Model Experiment Study on Chemical Permeation Grouting in Porous Sandstone
WANG He-ping
LI Gui-yun
QIAN Zi-wei
ZHOU Hai-tao
TANG Xin
Abstract：A model experiment method was applied to study the grout diffusion backfill law of the por ‐ous sandstone material model under the condition of different bumping value. The results showed that the chemical grout would have an inhomogeneity existed in the backfill of the model material pores. When the grouting completed ,a relationship between the model permeability coefficient k , strength p ,pore backfill rate η and the grouting speed v could be fitted with the power law function and the correlation coefficients were all over 0.96. The relationship with the grout diffusion distance of L could be fitted with the index function ,logarithm function and index function and the correlation co ‐efficients were all over 0.98. The grout backfill rate could be calculated with the comprehensive fitting formula. As a same grouted rock and soil mass ,the grout backfill rate of the grouting was mainly de‐pended on the grouting speed and the grout diffusion distance.
Keywords：porous sandstonepermeation groutingmodel experimentdiffusion model
Publication Date：2015-02-15
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 28-31 )