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非饱和土湿吸力与含水率的定量关系研究

张鹏程, 汤连生, 邓钟尉, 姜力群

张鹏程, 汤连生, 邓钟尉, 姜力群. 非饱和土湿吸力与含水率的定量关系研究[J]. 岩土工程学报, 2012, 34(8): 1453-1457.
引用本文: 张鹏程, 汤连生, 邓钟尉, 姜力群. 非饱和土湿吸力与含水率的定量关系研究[J]. 岩土工程学报, 2012, 34(8): 1453-1457.
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ZHANG Peng-cheng, TANG Lian-sheng, DENG Zhong-wei, JIANG Li-qun. Quantitative relationship between wet suction and water content of unsaturated soils[J]. Chinese Journal of Geotechnical Engineering, 2012, 34(8): 1453-1457.
Citation: ZHANG Peng-cheng, TANG Lian-sheng, DENG Zhong-wei, JIANG Li-qun. Quantitative relationship between wet suction and water content of unsaturated soils[J]. Chinese Journal of Geotechnical Engineering, 2012, 34(8): 1453-1457.
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非饱和土湿吸力与含水率的定量关系研究  English Version

  • 1.中山大学应用力学与工程系，广东 广州 510275； 2.广州市城市规划勘测设计研究院，广东 广州 510060；3.中山大学地球科学系，广东 广州 510275

基金项目: 国家自然科学基金项目（40872205）；全国高等学校博士学<br />科专项科研基金项目（20070558032）；广东省科技计划项目（2008B030303009）
详细信息
    作者简介:

    张鹏程(1975– )，男，博士研究生，主要从事岩土力学、非饱和土等方面的研究。

  • 中图分类号: TU411

Quantitative relationship between wet suction and water content of unsaturated soils

  • (1. Department of Earth Sciences, Sun Yat-Sen University, Guangzhou 510275, China; 2. Guangzhou Urban Planning Survey and Design Institute, Guangzhou 510060, China; 3. Department of Applied Mechanics and Engineering, Sun Yat-Sen University, Guangzhou 510275, China)

摘要

    摘要
  • 摘要: 以立方松散堆积方式为例，从理论上推导并给出了湿吸力与非饱和土含水率的定量关系表达式，开展了不同含水率状态下重塑细粒砂性土的吸力测试，对试验结果进行了曲线拟合和分析，理论计算和试验拟合结果均表明：对于特定的非饱和土，湿吸力随含水率先增大而后减小，即存在确定的界限含水率。这与“在一定的土体含水率变化范围内，非饱和土，尤其是非饱和砂性土的强度随含水率的增加而先增大后减小”的事实完全相符，这再次证明了湿吸力，而非基质吸力，才是非饱和土有效应力的重要组成部分。
    Abstract: Based on the example of cubic loose accumulation, a quantitative relation expression is deduced theoretically between wet suction and water content of unsaturated soils. The suction tests on remodeling fine grain sand soil with different water content are carried out, and a curve-fitting of the test results is analyzed. Theoretical calculations and experimental results show that for specific unsaturated soils, with the increase of the water content, the suction wet increases first and then decreases, which is the same as that when there is a certain boundary of water content. This agrees with the fact that in a certain range, the strength of the unsaturated soils, especially the unsaturated sand soils, increases first and then decreases with the increase of the water content. It indicates that the wet suction, instead of matrix suction, is the important part of effective stress.
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    • 参考文献(8)
  • [1] 汤连生, 王思敬. 湿吸力及非饱和土的有效应力原理探讨[J]. 岩土工程学报, 2000, 22(1): 83–88. (TANG Lian-sheng, WANG Si-jing. Absorbed suctionand principle of effective stress in unsaturated soils[J]. Chinese Journal of Geotechnical Engineering, 2000, 22(1): 83–88. (in Chinese))
    [2] 汤连生. 从粒间吸力特性再认识非饱和土抗剪强度理论[J].岩土工程学报, 2001, 23(4): 412–417. (TANG Lian-sheng. New suggestion on shear strength in unsaturated soil based on suction between grains[J]. Chinese Journal of Geotechnical Engineering, 2001, 23(4): 412–417. (in Chinese))
    [3] 汤连生, 颜 波, 张鹏程, 等. 非饱和土中有效应力及有关概念的解说与辨析[J]. 岩土工程学报, 2006, 28(2): 216–220. (TANG Lian-sheng, YAN Bo, ZHANG Peng-cheng, et al. Definition and exploration for effective stress and related conceptionin unsaturated soil[J]. Chinese Journal of Geotechnical Engineering, 2006, 28(2): 216–220. (in Chinese))
    [4] 谢定义, 冯志焱. 对非饱和土有效应力研究中若干基本观点的思辨[J]. 岩土工程学报, 2006, 28(2): 170–173. (XIE Ding-yi, FENG Zhi-yan. Consideration of some fundamental viewpoints in studying effective stress of unsaturated soils[J]. Chinese Journal of Geotechnical Engineering, 2006, 28(2): 170–173. (in Chinese))
    [5] 陈敬虞, FREDLAUD. 非饱和土抗剪强度理论的研究进展[J]. 岩土力学, 2003, 24(增刊): 655–660. (CHEN Jing-yu, FREDLAUD. Advance in research on shear stre-ngth of unsaturated soils[J]. Rock and Soil Mechanics, 2003, 24(S): 655–660. (in Chinese))
    [6] 杨 庆, 张传庆, 栾茂田. 基于微结构定量分析的非饱和土广义有效应力原理[J]. 大连理工大学学报, 2004, 44(7): 556–559. (YANG Qing, ZHANG Chuan-qing, LUAN Mao-tian. Generalized effective stress principle of unsaturated soils based on quantitative analysis of soil microstructure[J]. Journal of Dalian University of Technology, 2004, 44(7): 556–559. (in Chinese))
    [7] 熊承仁, 刘宝琛, 张家生. 重塑黏性土的基质吸力与土水分及密度状态的关系[J]. 岩石力学与工程学报, 2005, 24(2): 321–327. (XIONG Cheng-ren, LIU Bao-chen, ZHANG Jia-sheng. Relation of matric suction with moisture state and density state of remolded cohesive soil[J]. Chinese Journal of Rock Mechanics and Engineering, 2005, 24(2): 321–327. (in Chinese))
    [8] 姚海林. 关于基质吸力及几个相关问题的思考[J]. 岩土力学, 2005, 26(1): 67–70. (YAO Hai-lin. Considerations of several problems about matric suction[J]. Rock and Soil Mechanics, 2005, 26(1): 67–70. (in Chinese))
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出版历程
  • 收稿日期:  2011-06-27
  • 发布日期:  2012-08-19

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