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鉴于颗粒料湿化变形是土石坝、地基基础等工程中变形控制所考虑的重要影响因素,利用外置湿化水头的侧限压缩固结仪,对砂岩颗粒料进行了不同应力水平的湿化试验,研究了单线法湿化变形量与湿化应力、湿化时间的关系;对比了单双线法压缩固结曲线差异,总结了砂岩颗粒料湿化变形规律。试验结果表明,单双线法所测相对湿化变形随湿化应力的变化曲线均呈指数函数关系,此规律在湿化应力较低时吻合程度较高,在湿化应力较高时双线法比单线法所测湿化变形离散性大;所测相对湿化变形差值随湿化应力增大而有减小,最大差值为湿化应力0.10 MPa时的33.63%。单线法所得砂岩颗粒料湿化变形随湿化应力增大而增大,浸水时间相同时应力水平越高,湿化变形越大;随浸水时间增加,颗粒料湿化变形速率先增加后急剧减小,直至趋于稳定。
In view of the fact that the wet deformation of granular materials is an important factor for deformation control in earth-rock dams and foundation foundations, wet-sandstone pellets are wet-tempered at different stress levels by confined compression consolidation The relationship between wetting deformation and wetting stress and wetting time of single wire method was studied. The differences of compression and consolidation curves between single and double wire method were compared, and the wet deformation of sandstone particles was summarized. The experimental results show that the curves of relative wetting deformation measured by the single and double line methods show exponential function with the change of wetting stress. The law of wetting stress is high when the wetting stress is low. When the wetting stress is high, The difference of wetting deformation measured by Fabry-Perot single-line method is large. The difference of relative wetting deformation decreases with the increase of wetting stress. The maximum difference is 33.63% of the wetting stress of 0.10 MPa. The wet deformation of sandstone particles obtained by single-line method increases with the increase of wetting stress. The higher the stress level is, the greater the wetting deformation is. The wet deformation decreases with the increase of immersion time Small until stable.