长期冻融循环引起黄土强度劣化的试验研究

董晓宏 张爱军 连江波 郭敏霞

董晓宏, 张爱军, 连江波, 郭敏霞. 2010: 长期冻融循环引起黄土强度劣化的试验研究. 工程地质学报, 18(6): 887-893.
引用本文: 董晓宏, 张爱军, 连江波, 郭敏霞. 2010: 长期冻融循环引起黄土强度劣化的试验研究. 工程地质学报, 18(6): 887-893.
DONG Xiaohong, ZHANG Aijun, LIAN Jiangbo, GUO Minxia. 2010: LABORATORY STUDY ON SHEAR STRENGTH DETERIORATION OF LOESS WITH LONG-TERM FREEZING-THAWING CYCLES. JOURNAL OF ENGINEERING GEOLOGY, 18(6): 887-893.
Citation: DONG Xiaohong, ZHANG Aijun, LIAN Jiangbo, GUO Minxia. 2010: LABORATORY STUDY ON SHEAR STRENGTH DETERIORATION OF LOESS WITH LONG-TERM FREEZING-THAWING CYCLES. JOURNAL OF ENGINEERING GEOLOGY, 18(6): 887-893.

长期冻融循环引起黄土强度劣化的试验研究

基金项目: 

国家自然科学基金项目(50779058),冻土工程国家重点实验室开放基金项目(SKLFSE200803).

详细信息
    作者简介:

    董晓宏,主要从事岩土力学与工程方面的研究工作.Email: wwwdxh0529@126.com

    通讯作者:

    张爱军,主要从事非饱和特殊土理论与岩土工程数值计算工作.Email:zaj@nwsuaf.edu.cn

  • 中图分类号: TU411.7

LABORATORY STUDY ON SHEAR STRENGTH DETERIORATION OF LOESS WITH LONG-TERM FREEZING-THAWING CYCLES

  • 摘要: 以陕西杨凌地区黄土为研究对象,进行了不同含水率、不同干密度的黄土在不同冻融循环次数作用下的直剪试验,探索出进行黄土反复冻融循环试验的方法和控制标准,探讨了封闭系统下黄土在反复冻融循环作用下的抗剪强度劣化特性规律。试验结果表明:黄土在反复冻融循环作用下,表面破坏比较严重; 随着冻融次数的增加,黄土的黏聚力先减小后增大,最低值发生在10次冻融循环之内; 内摩擦角基本不变; 反复冻融循环作用在3~5次对黄土强度有较大的影响,会导致黄土强度的劣化现象发生,但长期冻融作用则会主要体现在对黄土表面的变形破坏等其他方面。
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出版历程
  • 收稿日期:  2009-11-19
  • 修回日期:  2010-01-25
  • 刊出日期:  2010-12-25

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