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通过对以高岭石含量为主软岩块体自然吸水率的对比试验,研究了不同尺度软岩块体泡水不同时间以及经历不同干湿循环次数后块体吸水率的变化规律,并就其吸水差异性进行了探讨。研究结果表明:随着泡水时间的增加,高岭石软岩吸水率呈负指数关系增加,在泡水初期增速较大,随后逐渐变缓,并趋于稳定;软岩吸水具有明显的尺度效应,饱和吸水率随块体尺度的增加而降低,并趋于一个稳定值;随着干湿循环次数的增多,岩样块体的饱和吸水率增大,增速逐渐变缓,并趋向于某一恒定值。
By comparing the natural water absorption rate of kaolinite mainly composed of soft rock mass, the changing regularity of water absorption rate of block in different sizes of soft rock bulk water at different times and under different cycles of wetting and drying were studied. The water absorption differences were discussed. The results show that the water absorption of kaolinite soft rock shows a negative exponential relationship with the increase of bubbling water time, and increases slowly in the initial period of soaking water, then gradually becomes slower and tends to be stable. Water absorption of soft rock has obvious The scale effect and saturated water absorption decreased with the increase of block size and tended to a stable value. With the increase of the number of drying and wetting cycles, the saturated water absorption of block increased and the rate of increase slowed gradually, At a constant value.