• 全国中文核心期刊
  • 中国科技核心期刊
  • 美国工程索引(EI)收录期刊
  • Scopus数据库收录期刊
GAO You, SUN De-an. Determination of basic parameters of unimodal and bimodal soil water characteristic curves[J]. Chinese Journal of Geotechnical Engineering, 2017, 39(10): 1884-1891. DOI: 10.11779/CJGE201710017
Citation: GAO You, SUN De-an. Determination of basic parameters of unimodal and bimodal soil water characteristic curves[J]. Chinese Journal of Geotechnical Engineering, 2017, 39(10): 1884-1891. DOI: 10.11779/CJGE201710017

Determination of basic parameters of unimodal and bimodal soil water characteristic curves

More Information
  • Received Date: July 25, 2016
  • Published Date: October 24, 2017
  • The determination of basic parameters (such as air-entry value, residual suction, slope at transition zone, etc.) of soil-water characteristic curve (SWCC) is the most fundamental for predicting the strength, permeability and constitutive relation of unsaturated soils. In this paper a method is proposed to determine the basic parameters of unimodal and bimodal SWCCs based on the modified Fredlund and Xing’s fitting equation. Firstly, the parameters of the fitting equation can be obtained by the optimal fitting of experimental data. For the bimodal SWCC, the piecewise fitting method is adopted based on the pore size distribution characteristics of soils. Secondly, the slopes and equations of tangent lines are obtained in the transition and residual zones based on the geometric relationship of the fitting equation. Furthermore, the air-entry value and residual suction of SWCCs are determined by the geometric relationship of tangent lines. Finally, the proposed method is validated to be feasible by use of the experimental data of unimodal and bimodal SWCCs.
  • [1]
    FREDLUND D G, RAHARDJO H. Soil mechanics for unsaturated soils[M]. New York: John Wiley & Sons, Inc., 1993.
    [2]
    VANAPALLI S K, FREDLUND D G, PUFAHL D E. The influence of soil structure and stress history on the soil-water characteristics of a compacted till[J]. Géotechnique, 1999, 49(2): 143-159.
    [3]
    ALONSO E E, PEREIRA J M, VAUNAT J, OLIVELLA S. A microstructurally based effective stress for unsaturated soils[J]. Géotechnique, 2010, 60(12): 913-925.
    [4]
    LU N, GODT J W, WU D T. A closed-form equation for effective stress in unsaturated soil[J]. Water Resources Research, 2010, 46(5): W05515.
    [5]
    ZHOU A N, SHENG D C, CARTER J P. Modelling the effect of initial density on soil water characteristic curves[J]. Géotechnique, 2012, 62(8): 669-680.
    [6]
    MUALEM Y. A new model for predicting the hydraulic conductivity of unsaturated porous media[J]. Water Resources Research, 1976, 12(3): 513-522.
    [7]
    AGUS S S, LEONG E C, SCHANZ T. Assessment of statistical models for indirect determination of permeability functions from soil-water characteristic curves[J]. Géotechnique, 2003, 53(2): 279-282.
    [8]
    张 昭, 刘奉银, 张国平. 土在全含水率范围内持水及非饱和渗透特性的模型描述[J]. 岩土工程学报, 2014, 36(11): 2069-2077. (ZHANG Zhao, LIU Feng-yin, ZHANG Guo-ping. Models for water retention and unsaturated permeability in full range of water content[J]. Chinese Journal of Geotechnical Engineering, 2014, 36(11): 2069-2077. (in Chinese))
    [9]
    KIM W, BORDEN R H. Influence of soil type and stress state on predicting shear strength of unsaturated soils using the soil-water characteristic curve[J]. Canadian Geotechnical Journal, 2011, 48(12): 1886-1900.
    [10]
    SHENG D C,FREDLUND D G, GENS A. A new modeling approach for unsaturated soils using independent stress variables[J]. Canadian Geotechnical Journal, 2008, 45(4): 511-534.
    [11]
    FREDLUND D G, XING A. Equation for the soil-water characteristic curve[J]. Canadian Geotechnical Journal, 1994, 31(4): 521-532.
    [12]
    SIMMS P H, YANFUL E K. Measurement and estimation of pore shrinkage and pore distribution in a clayey till during soil-water characteristic curve tests[J]. Canadian Geo- technical Journal, 2001, 38(4): 741-754.
    [13]
    LI X, ZHANG L M. Characterization of dual-structure pore-size distribution of soil[J]. Canadian Geotechnical Journal, 2009, 46(2): 129-141.
    [14]
    BURTON G J, SHENG D, Campbell C. Bimodal pore size distribution of a high-plasticity compacted clay[J]. Geotechnique Letters , 2014, 4: 88-93.
    [15]
    MIGUEL M G, BONDER B H. Soil-water characteristic curves obtained for a colluvial and lateritic soil profile considering the macro and micro porosity[J]. Geotechnical & Geological Engineering, 2012, 30(30): 1405-1420.
    [16]
    孙德安, 高 游, 刘文捷, 等. 红黏土的土水特性及其孔隙分布[J]. 岩土工程学报, 2015, 37(2): 351-356. (SUN De-an, GAO You, LIU Wen-jie, WEI Chang-fu, ZHANG Sheng. Soil-water characteristics and pore-size distribution of lateritic clay[J]. Chinese Journal of Geotechnical Engineering, 2015, 37(2): 351-356. (in Chinese))
    [17]
    VAN GENUCHTEN T M. A closed-form predicting the hydraulic conductivity of unsaturated soil[J]. Soil Science Society of America Journal, 1980, 44(44): 892-898.
    [18]
    KOSUGI K. Three-parameter lognormal distribution model for soil water retention[J]. Water Resources Research, 1994, 30(30): 891-901.
    [19]
    LI X, LI J H, ZHANG L M. Predicting bimodal soil-water characteristic curves and permeability functions using physically based parameters[J]. Computers and Geotechnics, 2014, 57(4): 85-96.
    [20]
    SATYANAGA A, RAHARDJO H, LEONG E C, et al. Water characteristic curve of soil with bimodal grain-size distribution[J]. Computers and Geotechnics, 2013, 48(4): 51-61.
    [21]
    THU T M, RAHARDJO H, LEONG E C. Soil-water characteristic curve and consolidation behavior for a compacted silt[J]. Canadian Geotechnical Journal, 2007, 44(3): 266-275.
    [22]
    VANAPALLI S K, SILLERS W S, FREDLUND M D. The meaning and relevance of residual water content to unsaturated soils[C]// Proceedings of 51st Canadian Geotechnical Conference. Edmonton, 1998: 101-108.
    [23]
    周葆春, 孔令伟, 陈 伟, 等. 荆门膨胀土土-水特征曲线特征参数分析与非饱和抗剪强度预测[J]. 岩石力学与工程学报, 2010, 29(5): 1052-1059. (ZHOU Bao-chun, KONG Ling-wei, CHEN Wei, et al. Analysis of characteristic parameters of soil- water characteristic curve(SWCC) and unsaturated shear strength prediction of Jingmen expansive soil[J]. Chinese Journal of Rock Mechanics and Engineering, 2010, 29(5): 1052-1059. (in Chinese))
    [24]
    ZHAI Q, RAHARDJO H. Determination of soil-water characteristic curve variables[J]. Computers and Geotechnics, 2012, 42(42): 37-43.
    [25]
    LINS Y, SCHANZ T. Determination of hydro-mechanical properties of sand[J]. Information Sciences, 2005, 181(17): 3570-3580.
    [26]
    ROMERO E, GENS A, LLORET A. Water permeability, water retention and microstructure of unsaturated compacted Boom clay[J]. Engineering Geology, 1999, 54(1/2): 117-127.
  • Related Articles

    [1]LIU Hongwei, WANG Mengqi, ZHAN Liangtong, FENG Song, WU Tao. Method and apparatus for measuring in-situ gas diffusion coefficient and permeability coefficient of unsaturated soils[J]. Chinese Journal of Geotechnical Engineering, 2024, 46(5): 948-958. DOI: 10.11779/CJGE20221228
    [2]JI Yong-xin, ZHANG Wen-jie. Experimental study on diffusion of chloride ions in unsaturated soils[J]. Chinese Journal of Geotechnical Engineering, 2021, 43(9): 1755-1760. DOI: 10.11779/CJGE202109022
    [3]XU Fei, CAI Yue-bo, QIAN Wen-xun, WEI Hua, ZHUANG Hua-xia. Mechanism of cemented soil modified by aliphatic ionic soil stabilizer[J]. Chinese Journal of Geotechnical Engineering, 2019, 41(9): 1679-1687. DOI: 10.11779/CJGE201909012
    [4]HUANG Wei, LIU Qing-bing, XIANG Wei, ZHANG Yun-long, WANG Zhen-hua, DAO Minh Huan. Water adsorption characteristics and water retention model for montmorillonite modified by ionic soil stabilizer[J]. Chinese Journal of Geotechnical Engineering, 2019, 41(1): 121-130. DOI: 10.11779/CJGE201901013
    [5]ZHANG Wen-jie, GU Chen, LOU Xiao-hong. Measurement of hydraulic conductivity and diffusion coefficient of backfill for soil-bentonite cutoff wall under low consolidation pressure[J]. Chinese Journal of Geotechnical Engineering, 2017, 39(10): 1915-1921. DOI: 10.11779/CJGE201710021
    [6]HUANG Qing-fu, ZHAN Mei-li, SHENG Jin-chang, LUO Yu-long, ZHANG Xia. Numerical method to generate granular assembly with any desired relative density based on DEM[J]. Chinese Journal of Geotechnical Engineering, 2015, 37(3): 537-543. DOI: 10.11779/CJGE201503019
    [7]LIU Qing-bing, XIANG Wei, CUI De-shan. Effect of ionic soil stabilizer on bound water of expansive soils[J]. Chinese Journal of Geotechnical Engineering, 2012, 34(10): 1887-1895.
    [8]LIU Qing-bing, XIANG Wei, CUI De-shan, CAO Li-jing. Mechanism of expansive soil improved by ionic soil stabilizer[J]. Chinese Journal of Geotechnical Engineering, 2011, 33(4): 648.
    [9]Microcosmic mechanism of ion transport in charged clay soils[J]. Chinese Journal of Geotechnical Engineering, 2010, 32(11): 1794-1799.
    [10]XI Yong, Hui, REN Jie. Laboratory determination of diffusion and distribution coefficients of contaminants in clay soil[J]. Chinese Journal of Geotechnical Engineering, 2006, 28(3): 397-402.

Catalog

    Article views (524) PDF downloads (416) Cited by()
    Related

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return