【摘要】 降雨会在土石坝体中导致非饱和入渗过程,并可发生显著的湿化变形,从而对坝体的应力变形性状产生重要的影响。该文采用模拟降雨入渗的方法控制堆石体的湿化饱和度,进行了侧限压缩条件下的非饱和湿化试验,研究和分析了堆石体的非饱和入渗过程和不同饱和度情况下的湿化变形特性。试验分析结果表明,只有小孔隙吸附水才是有效湿化含水量,堆石体的湿化变形主要发生在小含水量湿化阶段,而大孔隙自由水为无效含水量,对堆石料湿化变形的影响不大;对所研究的糯扎渡弱风化花岗岩堆石料,其有效湿化饱和度小于25.5%。更多还原

【Abstract】 During the unsaturated rainfall infiltration process in earth and rockfill dams,the wetting deformation of rockfill materials is usually significant,which may greatly affect the overall stress-deformation characteristics of the dam.In this study,a simulated rainfall infiltration approach is used to control the wetting saturation in rockfill materials.Oedometer tests are conducted at different wetting saturation to analyze the unsaturated infiltration process and wetting deformation characteristics of rockfill materials.From the test results,it can be seen that the wetting deformation of rockfill materials mainly occurs at relatively small wetting saturation,which indicates that water in large pores does not contribute much to the wetting deformation.For the Nuozhadu slightly weathered granite rockfill material,the effective wetting saturation is less than 25.5%.更多还原