大连理工大学学报2017，Vol.57Issue(6)：577-584,8.DOI:10.7511/dllgxb201706005
考虑颗粒破碎的堆石料蠕变特性研究
Research on creep behavior of rockfill materials considering particle breakage
摘要
Abstract
After the completion of high rockfill dams,particle breakage and reorganization occurred continuously in the dam cause the significant creep deformation of rockfill materials (RFMs).Oversize deformation of RFMs will lead to impervious system failure and affect safety operation of the dams. Particle breakage is one of the main factors that lead to the creep of RFMs.To research the effect of the particle breakage on the creep,based on the Weibull distribution of the particle strength and particle fractal crushing theory, a time-dependent particle delayed failure strength formula is introduced and a method for the prediction of particle grading evolution during the creep process is proposed.Then,by building the relationship between the creep and relative breakage parameters,the creep deformation of the triaxial sample is calculated.Finally,the validity of the method is verified by the triaxial creep tests.The new method can not only well predict the creep deformation of RFMs, but also well reflect the evolution of the particle grading curve during the creep process.关键词
堆石料/单粒强度试验/Weibull分布/颗粒级配演化Key words
rockfill materials/single-particle strength test/Weibull distribution/evolution of particle grading分类
建筑与水利引用本文复制引用
王峰,迟世春,王振兴..考虑颗粒破碎的堆石料蠕变特性研究[J].大连理工大学学报,2017,57(6):577-584,8.基金项目
国家自然科学基金资助项目(51379029). （51379029）
