水力发电学报2026，Vol.45Issue(8)：71-83,13.DOI:10.11660/slfdxb.20260807
堆石料状态相关最终流变模型及工程应用
State-dependent final rheological model for rockfill materials and its engineering application
摘要
Abstract
The rheological properties of rockfill materials are a primary factor contributing to the post-construction settlement of a rockfill dam,and improving compaction quality can reduce such settlement effectively.In this study,large-scale triaxial creep tests are conducted on rockfill specimens with different initial void ratios.We develop a compaction state-dependent final rheological model considering the void ratio effect,and examine the influence of compaction quality on the long-term deformation of a rockfill dam.The results indicate the rheological behavior of rockfill materials depends significantly on the compaction state-the smaller the initial void ratio,the bigger the attenuation rate of creep velocity and the smaller the final creep deformation.The dilatancy equation of the modified Cam-clay model well describes the rheological dilatancy relationship of rockfill materials,and the rheological critical dilatancy stress ratio decreases exponentially with the void ratio.Our final rheological model,equipped with 5 parameters,can uniformly characterize the final rheological behavior of rockfill materials under different compaction states;It is applicable to refined simulations of the effect of spatial variability in compaction quality on the long-term deformation of a rockfill dam.Compaction quality imposes a remarkable influence on the post-construction settlement of rockfill dams-the larger the initial void ratio,the more significant the increase in settlement,while the growth of downstream displacement is relatively smaller.关键词
土石坝/堆石料/流变特性/初始孔隙比/变形预测Key words
earth-rock dam/rockfill material/rheological property/initial void ratio/deformation prediction分类
建筑与水利引用本文复制引用
王柳江,王琦,韩华强,刘斯宏,沈超敏,毛航宇..堆石料状态相关最终流变模型及工程应用[J].水力发电学报,2026,45(8):71-83,13.基金项目
国家重点研发计划项目(2022YFE0105000) （2022YFE0105000）
国家自然科学基金(52479121 （）
52479099) （）
