Rock and Soil Mechanics ›› 2022, Vol. 43 ›› Issue (2): 385-394.doi: 10.16285/j.rsm.2021.1224

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Penetration grouting mechanism of Binham fluid considering diffusion paths

LU Qiao1, 2, 3, YANG Zhi-chao1, 2, 3, YANG Zhi-quan1, 2, 3, YU Rong-xia1, 2, 3, ZHU Ying-yan1, 2, 3, 4, YANG Yi1, 2, 3, ZHANG Bi-hua5, WANG Ren-chao6, FANG Ying-chao7, YU Dong-liang7, LIU Hao8, SU Jian-kun8   

  1. 1. Faculty of Public Safety and Emergency Management, Kunming University of Science and Technology, Kunming, Yunnan 650093, China; 2. Key Laboratory of Geological Disaster Risk Prevention and Control and Emergency Disaster Reduction of Ministry of Emergency Management of the People's Republic of China, Kunming University of Science and Technology, Kunming, Yunnan 650093, China; 3. Key Laboratory of Early Rapid Identification, Prevention and Control of Geological Diseases in Traffic Corridor of High Intensity Earthquake Mountainous Area of Yunnan Province, Kunming University of Science and Technology, Kunming, Yunnan 650093, China; 4. Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, Sichuan 610041, China; 5. Beijing Fibote Photoelectric Technology Co., Ltd., Beijing 100083, China; 6. School of Computer Science and Engineering, University of Electronic Science and Technology of China, Chengdu, Sichuan 611731, China; 7. PipeChina Southwest Pipeline Company, Chengdu, Sichuan 610041, China; 8. Yunnan Aerospace Engineering Geophysical Detecting Co., Ltd., Kunming, Yunnan 650217, China
  • Received:2021-08-05 Revised:2021-12-06 Online:2022-02-11 Published:2022-02-22
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (41861134008), the Muhammad Asif Khan Academician Workstation of Yunnan Province (202105AF150076), the Key R&D Program of Yunnan Province (202003AC100002) and the General Program of Basic Research Plan of Yunnan Province (202001AT070043).

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Abstract: The diffusion path of grout in porous media has a significant effect on the diffusion range and grouting effect. Based on the fractal characteristics and the seepage motion equation of Bingham fluid in porous media, the penetration grouting mechanism of Bingham fluid considering the diffusion path was revealed through theoretical analysis, and verified by the penetration grouting test carried out by the team in the previous studies. The effects of porosity of porous media, water-cement ratio of Bingham cement slurry, permeability coefficient of porous media, grouting pressure and groundwater pressure on diffusion radius are analyzed. In addition, a 3D numerical simulation program of penetration grouting mechanism of Bingham fluid considering the diffusion path was developed through Comsol Multiphysics platform. Then the penetration and diffusion morphology effect of Bingham cement grout in porous media was investigated by the developed simulation program. The results show that the theoretical calculation value of diffusion radius obtained by using the Bingham fluid penetration grouting mechanism considering the diffusion path is closer to the experimental value than that obtained by the spherical diffusion formula of Bingham fluid penetration grouting without considering the diffusion path. The results can provide theoretical support for practical grouting engineering.

Key words: porous media, diffusion path, Bingham fluid, penetration grouting

CLC Number: 

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