长江科学院院报2016，Vol.33Issue(6)：70-74,5.DOI:10.11988/ckyyb.20150166
考虑固结路径影响的花岗岩残积土不排水剪切试验研究
Experimental Study on Undrained Shear Behavior of Granite Residual Soil under Various Consolidation Stress Paths
摘要
Abstract
In engineering practice, conventional triaxial tests under isotropically consolidated conditions cannot re⁃flect the effects of various stress paths on the mechanical behavior of granite residual soil which is widely distributed in south China. To investigate the influence of the initial mean effective stress p′c and the initial stress ratioηc on the undrained shear behavior of reconstituted granite residual soil, a series of triaxial tests under different consolidated conditions were conducted on the GDS triaxial apparatus. The test results revealed that both the initial mean effec⁃tive stress and the initial stress ratio have effects on the undrained shear behavior. It was found that, for the granite residual soil in this study, under the same initial stress ratio, there would be an increase of undrained shear strength and excess pore water pressure with a higher initial mean effective stress. Besides, under the same initial mean effective stress, the higher the initial stress ratio is, the higher the undrained shear strength and the lower the excess pore water pressure would be. However, a unique critical state line can be postulated in e⁃p′⁃q space, re⁃gardless of the various initial mean effective stress and initial stress ratio.关键词
花岗岩残积土/三轴试验/应力路径/临界状态线/三维空间Key words
granite residual soil/triaxial test/stress path/critical state line/3-D space分类
建筑与水利引用本文复制引用
刘攀,周小文,何勇彬,赵仕威..考虑固结路径影响的花岗岩残积土不排水剪切试验研究[J].长江科学院院报,2016,33(6):70-74,5.基金项目
国家自然科学基金项目（51109083）；华南理工大学亚热带建筑科学国家重点实验室自主课题 （）
