Muddy water treatment method and muddy water treatment equipment in the muddy water shield method

摘要

PROBLEM TO BE SOLVED: To provide a muddy water processing method and a muddy water processing facility of a muddy water type shield driving capable of adding an appropriate amount of a coagulant to suit a change with time of a property of the muddy water.SOLUTION: A muddy water processing facility 10 of a muddy water type shield driving performs coagulant processing by adding a coagulant at a midway point of a muddy water pipe 45 while muddy water flows, and includes a coagulant pump control part 65a that controls a transfer flow amount of the coagulant to the muddy water pipe 45 transferred by coagulant transfer means 55. The coagulant pump control part 65a calculates a necessary transfer flow amount of the coagulant to the muddy water pipe 45 based on a measurement signal from a specific gravity meter 43 and a measurement signal from a flow meter 47, and controls a discharging operation of a coagulant pump 57 so that the transfer flow amount would be the calculated necessary transfer flow amount.SELECTED DRAWING: Figure 1