Research on the Diffusion Law of Vertical Crack Grouting Based on the Time-Varying Viscosity of Slurry
In response to the problem of vertical crack grouting diffusion mechanism,a vertical single crack grouting diffusion theoretical model considering the self weight of the slurry is constructed based on the diffusion law of viscosity time-varying slurry,and the vertical crack grouting diffusion control equation considering the self weight and viscosity time-varying of the slurry is derived.Research has shown that the slurry in vertical cracks is influenced by its own weight and diffuses in an elliptical radial direction along the cracks,rather than in a circular shape.The viscosity time-varying of slurry and grouting pressure also have an important impact on the diffusion law,but the impact on the slurry diffusion range is weakened when the grouting pressure difference exceeds a certain range.Therefore,in the early stage of grouting,the slurry viscosity is small,and the diffusion range can be controlled by adjusting the grouting pressure difference.In the later stage,the viscosity solidification reaction rate increases sharply.While the slurry is fully diffused in the crack,gel forms a reinforced sealing body in the crack surface.The results of this study can provide theoretical reference for the design of vertical crack grouting in the future.
vertical cracksself weight of slurryviscosity time-varyinggrouting pressure
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