| 摘要 |
PROBLEM TO BE SOLVED: To minimize a large volume of slurry which has been generated heretofor because grout is left in an agitator or a pipe line at every time after completion of one injection process and is disposed of and is washed out in conventional cases. SOLUTION: A plurality of agitotors (2) for every kind of mixing are installed and connected to a central plant section (10) through pipe lines (15). Respective agitators (2) are connected to a an injection pump (4) through a first changeover valve (6). Grout having a specified mixing ratio is force-fed by changing over the valve in sequence. Return pipes are branched from the delivery side of the pump (4). A second changeover valve (7) selectively connected to respective agitators (2) is provided.
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