In order to investigate the diffusion behavior of a novel Karst pipe grouting material(WIS new grouting material)under flowing water conditions,this study examined the flow pattern of WIS new grouting material through rheological experiments based on its inherent physical and chemical properties.Furthermore,it established a constitutive relationship by considering the temporal and spatial distribution of viscosity,thereby elucidating the dynamic evolution process of the mixture grout within the pipeline.The characteristics of slurry diffusion morphology changed over time under different parameters such as grouting rate,pipe diameter,and slurry particle size were calculated using COMSOL Multiphysics numerical simulation software.Furthermore,the simulation test compared and analyzed the evolution law of the velocity field in the pipe.The findings indicated that the new WIS grouting material could be classified as a slurry with viscosity exhibiting time-space variation;The viscosity of grout particles increased progressively during the process of diffusion migration,exhibiting a temporal and spatial distribution pattern.Each adjacent grout particle possessed distinct viscosity values as the grouting diffusion took place.The interparticle distance underwent continuous reduction,accompanied by a simultaneous decrease in the diffusion distance.The numerical simulation results demonstrated a distinct asymmetry in the diffusion process of WIS grouting material,with an increasing diffusion distance along the water as grouting diffusion time increased.The diffusion distance exhibited a negative correlation with the grouting rate and a positive correlation with both pipe diameter and slurry size.There was a significant negative correlation between the flow rate of the downstream pipe and the grouting diffusion time.The results of numerical simulation were in accordance with those of the simulation test,and the validity of the simulation test was verified within the acceptable range of error.The research findings could provide a dependable theoretical foundation and serve as a valuable reference for designing grouting parameters in Karst pipeline water outburst environments.
关键词
WIS新型注浆材料/动水注浆/黏度时空变化/浆液扩散/数值仿真
Key words
WIS new grouting material/running water grouting/the spatiotemporal variation of viscosity/slurry diffusion/numerical simulation
维普
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