贵州残积红粘土的力学强度特征  

MECHANICAL STRENGTH OF RESIDUAL LATERITE IN GUIZHOU

作　　者：李景阳[1] 

机构地区：[1]贵州工业大学

出　　处：《贵州工业大学学报（自然科学版）》1997年第2期73-79,共7页Journal of Guizhou University of Technology(Natural Science Edition)

摘　　要：根据１０多组残积红粘土的三轴剪切试验、气压固结试验等资料，探讨了残积红粘土的力学特性。研究结果认为：残积红粘土是超固结中—低压缩性土，Ｐｃ值由０．２４～０．４８ＭＰａ，剪切过程中应力—应变曲线呈“Ｓ”型；土体的强度包络线不是一条直线而呈曲线状，所以土的强度参数ｃ，φ值随施加的主应力值而变化，总应力和有效应力所求出的ｃ、φ值亦有差别。总之，残积红粘土是一种特殊的土，其强度特征与成土过程中形成的结构强度密切相关。The characteristics of mechanical strength of residual laterite in Guizhou are studied through more than ten sets of triaxial compression test and compressed-air consolidation test et al.The results are as follows:The residual laterite is an over-compressive,middle-lower consolidated clay.Pre-consolidated pressure is about 0.24-0.48 Mpa.Stress-strain curves are S-shaped.The envelope of soil mass is a curve rather than a straight line,and the strength parameters c,Φ vary with the principal stress.The c,Φ values evaluated from total stress and effective stress are also different.So residual laterite is a special kind of clay with its strength closely related to structual strength in the laterite formation.

关 键 词：残积红粘土 力学强度 红粘土 气压固结试验 

分 类 号：TU411.3[建筑科学—岩土工程]