Column Penetration and Diffusion Mechanism of Bingham Fluid Considering Displacement Effect

Applied Sciences

Na He¹  Wenfei Xi²  Dan Zhang³  Chaoyue Li³  Yi Yang³  Meng Zhou³  Yingyan Zhu³  Zhiquan Yang³  Yuchi Ding³  Zhiwei Zhang⁴  Xianfu Bai⁵  Deming He⁶ 

[1] College of Civil Engineering, Henan University of Technology, Jiaozuo 454000, China;Department of Geography, Yunnan Normal University, Kunming 650500, China;Faculty of Public Safety and Emergency Management, Kunming University of Science and Technology, Kunming 650093, China;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 650093, China;Yunnan Seismological Bureau, Kunming Institute of Earthquake Prediction, Kunming 650093, China;Yunnan Wenshan Aluminum Co., Ltd., Wenshan 663000, China;

关键词: Bingham fluid;    penetration grouting;    displacement effect;    column diffusion;   

DOI  :  10.3390/app12115362

来源: DOAJ

【 摘 要 】

The diffusion progress of grout is hindered by groundwater, which means the diffusion distance cannot reach the designed values required in engineering for water plugging or reinforcement. In this study, based on the generalized Darcy’s law and the continuity equation of steady column penetration, a column diffusion mechanism for Bingham fluid, considering the displacement effect of grout on groundwater, is proposed. This diffusion mechanism is then validated by the penetration grouting experiments that have been previously performed. The influences of the grouting pressure, groundwater pressure, water–cement ratio and penetration coefficient of porous media on the diffusion radius are analyzed. Based on the Comsol Multiphysics platform, a three-dimensional numerical simulation program for this mechanism is developed using computer programming technology. Numerical simulations of the penetration and diffusion morphology of Bingham cement grout in porous media are then carried out. The results show that the theoretical calculation values of diffusion radius obtained from this mechanism are closer to the experimental values than those obtained from the column penetration grouting theory of Bingham fluid, without considering the displacement effect. The results of this study can provide theoretical support for practical grouting engineering.

【 授权许可】

Unknown