| 摘要 |
PROBLEM TO BE SOLVED: To provide a crack part evaluation method for a ground surface reinforcement layer that can evaluate a crack state and a ground state of a crack part of the reinforcement layer formed on a ground surface.SOLUTION: When a crack part of a ground structure which has a shotcrete layer 11 of concrete etc., formed on the surface of the ground 10 as a reinforcement layer is evaluated, an elastic wave propagated in the shotcrete layer 11 from one side of the crack part formed on a surface of the shotcrete layer 11 is measured at a plurality of measurement points set across the crack part, and a crack state of the crack part and a ground state are evaluated based upon acceleration data and propagation speed data on the elastic wave which are calculated based upon measured values. |
