基质吸力对非饱和重塑黄土抗剪强度的贡献

闫亚景 文宝萍 计博勋

闫亚景, 文宝萍, 计博勋. 2011: 基质吸力对非饱和重塑黄土抗剪强度的贡献. 工程地质学报, 19(6): 865-874.
引用本文: 闫亚景, 文宝萍, 计博勋. 2011: 基质吸力对非饱和重塑黄土抗剪强度的贡献. 工程地质学报, 19(6): 865-874.
YAN Yajing, WEN Baoping, JI Boxun. 2011: CONTRIBUTION OF MATRIC SUCTION TO SHEAR STRENGTH OF UNSATURATED REMOULDED LOESS SOILS. JOURNAL OF ENGINEERING GEOLOGY, 19(6): 865-874.
Citation: YAN Yajing, WEN Baoping, JI Boxun. 2011: CONTRIBUTION OF MATRIC SUCTION TO SHEAR STRENGTH OF UNSATURATED REMOULDED LOESS SOILS. JOURNAL OF ENGINEERING GEOLOGY, 19(6): 865-874.

基质吸力对非饱和重塑黄土抗剪强度的贡献

基金项目: 

国家自然科学基金项目(40872182)资助

详细信息
    作者简介:

    闫亚景,主要从事岩土力学和斜坡稳定性研究.Email: yajinghappy123@163.com

  • 中图分类号: P642.131

CONTRIBUTION OF MATRIC SUCTION TO SHEAR STRENGTH OF UNSATURATED REMOULDED LOESS SOILS

  • 摘要: 非饱和土抗剪强度随饱和度降低、基质吸力增大而提高。然而,不同类型非饱和土中,基质吸力对抗剪强度的贡献却显著不同。本文通过室内试验,探讨了基质吸力对非饱和重塑黄土抗剪强度贡献的基本特征。研究结果表明,非饱和重塑黄土抗剪强度随着基质吸力的增大,表现为非线性的和明显的4个阶段性增、降和逐渐稳定特征,且分段特征值与土-水特征曲线完全一致。基质吸力5kPa、60kPa、170kPa分别是这4个阶段的临界值。其中,当基质吸力60kPa时,非饱和重塑黄土抗剪强度出现峰值。非饱和黄土表观黏聚力随基质吸力变化特点与抗剪强度基本一致,但表观内摩擦角呈现阶段性增大趋势。表观黏聚力对基质吸力的敏感程度显著大于表观内摩擦角。非饱和重塑黄土抗剪强度变化特点显示其抗剪强度参数b值为一个非常量数值。
  • [1] Donald IB.Shear strength measurements in unsaturated,non-cohesive soils with negative pore pressure.Proceedings of the 2nd Australia and New Zealand Conference on Soil Mechanics and Foundation Engineering .1956, 200~205.

    [2] Bishop AW,Alpan Ⅰ,Blight GE.Factors controlling the shear strength of partly saturated cohesive soils .ASCE Research Conference on Shear Strength of Cohensive Soils .Boulder: University of Colorado, 1960, 503~532.

    [3] Fredlund DG,Morgenstern NR,Widger RA.The shear strength of unsaturated soils[J].Canadian Geotechnical Journal, 1978, 15 : 313~321.

    [4] Gan JKM,Fredlund DG,Rahardjo H.Determination of the shear strength parameters of an unsaturated soil using the direct shear test[J].Canadian Geotechnical Journal, 1988, 25 : 500~510.

    [5] Oloo SY and Fredlund DG.A method of determination of φb for statically compacted soils[J].Canadian Geotechnical Journal, 1996, 33 : 272~280.

    [6] Escario V and Juca J.1989.Shear and deformation of partly saturated soils,Proceedings of the 12nd International Conference on Soil Mechanics and Foundation Engineering .Rio de Janeiro, 43~46.

    [7] Farouk A,Lamboj L,Kos J.Influence of matric suction on the shear strength behaviour of unsaturated sand[J].Czech Technical University Publishing House, 2004, 44 : 11~16.

    [8] Vanapalli SK,Fredlund DE,Paufahl DE.Model for the prediction of shear strength with respect to soil suction[J].Canadian Geotechnical Journal, 1996, 33 : 379~382.

    [9] 扈胜霞, 周云东,刘丰收,陈正汉.非饱和原状黄土强度特性的试验研究[J].岩土力学, 2005, 26 (4): 660~672. Hu Shengxia,Zhou Yundong,Liu Fengshou,Chen Zhenghan. Test study on strength character of unsaturated and undisturbed loess.Rock and Soil Mechanics, 2005, 26 (4): 660~672.

    [10] 陈建斌, 郝红玉,卢方伟.非饱和膨胀土强度特性试验研究[J].土工基础, 2008, 22 (6): 76~80. Chen Jianbin,Hao Hongyu,Lu Fangwei. On the strength characteristic of unsaturated expansive soil.Soil Engineering and Foundation, 2008, 22 (6): 76~80.

    [11] 黄志全, 陈贤挺,刘丰收,姜彤,陈宇.基质吸力对小浪底水库1#滑坡非饱和土强度影响试验研究[J].中国水运, 2007, 07 (7): 123~125. Huang Zhiquan,Chen Xianting,Liu Fengshou,Jiang Tong,Chen Yu.Experimental study on effect of matrix suction on strength of unsaturated soil of the 1# landslide in Xiaolangdi reservoir.China Water Transport, 2007, 7 (7): 123~125.

    [12] 林鸿州, 李广信,于玉贞,吕禾.基质吸力对非饱和土抗剪强度的影响[J].岩土力学, 2007, 28 (9): 1931~1936. Lin Hongzhou,Li Guangxin,Yu Yuzhen,Lv He.Influence of matric suction on shear strength behavior of unsaturated soils.Rock and Soil Mechanics, 2007, 28 (9): 1931~1936.

    [13] 孟黔灵, 姚海林,邱伦峰.吸力对非饱和土抗剪强度的贡献[J].岩土力学, 2001, 22 (4): 423~431. Meng Qianling,Yao Hailin,Qiu Lunfeng.The contribution of matric suction to shear strength of unsaturated soils.Rock and Soil Mechanics, 2001, 22 (4): 423~431.

    [14] Rafael Baker,Sam Frydman.Unsaturated soil mechanics: Critical review of physical foundations[J].Engineering Geology, 2009, 106 : 26~39.

    [15] Matsushi Y,Matsukura Y.Cohesion of unsaturated residual soils as a function of volumatric water content[J].Bulltin of Engineering Geology and the Environment, 2006, 65 : 449~455.

    [16] 中华人民共和国水利部. 土的工程性质分类标准(GB/T50145~2007)[S].北京: 中国计划出版社, 2007. The Ministry of Water Resources,P.R.China.Standard for Engineering Classification of Soils(GB/T50145-2007).Beijing: China Planning Press, 2007.

    [17] 党进谦, 李靖.含水量对非饱和黄土强度的影响[J].西北农业大学学报, 1996, 24 (1): 57~60. Dang Jinqian,Li Jing.Effect of water content on the strength of unsaturated loess.Journal of Northwest A&F University (Natural Science Edition), 1996, 24 (1): 57~60.

    [18] 李志清, 李涛,胡瑞林,李熊,李壮举.饱和土土水特征曲线(SWCC)测试与预测[J].工程地质学报, 2007, 15 (5): 700~706. Li Zhiqing,Li Tao,Hu Ruilin,Li Xiong,Li Zhuangju.Methods for testing and predicting of Swcc in unsaturated soil mechanics.Journal of Enigineering Geology, 2007, 15 (5): 700~706.

    [19] 吴礼舟, 黄润秋,董秀军.非饱和土中的饱和度的求解方法[J].工程地质学报, 2006, 14 (6): 788~791. Wu Lizhou,Huang Runqiu,Dong Xiujun.Methods for measuring degree of saturation in unsaturated soil.Journal of Engineering Geology, 2006, 14 (6): 788~791.

    [20] White N F,Duke HR,Sunada DK,et al.Physics of desaturation in porous materials[J].Journal of Irrigation and Drainage Division,ASCE, 1970, 96 : 165~191.

    [21] 沈珠江. 广义吸力和非饱和土的统一变形理论[J].岩土力学, 1996, 18 (2): 1~9. Shen Zhujiang. Generslized suctions and unified deformation theory for unsaturated soils.Rock and Soil Mechanics, 1996, 18 (2): 1~9.

    [22] 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 Liansheng. New suggestion on shear strength in unsaturated soil based on suction between grains.Chinese Journal of Geotechnical Engineering, 2001, 23 (4): 412~417.

    [23] 栾茂田, 李顺群,杨庆.非饱和土的基质吸力和张力吸力[J].岩土工程学报, 2006, 28 (7): 863~868. Luan Maotian,Li Shunqun,Yang Qing. Matric suction and tension suction of unsaturated soils.Chinese Journal of Geotechnical Engineering, 2006, 28 (7): 863~868.
  • 加载中
计量
  • 文章访问数:  4135
  • HTML全文浏览量:  194
  • PDF下载量:  1123
  • 被引次数: 0
出版历程
  • 收稿日期:  2011-03-02
  • 修回日期:  2011-07-22
  • 刊出日期:  2011-12-25

目录

    /

    返回文章
    返回