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Volume 41 Issue S1
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JIANG Ming-jing, SUN Ruo-han, LI Tao, LIU Jun. A three-dimensional cementation contact model for unsaturated structural loess[J]. Chinese Journal of Geotechnical Engineering, 2019, 41(S1): 213-216. DOI: 10.11779/CJGE2019S1054
Citation: JIANG Ming-jing, SUN Ruo-han, LI Tao, LIU Jun. A three-dimensional cementation contact model for unsaturated structural loess[J]. Chinese Journal of Geotechnical Engineering, 2019, 41(S1): 213-216. DOI: 10.11779/CJGE2019S1054
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A three-dimensional cementation contact model for unsaturated structural loess

  • 1. Department of Civil Engineering, School of Civil Engineering, Tianjin University, Tianjin 300072, China;
    2. State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300072, China;
    3. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China

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  • Received Date: April 29, 2019
  • Published Date: July 14, 2019
    Graphical Abstract
    • Abstract
  • An adaptable three-dimensional (3D) contact model is necessary to perform discrete element simulation (DEM)on unsaturated structural loess, in which the effects of adhesive force and chemical cementation bond have to be taken into account. A 3DDEM contact model is introduced to simulate the macroscopic and microscopic mechanical behaviors of unsaturated and structural loess by considering the effects of adhesive force and chemical cementation. Interparticle adhesive force is composed of van der Waals attractions and capillary forces. Both bond stiffness and strength are associated with the bond size to represent unrecoverable chemical cementation. By using the relationships between water content and suction, a new 3D contact model for loess is established considering the coupling effects of water content-void ratio-suction. The DEM is used to simulate the triaxial and wetting tests at different deviator stress levels and the results show that the 3D contact model can well reproduce the macroscopic mechanical behaviors of unsaturated structural loess.
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    • References (11)
  • [1]
    BARDEN L, MCGOWN A, COLLINS K.The collapse mechanism in partly saturated soil[J]. Engineering Geology, 1973, 7(1): 49-60.
    [2]
    DELENNE J Y, EIYOUSSOUFI M S, CHERBLANC F, et al.Mechanical behaviour and failure of cohesive granular materials[J]. International Journal for Numerical and Analytical Methods in Geomechanics, 2004, 28(15): 1577-1594.
    [3]
    JIANG M J, SUN Y G, LI L, et al.Contact behavior of idealized granules bonded in two different interparticle distances: An experimental investigation[J]. Mechanics of Materials, 2012, 55: 1-15.
    [4]
    SHEN Z F, JIANG M J, WAN R.Numerical study of inter‐particle bond failure by 3D discrete element method[J]. International Journal for Numerical and Analytical Methods in Geomechanics, 2016,40(4): 523-545.
    [5]
    JIANG M J, SHEN Z F, WANG J F.A novel three-dimensional contact model for granulates incorporating rolling and twisting resistances[J]. Computers and Geotechnics, 2015, 65: 147-163.
    [6]
    ITASCA. User manual of particle flow code[Z].2015.
    [7]
    李涛. 非饱和结构性黄土三维离散元模拟与本构模型研究[D]. 上海: 同济大学, 2017.
    (LI Tao.Three-dimensional DEM simulation and constitutive model of unsaturated structural loess[D]. Shanghai: Tongji University, 2017. (in Chinese))
    [8]
    JIANG M J, KONRAD J M, LEROUEIL S.An efficient technique for generating homogeneous specimens for DEM studies[J]. Computers and Geotechnics, 2003, 30(7): 579-597.
    [9]
    VAN GENUCHTEN M T. A closed-form equation for predicting the hydraulic conductivity of unsaturated soils[J]. Soil Science Society of America Journal, 1980, 44(5): 892-898.
    [10]
    GARAKANI A A, HAERI S M, KHOSRAVI A, et al.Hydro-Mechanical behavior of undisturbed collapsible loessial soils under different stress state conditions[J]. Engineering Geology, 2015, 195: 28-41.
    [11]
    张苏民, 郑建国. 力和水作用先后次序对湿陷性黄土力学性状的影响[J]. 勘察科学技术, 1990, 3: 10-14.
    (ZHANG Su-min, ZHENG Jian-guo.Influence of order of force and water on mechanical properties of collapsible loess[J]. Site Investigation Science and Technology, 1990, 3: 10-14. (in Chinese))
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