Pressurization control of the face is carried out using the high specific gravity and high viscous slurry corresponding to "cutting face water pressure" and "earth pressure".

In process in which this slurry permeates between the ground particles of cutting face, "mud peremeable film" is formed and face is stabilized by applying pressure there.

The slurry shield machine of the "circumferential support type" which Kawasaki Heavy Industries, Ltd. developed in 1975, and the "intermediate support type" developed after that is widely adopted as the soil conditions which carry out congestion as what can respond flexibly, and has developed into the super-large caliber type in which a diameter exceeds 14.0m now.

■Slurry shield machine for excavating on a curve (10.02 meters in diameter)	■Slurry shield machine for excavating rock ground (10.20 meters in diameter)	■Dome type slurry shield machine for excavating the rock ground (4.78 meters in diameter)

■Slurry shield machine (5.24 meters in diameter)	■Slurry shield machine for excavating long-distance mud stone (3.95 meters in diameter)	■Slurry shield machine for excavating long-distance mud stone (3.95 meters in diameter)