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Volume 34 Issue 6
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YAO Zhi -hua, CHEN Zheng-han, HUANG Xue-feng, ZHANG Shi-jing, YANG Xiao-hui. Hydraulic conductivity of unsaturated undisturbed and remolded Q3 loess[J]. Chinese Journal of Geotechnical Engineering, 2012, 34(6): 1020-1027.
Citation: YAO Zhi -hua, CHEN Zheng-han, HUANG Xue-feng, ZHANG Shi-jing, YANG Xiao-hui. Hydraulic conductivity of unsaturated undisturbed and remolded Q3 loess[J]. Chinese Journal of Geotechnical Engineering, 2012, 34(6): 1020-1027.
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Hydraulic conductivity of unsaturated undisturbed and remolded Q3 loess

  • 1. Department of Architectural Engineering, Logistical Engineering University of PLA, Chongqing 401311, China ; 2. School of Civil Engineering, Lanzhou University of Technology, Lanzhou 730050, China

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  • Published Date: June 19, 2012
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    • Abstract
  • In order to study the hydraulic conductivity of unsaturated Q3 loess, an equipment for sampling undisturbed loess is designed, four vertical and horizontal loess columns are acquired successfully and five remolded soil columns with different dry densities are prepared. The tests on horizontal soil columns of nine samples are carried out. TDR moisture meters and thermal conduction suction probes are embedded to monitor volumetric water content and matric suction in different sample sections. The results indicate that the infiltration velocity is influenced by crack direction and dry density of the soil columns. For the undisturbed loess samples, the infiltration velocity of vertical samples is greater than that of horizontal samples at the beginning stage of soaking tests. When the wetting front exceeds 50 cm, the infiltration velocities of vertical and horizontal samples get close to each other. The differences of diffusion coefficient between undisturbed vertical and horizontal samples exist distinctly below the saturation degree 0.6. When the saturation degree surpasses 0.6, the diffusion coefficients are nearly identical. As to the remolded loess samples, the effect of dry density on the diffusion coefficient mainly exists in the lower saturation degree area. Under the same dry density and moisture content, the unsaturated hydraulic conductivity of the remolded samples is greater than that of the undisturbed samples in the lower saturation degree area, however, in the higher saturation degree area, the unsaturated hydraulic conductivity of the undisturbed samples is greater than that of the remolded samples. The sampling method for the undisturbed loess and the research findings of those tests give some referential values to the same studies.
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  • [1]
    雷志栋 , 杨诗秀 , 谢森传 . 土壤水动力学 [M]. 北京 : 清华大学出版社 , 1988: 21, 92 – 94. (LEI Zhi-dong, YANG Shi-xiu, XIE Shen-chuan. Soil hydrodynamics[M]. Beijing: Tsinghua University Press, 1998: 21, 92 – 94. (in Chinese))
    [2]
    VAN GENUCHTEN M. A closed form equation for prediction the hydraulic conductivity of unsaturated soils[J]. Soil Sci Am J, 1980, 44 : 892 – 898.
    [3]
    FREDLUND D G, XING An-qing, HUANG Shang-yan. Predicting the permeability for unsaturated soils using the soil-water characteristic curve [J]. Canadian Geotechnical Journal, 1994, 31 : 533 – 546.
    [4]
    KHALEEL R, RELYEA J F. Evaluation of van Genuchten- Mualem relationships to estimate unsaturated hydraulic conductivity at low water contents[J]. Water Resources Res, 1995, 31 : 2659 – 2668.
    [5]
    LEONG E C, RAHARDJO H. Permeability functions for unsaturated soil[J]. Geotech Geoenvir Eng J, 1997, 123 (12): 1118 – 1126.
    [6]
    ZHUANG J, NAKAYAMA K, YU G R R, et al. Predicting unsaturated hydraulic conductivity of soil based on some basic soil properties[J]. Soil & Tillage Research, 2001, 59 : 143 – 154.
    [7]
    WAGNER B, TARNAWSKI V R, HENNINGS V, et al. Evaluation of Pedo-transfer functions for unsaturated soil hydraulic conductivity using an independent data set[J]. Geoderma, 2001, 102 : 275 – 297.
    [8]
    MARSHALL T J. A relation between permeability and size distribution of pores[J]. Soil Sci, 1958, 9 (1): 1 – 8.
    [9]
    MUALEM Y. A new model for predicting the hydraulic conductivity of unsaturated porous media[J]. Water Res Res, 1976, 12 (3): 513 – 522.
    [10]
    TOLEDO P G, NOVY R A, DAVIS H T, et al. Hydraulic conductivity of porous media at low water content[J]. Soil Sci Soc Am J, 1990, 54 : 673 – 679.
    [11]
    XU Yong-fu. Calculation of unsaturated hydraulic conductivity using a fractal model for the pore-size distribution[J]. Computers and Geotechnics, 2004, 31 : 549 – 547.
    [12]
    HENDRAYANTO, KOSUGI K, MIZUYAMA T. Field determination of unsaturated hydraulic conductivity of forest soils[J]. Journal of Forest Research, 1998, 3 : 11 – 17.
    [13]
    LI X, ZHANG L M, FREDLUND D G. Wetting front advancing column test for measuring unsaturated hydraulic conductivity[J]. Canadian Geotechnical Journal, 2009, 46 (12): 1431 – 1445.
    [14]
    王文焰 , 张建丰 . 室内一维土柱入渗试验装置系统的研究及应用 [J]. 土壤学报 , 1991, 28 (4): 447 – 451. (WANG Wen-yan, ZHANG Jian-feng. Study and application of infiltration experimental equipment for one-dimensional soil column in laboratory[J]. ACTA Pedologica Sinica, 1991, 28 (4): 447 – 451. (in Chinese)).
    [15]
    陈正汉 , 谢定义 , 王永胜 . 非饱和土的水气运动规律及其工程性质研究 [J]. 岩土工程学报 , 1993, 15 (3): 9 – 20. (CHEN Zheng-han, XIE Ding-yi, WANG Yong-sheng. Experimental studies of laws of fluids motion, suction and pore pressures in unsaturated soils[J]. Chinese Journal of Geotechnical Engineering, 1993, 15 (3): 9 – 20. (in Chinese))
    [16]
    李永乐 , 刘翠然 , 刘海宁 , 等 . 非饱和土的渗透特性试验研究 [J]. 岩石力学与工程学报 , 2004, 23 (22): 3861 – 3865. (LI Yong-le, LIU Cui-ran, LIU Hai-ning, et al. Testing study on permeability characteristics of unsaturated soil[J]. Chinese Journal of Rock Mechanics and Engineering, 2004, 23 (22): 3861 – 3865. (in Chinese)).
    [17]
    高永宝 , 刘奉银 , 李 宁 . 确定非饱和土渗透特性的一种新方法 [J]. 岩石力学与工程学报 , 2005, 24 (18): 3258 – 3261. (GAO Yong-bao, LIU Feng-yin, LI Ning. A new method for determination of permeability of unsaturated soils[J]. Chinese Journal of Rock Mechanics and Engineering, 2005, 24 (18): 3258 – 3261. (in Chinese))
    [18]
    王铁行 , 卢 靖 , 张建锋 . 考虑干密度影响的人工压实非饱和黄土渗透系数的试验研究 [J]. 岩石力学与工程学报 , 2006, 25 (11): 2364 – 2368. (WANG Tie-hang, LU Jing, ZHANG Jian-feng. Experimental study on permeability coefficient of artificiality compacted unsaturated loess considering influence of density[J]. Chinese Journal of Rock Mechanics and Engineering, 2006, 25 (11): 2364 – 2368. (in Chinese))
    [19]
    徐永福 , 兰守奇 , 孙德安 , 等 . 一种能测量应力状态对非饱和土渗透系数影响的新型试验装置 [J]. 岩石力学与工程学报 , 2005, 24 (1): 160 – 164. (XU Yong-fu, LAN Shou-qi, SUN De-an, et al. New apparatus for measurement of stress effect on permeability of unsaturated soil[J]. Chinese Journal of Rock Mechanics and Engineering, 2005, 24 (1): 160 – 164. (in Chinese))
    [20]
    D G 弗雷德隆德 , H 拉哈尔佐 . 非饱和土力学 [M]. 陈仲颐 , 张在明 , 陈愈炯 , 等译 . 北京 : 中国建筑工业出版社 , 1997: 114 – 124. (FREDLUND D G, RAHARDJO H. Soil mechanics for unsaturated soils[M]. CHEN Zhong-yi, ZHANG Zai-ming, CHEN Yu-jiong, translators. Beijing: China Architecture and Building Press, 1993. (in Chinese))
    [21]
    FREDLUND D G, SHUAI F, FENG M. Use of a new thermal conductivity sensor for laboratory suction measurement[C]// Proc 1st Asian Conf on unsaturated Soils. Singapore, 2000: 275 – 280.
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