METHOD FOR EVALUATING A BONDING STATE OF SHOTCRETE, CAPABLE OF ELIMINATING A RISK FACTOR

摘要

PURPOSE: A method for evaluating a bonding state of shotcrete is provided to overall evaluate the thickness, a bonding state, and a ground state of shotcrete, and to effectively and rapidly manage the quality of the shotcrete.;CONSTITUTION: A method for evaluating a bonding state of shotcrete is as follows. An acceleration signal is obtained by applying impact to shotcrete, and is analyzed in a time-frequency graph. The time-frequency graph is compared with a standard time-frequency graph. It is determined that the shotcrete is a hard rock-complete bonding state, a hard rock-partial bonding state, a hard rock-nonbonding state, a partial empty state, or an empty state. If the shotcrete is an empty state, a resonance frequency, a damping ratio, and a resonance time are calculated.;COPYRIGHT KIPO 2010