摘要
红土作为一种特殊土，归一化性状是否存在是个值得研究的问题。用平均主应力作为归一化应力，对红土在两种不同应力路径下三轴排水试验的应力－应变－体变关系进行归一性分析研究表明，在１００ｋＰａ～４００ｋＰａ的团结压力下，红土的归一化程度较低，不能求得唯一的归一化曲线，团结压力越低，归一性越差；随压力增大，归一性增强。偏应力－剪应变的归一性高于偏应力－体应变的归一性；对偏应力－剪应变关系，σ_３＝Ｃ应力路径的归一性高于ｐ＝Ｃ应力路径的归一性；对偏应力－体应变关系，ｐ＝Ｃ应力路径的归一性稍优于σ_３＝Ｃ应力路径的归一性。各归一化曲线及对应的归一化参数都受应力路径和团结压力的影响，归一化参数与应力路径之间具有较好的线性相关关系。
Laterite is a special soil. whose normalization is worth research. The normalization, of stress-strain-volumetric strain for laterite is studied through drained triaxial tests by various stress pathes in which the mean stress is used as the normalized stress. The results show that the normalization for laterite is relatively poor: under two stress pathes (σ_3=c and p =c). the normalized curves of deviator stress-shear strain and deviator stress-volumetric strain are both poor. no exact normalized curve exists. and the smaller the consolidation pressure. the poorer the normalization: The normalized property of deviator stress-shear strain is better than that of deviator stress-volumetric strain. and it is better under the path σ_3=c than under the path p = c. It is also showed that each normalized curve and its parameters are affected by stress pathes and consolidation pressure. and that the parameters are linearly correlated with stress pathes.
出处
《大坝观测与土工测试》
2000年第2期36-38,42,共4页
Dam Observation and Geotechnical Tests
基金
云南省科委应用基础研究基金!(编号97E048M)
关键词
红土
应力-应变-体变
归一化
应力路径
laterite
stress-strain-volumetric strain relationship
normalization
stress path
consolidation pressure
linear correlation
