基于超微型贯入试验的黏性土干燥过程中结构强度演化规律研究

王德银 唐朝生 李建 施斌

王德银, 唐朝生, 李建, 施斌. 2014: 基于超微型贯入试验的黏性土干燥过程中结构强度演化规律研究. 工程地质学报, 22(5): 818-823. doi: 10.13544/j.cnki.jeg.2014.05.07
引用本文: 王德银, 唐朝生, 李建, 施斌. 2014: 基于超微型贯入试验的黏性土干燥过程中结构强度演化规律研究. 工程地质学报, 22(5): 818-823. doi: 10.13544/j.cnki.jeg.2014.05.07
WANG Deyin, TANG Chaosheng, LI Jian, SHI Bin. 2014: SUPER MINIATURE PENETRATION TEST ON STRUCTURAL STRENGTH OF CLAYEY SOIL DURING EVAPORATION. JOURNAL OF ENGINEERING GEOLOGY, 22(5): 818-823. doi: 10.13544/j.cnki.jeg.2014.05.07
Citation: WANG Deyin, TANG Chaosheng, LI Jian, SHI Bin. 2014: SUPER MINIATURE PENETRATION TEST ON STRUCTURAL STRENGTH OF CLAYEY SOIL DURING EVAPORATION. JOURNAL OF ENGINEERING GEOLOGY, 22(5): 818-823. doi: 10.13544/j.cnki.jeg.2014.05.07

基于超微型贯入试验的黏性土干燥过程中结构强度演化规律研究

doi: 10.13544/j.cnki.jeg.2014.05.07
基金项目: 

优秀青年科学基金项目(41322019),国家自然科学基金重点项目(41230636),江苏省自然科学基金项目(BK2011339)资助

详细信息
    作者简介:

    王德银,男,硕士研究生,工程地质专业. Email:wangdeyin_nju@163.com

    通讯作者:

    唐朝生(1980- ),男,博士,副教授,硕士生导师,主要从事工程地质和环境岩土工程方面的研究. Email: tangchaosheng@nju.edu.cn

  • 中图分类号: P642.3

SUPER MINIATURE PENETRATION TEST ON STRUCTURAL STRENGTH OF CLAYEY SOIL DURING EVAPORATION

  • 摘要: 研究土体结构强度对了解土体开裂破坏过程和预防相关工程地质问题有重要意义。以南京地区下蜀土为对象,采用超微型贯入试验方法,分析了试样在干燥过程中的结构强度演化特征。结果表明:所采用的超微型贯入试验方法为定量研究土体在干燥过程中结构强度的演化规律提供了可行的途径,该方法具有操作简单、精度高和含水率适应范围大等优点; 在干燥过程中,当试样处于高含水率阶段时(w24.27%),剖面上的结构强度基本保持一致,空间差异性较小; 在低含水率阶段(w24.27%),试样结构强度空间差异性显著增强,随深度的增加,结构强度呈递减趋势并逐渐趋于稳定; 总体上,土体的结构强度在干燥过程中随平均含水率的减小呈指数递增趋势,这主要是由于土体水分蒸发导致吸力增加,土颗粒之间的作用力增强。此外,由于土体发生收缩变形,土体孔隙比减小,土颗粒间联接点增加,也会对结构强度产生贡献。
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出版历程
  • 收稿日期:  2014-04-20
  • 修回日期:  2014-07-01
  • 刊出日期:  2014-10-25

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