| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a repair method for enabling adequate repair of a joint gap inner face formed at the end of a concrete floor slab of a bridge while involving grinding work, although conventionally considered to be difficult. <P>SOLUTION: A high pressure water injection nozzle 22 is inserted through an upper part opening 6a of a joint gap 6 formed at the end of the concrete floor slab of the bridge for grinding a concrete surface layer part of a joint gap inner face 8 with the high pressure water injection of the high pressure water injection nozzle to form a vertical ground space 9. A lower end 8a of the joint gap inner face is left without being ground during grinding work to form a projection 10 which restricts the vertical ground space. A concrete form is erected with reference to the end face of the projection, and a repair material is filled into the vertical ground space defined by the concrete form and the projection. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
