDER FREEZING EFFECT

doi: 10.13544/j.cnki.jeg.2015.01.011
Funds:

  • Received Date: 2013-07-12
  • Rev Recd Date: 2014-05-20
  • Publish Date: 2015-02-25
  • This paper carries the moisture migration tests of unsaturated loess with the large size sample under freezing effect. It examines the influence of density, water content, freezing temperatures and freezing way on moisture migration of unsaturated loess. Results show that the soil sample temperature change under freezing process is divided into three stages: rapid cooling stage, the slow cooling stage, and stable stage. For higher dry density, the increase of water content at the frozen front is greater, but the increase of water migration of moving to the frozen part is lower. For a certain dry density, if the initial water content is higher, the amount of moisture migration is greater. And the increase of water content of the frozen front is also the greater. From the cold end to the warm end in the unfrozen area, water content increases at first, then decreases. And, this phenomenon is the more evident with lower initial water content. This phenomenon is the combined effect of the freezing interface suction force, temperature gradient and the matric suction gradient. The water content distribution and the total amount of moisture migration in frozen area are affected directly by the freezing way.
  • loading
  • Dong C H, Zhao X Q. 2013. Analysis on subgrade deformation features and influence factors in permafrost regions on Qinghai Tibet Railway[J]. Railway Standard Design, (6): 5~8.

    Gilpin R R. 1985. A model for the prediction of ice tensing and frost heave in soils[J]. Water Resources Research, 16 (5): 918~930.

    Konrad J M, Morgenstern N R. 1980. A mechanistic theory of ice lens formation in finegrained soils[J]. Canadian Geotechnical Journal, 17 (4): 473~486.

    Li P, Li T L, Wang A D, et al. 2013. Insitu test research on regularities of water migration in loess[J]. Rock and Soil Mechanics, 34 (5): 1331~1339.

    Ma S X. 2012. Experimental study of freezing-thawing to spalling of loess slope[Thesis of Master][D]. Xi'an : Xi'an University of Science and Technology.

    Mao X S, Hou Z J, Kong L K. 2010. Dynamic observation and analysis of moisture migration for windblow sand in open system during frost[J]. Chinese Journal of Rock Mechanics and Engineering, 29 (1): 202~208.

    Nassar I N, Horton R, Globus A M. 1997. Thermally induced water transfer in stalinized unsaturated soil[J]. Soil Science Society of American Journal, 61 (6): 1293~1298.

    Prat M. 1986. Analysis of experiments of moisture migration caused by temperature differences in unsaturated porous medium by means of twodimensional numerical simulation[J]. International Journal of Heat and Mass Transfer, 29 (7): 1033~1039.

    Shoop S A, Bigl S R. 1997. Moisture migration during freeze and thaw of unsaturated soils: Modeling and large scale experiments[J]. Cold Regions Science and Technology, 25 (1): 33~45.

    Wang T H, Su L J. 2010. Experimental study on moisture migration in unsaturated loess under effect of temperature[J]. Journal of Cold Regions Engineering, 24 (3): 77~86.

    Xu J, Niu F J, Niu Y H, et al. 2013. Analysis on the moisture migration of subgrade soil under effect of temperature gradient. Journal of Chongqing University, 36 (4): 152~158.

    Zhao G, Tao X X, Liu B. 2009. Experimental study on water migration in undisturbed soil during freezing and thawing process[J]. Chinese Journal of Geotechnical Engineering, 31 (12): 1952~1957.

    董昶宏, 赵相卿. 2013. 青藏铁路多年冻土区路基变形特征及影响因素分析[J]. 铁道标准设计, (6) : 5~8.

    李萍, 李同录, 王阿丹,等. 2013. 黄土中水分迁移规律现场试验研究[J]. 岩土力学, 34 (5): 1331~1339.

    马世雄. 2012. 冻融作用对黄土边坡剥落影响的试验研究[硕士学位论文][D]. 西安: 西安科技大学.

    毛雪松, 侯中杰, 孔令坤. 2010. 冻结条件下开放体系风积砂水分迁移的动态观测及分析[J]. 岩石力学与工程学报, 29 (1):202~208.

    许建, 牛富俊, 牛永红,等. 2013. 冻结过程路基土体水分迁移特征分析[J]. 重庆大学学报, 36 (4): 150~158.

    赵刚, 陶夏新,刘兵,等. 2009. 原状土冻融过程中水分迁移试验研究[J]. 岩土工程学报, 31 (12): 1952~1957.
  • 加载中

Catalog

    通讯作者: 陈斌, bchen63@163.com
    • 1. 

      沈阳化工大学材料科学与工程学院 沈阳 110142

    1. 本站搜索
    2. 百度学术搜索
    3. 万方数据库搜索
    4. CNKI搜索
    Article views (2617) PDF downloads(560) Cited by()
    Proportional views
    Related

    /

    DownLoad:  Full-Size Img  PowerPoint