| 摘要 |
PROBLEM TO BE SOLVED: To provide a solidifying material injection method which enables the control of the injection rate of grout on conventionally difficult conditions, for example, control for performing injection at a constant low flow rate under constant high discharge pressure for a long period of time, as in the case of grouting in dam construction work. SOLUTION: In this solidifying material injection method, an inverter (28), which is interposed between power supply cables (27) for supplying an electric current from a power source (26) to an electric motor (22) for driving a pump (3) for injecting a solidifying material, is controlled to decrease the frequency (f) of the electric current supplied to the electric motor (22), to increase a value (I) of the electric current supplied to the electric motor (22), and to maintain the state of the decrease of the frequency (f) and the increase of the value (I) for a long time. COPYRIGHT: (C)2007,JPO&INPIT
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