INJECTION METHOD OF HARDENER GROUTING IN SANDY-SOIL GROUND

摘要

PROBLEM TO BE SOLVED: To provide a ground-hardener grouting construction method, in which the usage of bentonite, etc. is abolished and the generation itself of excess slime is inhibited, which is gentle to environment and in which the improvement effect of a ground and the preparation effects of a supporting layer and a cutoff layer can be ensured sufficiently. ;SOLUTION: A thickening solution and air are injected and grouted to a soil ground in a section, to which a hardener is grouted at the time of the lowering of a grouting rod 1, and a pit-wall protective improving layer Z is prepared and self-standing is imparted while the layer Z is utilized even as a barrier filtering the harmful component of slime. The excess moisture, etc. of 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 is inhibited.;COPYRIGHT: (C)1999,JPO