GROUT INJECTION CONTROL METHOD AND DEVICE

PROBLEM TO BE SOLVED: To provide a method and a device capable of shortening a work time by simultaneously performing a cleaning process and an injection process without polluting a global environment by a waste liquid. SOLUTION: This grout injection control method injects grout into the natural ground by mixing in the predetermined concentration by a mixer of an injection line connected to a confluent pipe, by sending a diluted liquid to the confluent pipe via a second supply line, and by sending undiluted solution grout to the confluent pipe via a first supply line; and prevents the putting-out of the waste liquid by using a cleaning agent liquid as the diluted liquid, by cleaning the line when the diluted liquid passes, and by sending the undiluted solution grout and the diluted liquid to the confluent pipe by alternately being switched to the second supply line from the first supply line and to the first supply line from the second supply line. COPYRIGHT: (C)2007,JPO&INPIT