| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a microbubble liquid injecting device capable of inhibiting the loss of microbubbles when injecting microbubble liquid into the ground and preventing the liquefaction of the ground, and to provide a method for injecting the microbubble liquid into the ground. <P>SOLUTION: A liquid injecting device 20 includes a liquid supply device 34 for generating microbubbles, a liquid supply pipe 32 having an injection hole 32A, and an on-off valve 64 provided in the injection hole 32A. Herein, microbubble water first reaches the injection hole 32A in the state that the on-off valve 64 is closed, and the on-off valve 64 is subsequently opened to discharge the microbubble water when the pressure of the microbubble water exceeds set pressure. The discharged microbubble water is supplied into the ground 12 in a region where the injection hole 32A is disposed. Thus, the microbubbles are supplied into a liquefaction countermeasure layer S of the ground 12 without any loss and so the saturation grade of the ground 12 decreases to prevent the liquefaction. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
