| 摘要 |
PURPOSE:To raise the safety and economy of repairing work by a method in which a separating condition between the mountain surface and a protective wall layer is detected by an impulsive elastic wave measuring method, an injection hole is drilled in the separated portion detected, and a curable filler is injected to fill up the aperture. CONSTITUTION:An impaction is applied to a protective wall layer, its reflection sound is received by a receiving sensor and converted into an electric signal, and the wave form of the electric signal is observed by an oscillograph to confirm the separating condition between the mountain surface and the protective wall layer. Then, an injection hole drilled from the protective wall layer side, and a curable filler composed of bentonite and cement, for example, is injected from the hole to fill up the aperture. By this, maldetection of the separating condition can be prevented and the safety and economy of the repairing work can be raised. |
