Abstract
Collapses of cutting faces and air blow are reported to have occurred during tunneling earth pressure shield method in sand beds and gravel beds with high permeability.
The purposes of this study were to find the improved fluidity of excavated soils in which earth pressure type shields are applicable and to clarify the scope of conditions in which this type of shield is usable.
As a result, it was learned that the admixed materials mixing ratio on the soil properties is has a high possibility of being actually used in tunnels.
