| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an injection reinforcing rigid member for maintenance repair of cement mortar spray, having large pressure force, excellent in straightness of the reinforcing rigid member, not making deformation occur in the whole of a pressure plate even when the injection reinforcing rigid member hits a rock protruding from the inner wall of a drill hole, and having structurally no problem even if it is not pulled out from natural ground and the like. <P>SOLUTION: An injection reinforcing rigid member 1 is provided with a substantially circular pressure plate 12 at a tip part of a steel tubular body 11. The pressure plate 12 has nearly the same size as that of the inner diameter of a drilled hole, namely, that of the outer diameter of a drilling bit. A plurality of slits 122 extending from an outer periphery 121 of the pressure plate 12 to an outer peripheral surface of the tubular body 11 are formed at proper intervals in the circumferential direction, and cut off parts 123 are formed at intersection points between the outer periphery 121 and the slits 122. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
