BUBBLES-CONTAINING ANTI-FRICTION MATERIALS, BUBBLES-CONTAINING FLUIDIZING MATERIALS, PRODUCING METHOD THEREOF AND CONSTRUCTION METHOD OF SHIELD BY USING THEM

摘要

To provide bubbles-containing anti-friction materials, bubbles-containing fluidizing materials, a method for producing them and a shielding method, which can maintain volume variability of bubbles for a long time, have resistance to dilution with water and can reduce the used amount of plastic clay to be substantial anti-friction materials (fluidizing materials).SOLUTION: Bubbles-containing anti-friction materials (bubbles-containing fluidizing materials) contain clay sand, water, bubbles and a plasticity strength conditioner. The bubbles-containing anti-friction materials (bubbles-containing fluidizing materials) are produced by mixing the liquid A fed from a liquid A tank 14 and the bubbles discharged from a foaming gun 6 in a line mixer part 10, then adding the liquid B fed from a liquid B tank 16. The bubbles-containing anti-friction materials (bubbles-containing fluidizing materials) are discharged from an anti-friction materials injection nozzle 23 (fluidizing materials injection nozzle) after being fed from an anti-friction materials discharge port 24 (fluidizing material discharge port 26) through an anti-friction materials line 25 (fluidizing materials line 27) and also fill between the natural ground drilled by a shield machine 1 and an outer peripheral surface of a machine body 2, or between a working face and a cutter head 3, or between the cutter head 3 and the natural ground.SELECTED DRAWING: Figure 1