Abstract:

 Funnel viscosity is a key index of slurry, which has significant influence on the boring of shield machines. To certain extent, the funnel viscosity is an indicator of the quality of slurries. Slurries with high funnel viscosity have strong filter cake forming capacity and muck carrying capacity; but on the other hand slurries with high funnel viscosity have higher cost and higher pumping difficulty and worse separation result. The funnel viscosities measured by different instruments vary greatly. By means of tests and regression curve analysis, the authors obtain the relation between Chinese funnel viscosity and Japanese funnel viscosity and analyze the influence of the mixing proportions of slurries on the funnel viscosities.

Key words: slurry balanced shield machine, slurryfunnel viscosity