Under what circumstances did the shield use bentonite? Under what circumstances do you use foam? Used to improve soil mass
Earth pressure shield is to ensure the earth pressure in the case of soil improvement, so as to smooth the sediment discharge.
In EPB shield machine, we generally in poor condition when the shield, such as high viscosity of the clay layer, adding foam, make the soil loose, easy to soil in soil discharged, without plugging in the screw machine export department. The effect of bentonite is the same.
