CONCRETE BASE MATERIAL REPAIRING METHOD, BORING TOOL, INJECTION PLUG, INJECTION UNIT

PROBLEM TO BE SOLVED: To provide a concrete base material repairing method, in which formation of an injection hole on concrete base material and plug fixation into the injection hole may be carried in a short time period, and plug removal from the injection hole may be easily carried out after hardening of liquid repairing material injected into the injection hole, and provide a boring tool, an injection plug and injection unit which may be preferably used in the concrete base material repairing method.SOLUTION: There is provide an injection plug 20 comprising an axis part 21 which is screwed into an injection hole 13 on concrete base material 10 so that it may be fixed, an injection unit 20A in which the injection plug 20 is covered with a ring shape gasket 25, a repairing method where the injection plug 20 whose axis part 21 is screwed into the injection hole 13 which is formed in a manner extending vertically on surface 11 of the concrete base material 10 is rotated in reverse way from screwing after hardening of the liquid repairing material to remove it, and a boring tool for formation of the injection hole 13.SELECTED DRAWING: Figure 8 【課題】コンクリート母材への注入孔の形成、及び注入孔へのプラグ固定を短時間で容易に行なうことができ、注入孔に注入した液状補修材の硬化後に注入孔からのプラグ撤去を容易に行えるコンクリート母材補修工法、及び、このコンクリート母材補修工法に好適に使用できる穿孔工具、注入用プラグ、注入用ユニットの提供。【解決手段】コンクリート母材１０の注入孔１３にねじ込んで定着可能な軸部２１を有する注入用プラグ２０、この注入用プラグ２０にリング状のパッキン２５を外挿した注入用ユニット２０Ａ、コンクリート母材１０にその表面１１に垂直に延在形成した注入孔１３に軸部２１をねじ込んだ注入用プラグ２０を液状補修材の硬化後にねじ込み時とは逆向きに回転させて撤去する補修工法、注入孔１３形成用の穿孔工具を提供する。【選択図】図８