| 摘要 |
PURPOSE:To prevent a grout from being mixed with residue of other grout at a common path, by a method wherein a set program, set in consideration of a distance of a common path running between switching valves for grout and a type of grout, is mounted to a time lag motion controller. CONSTITUTION:If, by means of a signal from a time lag motion controller to which a set program is mounted, 3-way valves 17, 17' are opened to a side of liquid grout paths 16', 19 to start pressure feed pumps 12, 12', an A-liquid grout and a B2 liquid grout are mixed at a forward end of an implanting pipe 1. Then, by means of a signal from said controller 25, the suction side 3-way valve 17 is closed, and the B2 liquid grout in a common path 20 is reliably sucked by the pressure feed pump 12'. Then, by means of a signal from said controller 25, the 3-way valves 17 and 17' are opened to the side of B1 liquid grout paths 16 and 18, and the liquid grout is supplied to a confluence pipe 15 without mixing in the path 20, of the B1 liquid grout with the residue of the B2 liquid grout. |
