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.
出处
《贵州工业大学学报（自然科学版）》
CAS
1997年第2期73-79,共7页
Journal of Guizhou University of Technology(Natural Science Edition)
关键词
残积红粘土
力学强度
红粘土
气压固结试验
residual laterite
compressed-air consolidation test
triaxial compression test
mechanical strength
Guizhou
