冻结作用下非饱和黄土水分迁移试验研究

张辉 王铁行 罗扬

张辉, 王铁行, 罗扬. 2015: 冻结作用下非饱和黄土水分迁移试验研究. 工程地质学报, 23(1): 72-77. doi: 10.13544/j.cnki.jeg.2015.01.011
引用本文: 张辉, 王铁行, 罗扬. 2015: 冻结作用下非饱和黄土水分迁移试验研究. 工程地质学报, 23(1): 72-77. doi: 10.13544/j.cnki.jeg.2015.01.011
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

冻结作用下非饱和黄土水分迁移试验研究

doi: 10.13544/j.cnki.jeg.2015.01.011
基金项目: 

国家自然科学基金项目(51078309,51208409),陕西省教育厅专项科研计划项目(12JK0914)资助

详细信息
    作者简介:

    张辉(1986-),男,博士,讲师,从事黄土及冻土工程理论及实践研究. Email:0107zhanghui@163.com

  • 中图分类号: TU445

EXPERIMENTAL STUDY ON MOISTURE MIGRATION OF UNSATURATED LOESS UNDER FREEZING EFFECT

  • 摘要: 通过室内大尺寸非饱和黄土冻结作用下水分迁移试验,开展了土体密度、含水量、冻结温度、冻结方式对非饱和黄土水分迁移影响的研究.试验结果表明:冻结过程中土样温度变化分为3个阶段:急剧降温阶段,缓慢降温阶段,稳定阶段; 干密度越大,稳定冻结锋面的水分迁移量越大,但冻结区的整体水分增量越小; 初始含水量越大,水分迁移量越大,并且在冻结锋面处含水量增幅越大; 在未冻结区,从邻近冻结锋面到暖端,含水量先增大后减小,初始含水量越小,这种现象越明显.此现象是冻结界面抽吸力、温度梯度和基质吸力梯度共同作用的结果.冻结方式直接影响已冻结区的含水量分布和水分迁移总量.
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出版历程
  • 收稿日期:  2013-07-12
  • 修回日期:  2014-05-20
  • 刊出日期:  2015-02-25

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