Abstract:Theory formula of diffusion parameters of Bingham fluid based on column–hemispherical penetration grouting is not existence

such as

diffusion radius of hemispheroid

diffusion length belongs to cylinder et al

so it lag far behind the actual grouting engineering. In this study

according to combining with the rheological equation and seepage motion equation of Bingham fluid

carrying out theoretical analysis and experimental researches

theory formula of diffusion radius of hemispheroid

diffusion length belongs to cylinder based on column–hemispherical penetration grouting were deduced. Relationships between some grouting factors and them based on cylindrical penetration grouting

such as

rheology of Bingham fluid

grout pressure

groundwater pressure and w grouting pipe radius

were analyzed theoretically. What’s more

they were validated by means of designing grouting verifying experiments. Experiment results show theoretical diffusion radius of hemispheroid

diffusion length belongs to cylinder calculated by the formula of diffusion parameters of Bingham fluid based on column–hemispherical penetration grouting have about 25%--30% of the differences with the actual measurement diffusion radius by grouting experiments

but they are all within the acceptable error limits. Therefore

research achievements may not only can provide strong theoretical basis for perfecting the penetration grouting mechanism

but also play a reference guiding role for the theoretical research

design and construction on grouting technique.