Fig. 8From: Experimental investigation on grout propagation in poured aggregates for controlling water inrush in tunnels with flowing waterGrouting mechanisms in aggregates a. permeation and filling (Trial no. 13; red → green → blue) b. compaction-permeation (Trial no. 5; red → green → blue) c. compaction-fracturing (Trial no. 1; red → blue)Back to article page