岩石の弾性波伝播速度および弾性定数と含水の関係について : I

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It is important for the non-destructive testing carried out the measurement of wave propagation velocities to know the extent of variation of the propagation velocity of elastic waves in porous rocks by changing water content. We had been made an investigation of this problems. In this paper, we showed experimental results of the propagation velocity of elastic waves in rock specimens cured at the four circumstances which are the most easy curing method. They are (1) cooling in a desicator contained silicagel silicagel at room temparature after heating in the drying oven at 100〜110℃ above 24 hours, (2) drying in desicator contained silicagel to become an constant weight, (3) room dry, and (4) immersing in water during about a month to become an constant weight. On the experiment, the velocity of longitudinal vibration V_<pl> and the velocity of shear wave V_<ps> were measured by ultrasonic pulse method, and the velocity of longitudinal vibration V_<Rl> and the velocity of torsional vibration V_<RS> were measured by resonant frequency method. Summary of this experiment are; (1) The propagation velocity of dilatational waves in racks cured at desicator with silicagel or at room dry measured by pulse method became the minimum, and the velocity increased when rock specimens were more saturated. (2) Velocities of the longitudinal vibration measured by resonant frequency method gradually decreased when rock specimens were saturated from dry state. (3) Both shear wave velocities measured by pulse method and resonant frequency method show a similar tendency of variation of the wave velocity with saturation of rocks.
一般社団法人日本応用地質学会の論文
1970-12-01

岩石の弾性波伝播速度および弾性定数と含水の関係について : I

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