浸水时间对饱水岩石纵波波速影响的试验研究

The Experiment Research for the Influence of Immersion Time on Wave Velocity of Saturated Rocks

为探究浸水时间对饱水岩石纵波波速的影响规律，对天然状态、饱水状态及浸水时间分别为1，7，14，30，60d和90d的饱水闪长岩和饱水灰岩岩样进行纵波波速测试，试验结果表明：浸水时间对饱水闪长岩和饱水灰岩纵波波速的影响规律基本一致，即浸水时间不长（1～14d）时，纵波波速随浸水时间的增加其值降低幅度较大；浸水时间较长（14～60d）时，纵波波速随浸水时间的增加其值降低幅度逐渐较小；浸水时间超过60d后，纵波波速趋于稳定。

To investigate the influence of immersion time on the wave velocity of saturated rocks, the wave velocities of diorite and limestone were tested in natural state and saturated state, as well as the immersion time of 1, 7, 14, 30, 60 d and 90 d. The tests results showed that the immersion time had the same influence on the wave velocities of two different rocks. The wave velocity decreased significantly with the increase of immersion time when the immersion time was not too long （from 1 d to 14 d）, but reduced with relatively less acceleration in the range of 14 d to 60 d. When the immer-sion time was beyond 60 d, the velocity tended to be stable.