WATER CUT-OFF METHOD FOR FISSURED ROCK AND CONTROL METHOD FOR GROUND WATER IN FISSURED ROCK

摘要

PURPOSE: To provide a water cut-off method for fissured rock, by which cut-off of water for cracks of a rock can be easily performed, and to easily improve a coefficient of water permeability of a rock so as to easily control ground water. ;CONSTITUTION: In order to prevent leakage of water from the peripheral bedrock 11 at the time of constructing a tunnel 10, a filler such as cement milk, water-glass or the like is mixed with a water swelling fiber and injected into cracks 12 of the bedrock 11. The water swelling fiber contained in the filler is entangled with the peripheral bedrock or sediment particles in a crack while being moved in the crack and swollen to block up the crack, so that a passage of ground water or spring water is cut off to stay a filler such as cement milk or the like in a filling part without being washed away. Thus, a crack of the bedrock can be surely charged with a filler.;COPYRIGHT: (C)1995,JPO