INJECTION METHOD OF HARDENER GROUTING IN COHESIVE-SOIL GROUND

摘要

PROBLEM TO BE SOLVED: To provide a ground-hardener grouting injection method, by which the generation itself of excess slime is inhibited, which is gentle to environment and by which the improvement effect of a ground and the preparation effects of a supporting layer and a cutoff layer can be ensured sufficiently. ;SOLUTION: In the soil ground of a section, to which a hardener is grouted at the time of lowering of a grouting rod 1, various injection materials such as air, fresh water, etc., are injected and a relaxation-improving layer Z is prepared, a grouting effect is displayed even when the grouting pressure of the hardener is comparatively low pressure and ground pressure is adjusted. The excess moisture and a clay section in relaxed soil are lifted by injecting air from an upper injection nozzle at the time of the grouting of the hardener, and the filling effect of the hardener is improved while upwelling onto the ground of the hardener having an adverse effect on environment inhibited.;COPYRIGHT: (C)1999,JPO