Discrete Element Study on Mechanical Properties of MICP-Treated Sand under Triaxial Compression

被引:0
|
作者
Xie, Liquan [1 ]
Zhou, Jingsong [1 ]
Shen, Li [2 ]
Ji, Yifan [1 ]
Li, Wenlin [1 ]
Cheng, Yaofei [3 ]
机构
[1] Tongji Univ, Coll Civil Engn, Shanghai 200092, Peoples R China
[2] Tongji Univ, Sch Med, Shanghai 200092, Peoples R China
[3] Guangxi Pinglu Canal Construct Co Ltd, Nanning 535000, Peoples R China
关键词
microbial-induced calcium carbonate precipitation (MICP); discrete element method; shear strength; precipitation mode; microscopic mechanism; INDUCED CARBONATE PRECIPITATION; DISTRIBUTIONS; OPTIMIZATION; DEFORMATION; SIMULATIONS;
D O I
10.3390/jmse12091503
中图分类号
U6 [水路运输]; P75 [海洋工程];
学科分类号
0814 ; 081505 ; 0824 ; 082401 ;
摘要
Microbial-induced calcium carbonate precipitation (MICP) has attracted much attention as a promising technology for soil improvement in the infrastructures of marine engineering. This paper introduces a novel numerical sample preparation technique for MICP-treated sand, with particular attention paid to the distribution patterns of calcium carbonate, including contact cementing, bridging, and grain coating. The effect of calcium carbonate content (CCC) on the deformation and failure mechanism is studied at macroscopic and granular scales. The findings show that a small amount of calcium carbonate can quickly increase the strength of sand. The strength improvement and deformation control of MICP technology are better than those of traditional compaction treatment. As the calcium carbonate content increases, the mechanical coordination number of the sand also increases, indicating a more stable microstructure of the sand phase. In the contact bonding mode, initial failure occurs as shear failure between sand and calcium carbonate. In the bridge mode, initial failure manifests as shear failure between calcium carbonate particles. In the coating mode, initial failure occurs as tensile failure between sand and calcium carbonate. Calcium carbonate contributes to a reduction in both sliding and rolling movements among sand particles.
引用
收藏
页数:19
相关论文
共 50 条
  • [21] A simple model for predicting the hydraulic conductivity of MICP-treated sand
    Department of Civil Engineering and Smart Cities, College of Engineering, Shantou University, Guangdong, Shantou
    515063, China
    Environ. Sci. Pollut. Res., 2024, 40 (52905-52916): : 52905 - 52916
  • [22] Discrete element simulation of the mechanical properties of shale with different bedding inclinations under conventional triaxial compression
    Yang S.-Q.
    Sun B.-W.
    Tian W.-L.
    Gongcheng Kexue Xuebao/Chinese Journal of Engineering, 2022, 44 (03): : 430 - 439
  • [23] Evaluation of Factors Affecting Erodibility Improvement for MICP-Treated Beach Sand
    Chek, Abigail
    Crowley, Raphael
    Ellis, Terri N.
    Durnin, Michael
    Wingender, Brian
    JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING, 2021, 147 (03)
  • [24] Dynamic strength of temperature-controlled MICP-treated calcareous sand
    Xiao P.
    Liu H.-L.
    Zhang Y.
    Jiang X.
    Li C.
    Chu J.
    Xiao Y.
    Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering, 2021, 43 (03): : 511 - 519
  • [25] Interface Shear Behavior between MICP-Treated Calcareous Sand and Steel
    Li, Yujie
    Guo, Zhen
    Wang, Lizhong
    Ye, Zhe
    Shen, Chaofeng
    Zhou, Wenjie
    JOURNAL OF MATERIALS IN CIVIL ENGINEERING, 2021, 33 (02)
  • [26] Experiment and discrete element modeling of particle breakage in coral sand under triaxial compression conditions
    Hu, Fenghui
    Fang, Xiangwei
    Yao, Zhihua
    Wu, Huanran
    Shen, Chunni
    Zhang, Yitao
    MARINE GEORESOURCES & GEOTECHNOLOGY, 2023, 41 (02) : 142 - 151
  • [27] Mechanical and Engineering Behavior of MICP-Treated Coarse Siliceous Sands
    Shan, Zhigang
    Zhang, Peng
    Kou, Hailei
    KSCE JOURNAL OF CIVIL ENGINEERING, 2022, 26 (01) : 79 - 87
  • [28] Mechanical and Engineering Behavior of MICP-Treated Coarse Siliceous Sands
    Zhigang Shan
    Peng Zhang
    Hailei Kou
    KSCE Journal of Civil Engineering, 2022, 26 : 79 - 87
  • [29] Compressive Strength of MICP-Treated Silica Sand with Different Particle Morphologies and Gradings
    Song, Chenpeng
    Wang, Chaoyi
    Elsworth, Derek
    Zhi, Sheng
    GEOMICROBIOLOGY JOURNAL, 2022, 39 (02) : 148 - 154
  • [30] A prediction model of dynamic pore water pressure for MICP-treated calcareous sand
    Liu H.
    Zhang Y.
    Guo W.
    Xiao P.
    Huang M.
    Chu J.
    Xiao Y.
    Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering, 2021, 40 (04): : 790 - 801