| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a liquid medicine injection pipe for foundation improvement with which sediment in foundation can be prevented from flowing into an outer pipe body, an inner pipe body can easily be inserted to and ejected from the outer pipe body and even if an injection range is deep, a liquid medicine can be injected into the foundation. <P>SOLUTION: In an outer pipe body 32 of a liquid medicine injection pipe, a valve member 42 composed of an elastic material for covering a strainer hole 40 is provided on an outer circumferential surface, a plurality of seal members 44 slidably in tight contact with an inner surface of the outer pipe body 32 are provided at longitudinal intervals on a side face of a monitor 34 in a distal end portion of an inner pipe body 30, and a side face discharge hole 46 is provided toward a side direction while communicating from the inside of the inner pipe body 30 to the side face at a position within the intervals. When injecting a liquid medicine, the pressurized liquid medicine is introduced into the inner pipe body 30, the liquid medicine is discharged from the side face discharge hole 46 to increase an inner pressure inside the outer pipe body 32 between the seal members 44,44, and the valve member 42 of the strainer hole 40 is opened, thereby injecting the liquid medicine from the strainer hole 40 into foundation around the outside of the outer pipe body 32. <P>COPYRIGHT: (C)2013,JPO&INPIT |
