| 摘要 |
PURPOSE: A direct-boring grouting device is provided to heighten the mixing efficiency of an 'A' fluid and a 'B' fluid and to reduce production costs by decreasing the number of grouting rods. CONSTITUTION: The direct-boring grouting device comprises the steps of attaching an 'A' fluid injection pipe(1) to a primary grouting rod(41), fastening a secondary grouting rod(51) to the lower end of the primary grouting rod(41), attaching a fluid injection control valve(61) and a check valve(71) to the secondary grouting rod(51), and fastening a boring bite(81) to the lower end of the secondary grouting rod(51).
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