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为探究浸水时间对饱水岩石抗剪强度参数的影响规律,对天然状态、饱水状态及不同浸水时间的饱水闪长岩和饱水灰岩进行直剪试验,试验结果表明:浸水时间对饱水闪长岩和饱水灰岩的抗剪强度参数的影响规律基本一致,即在浸水时间不长(1~14d)的情况下,抗剪强度参数随浸水时间的增加其值降低幅度较大;在浸水时间较长(14~60d)的情况下,抗剪强度参数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,抗剪强度参数趋于稳定;浸水时间对饱水闪长岩和饱水灰岩内聚力的影响程度均大于其对内摩擦角的影响程度。
In order to explore the influence law of immersion time on the shear strength parameters of saturated rock, the direct shear tests on natural state, saturated state and saturated diorite and saturated limestone with different immersion time were carried out. The results showed that: The influence law of shear strength parameters of saturated diorite and saturated limestone is basically the same, that is, under the condition of not immersed for a long time (1 ~ 14d), the decrease of shear strength parameter with the increase of immersion time When the water immersion time is longer than 60d, the shear strength parameters tend to be stable with the immersion time being more than 60d; the immersion time is longer The influence degree of cohesion of saturated diorite and saturated limestone is larger than that of cohesion force.