摘要
为研究筑坝材料的动残余变形特性,在大型动力三轴仪上进行了动残余变形试验.试验结果表明:残余体积变形随围压和动应力比的提高而增大,固结应力比(或应力水平)对残余体积变形的影响不大;残余剪切变形随围压和动应力比的提高而增大,受固结应力比的影响较大,随固结应力比的提高而增大.为反映不同固结应力比对残余剪切变形的影响,在沈珠江动残余变形模型的基础上提出了经验修正公式,讨论了残余剪切变形的影响因素,分析了小于5 mm粒径颗粒含量对动残余体积变形的影响.
Tests were performed to investigate the dynamic residual deformation characteristics of dam materials by use of a large scale triaxial test apparatus. The results show that the dynamic residual volume deformation increases with the increase of confining pressure and dynamic stress ratio.The consolidated stress ratio（or stress level） has little effect on the residual volume deformation. The dynamic residual shear deformation increases with the increase of confining pressure and dynamic stress ratio,and it is greatly influenced by the consolidated stress ratio and increases with the increase of the consolidated stress ratio.A modified formula based on Shen Zhu-jiang＇s model was proposed to depict the effect of various consolidated stress ratios on the residual shear deformation.The influencing factors for the residual deformation were discussed.The effect of content of particles smaller than 5 mm on the dynamic residual volume deformation was analyzed.
出处
《河海大学学报（自然科学版）》
CAS
CSCD
北大核心
2010年第5期532-537,共6页
Journal of Hohai University(Natural Sciences)
基金
国家自然科学基金委员会
二滩水电开发有限责任公司雅砻江水电开发联合基金(50639050)
关键词
坝料
动应力
残余体积变形
残余剪切变形
dam material
dynamic stress
residual volume deformation
residual shear deformation
