| 摘要 |
<p>PROBLEM TO BE SOLVED: To rapidly and easily measure a distribution of elastic wave speeds showing the characteristic of subsoil. SOLUTION: In this elastic wave speed logging method, a plurality of foci (detonators 12) having the function of regulating vibration generation time are buried in target subsoil, and after a transmitting device (ignition device 15) capable of imparting vibration generation signals to the plurality of foci (detonators 12) at the same time are connected to the foci (detonators 12), the vibration generation signals are imparted to the foci (detonators 12) at the same time by the transmitting device (ignition device 15) to generate vibrations at the foci (detonators 12) in sequence at predetermined time intervals. Elastic waves generated by the vibrations are measured at a predetermined measuring point.</p> |
