【摘要】 文中针对黑龙江省寒区公路建设所穿过区域的页岩进行干湿循环处理,研究不同干湿循环次数和条件对页岩自由膨胀率影响变化。结果表明页岩自由膨胀率随干湿循环次数的增加而增大,干湿循环前2～3次增长尤为明显;烘干页岩在干湿循环作用下自由膨胀率明显大于自然风干,其自由膨胀率变化值稳定早于自然风干岩样。研究结果旨在为今后黑龙江页岩区公路建设提供理论参考。更多还原

【Abstract】 To study the influence of different cycles and conditions on the free expansion rate of shale, the drywet cycle treatment was carried out on the shale in the cold area of Heilongjiang Province. The results show that the free expansion rate of shale increases with the increase of the number of dry-wet cycles,especially in the first2-3 cycles. The free expansion rate of dried shale under the action of dry-wet cycles is significantly greater than that of natural air-dried shale,and the stable free expansion rate is earlier than that of natural air-dried rock samples. The research results are intended to provide a theoretical reference for future highway construction in Heilongjiang shale area.更多还原