论文部分内容阅读
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%。
Rainfall can lead to unsaturated infiltration process in the earth-rock dam, and significant wetting deformation can occur, which has an important impact on the stress-strain characteristics of the dam. In this paper, the method of simulated rainfall infiltration was used to control the wet saturation of rockfill body. The unsaturated humidification test under confined compression was carried out. The infiltration process of unsaturated rockfill body and different saturation Case of wet deformation characteristics. The experimental results show that only the pore adsorption water is the effective wetting water content. The wet deformation of the rockfill body occurs mainly in the wet stage of small water content, while the macropore free water is the invalid water content, wetting the rockfill material The effect of deformation is insignificant. For Nuozhudu weakly weathered granite rockfill, the effective wetting saturation is less than 25.5%.