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针对不少土力学教材和规范规程认为由UU试验得到的是饱和黏性土的抗剪强度指标,将黏性土不排水抗剪强度视为土的抗剪强度指标的错误概念,首先分析了土的抗剪强度和抗剪强度指标之间的区别,然后通过分析三轴固结不排水剪切试验和土的抗剪强度指标的测定,三轴不固结不排水剪切试验和土的不排水抗剪强度的测定,讨论了黏性土不排水抗剪强度和抗剪强度指标之间的区别。通过软黏土地基中土体的抗剪强度及测定方法的讨论,再次说明了黏性土不排水抗剪强度和抗剪强度指标之间的区别。最后提出岩土工程稳定分析四者相匹配原则。通过讨论分析,澄清了一些模糊概念,有利于提高岩土工程分析水平。
According to many soil mechanics textbooks and codes of practice, it is considered that the UU test is the shear strength index of saturated cohesive soil. Undrained shear strength of clay soil is regarded as the wrong concept of soil shear strength index. Soil shear strength and shear strength index between the difference, and then through the analysis of triaxial consolidation undrained shear test and determination of soil shear strength index, three-axis unconsolidated undrained shear test and soil The determination of undrained shear strength, discussed the difference between undrained clay shear strength and shear strength index. Through the discussion of the shear strength and determination method of soils in soft clay foundation, the difference between undrained shear strength and shear strength index of clayey soil is described again. Finally, put forward the principle of matching four of the stability analysis of geotechnical engineering. Through discussion and analysis, some fuzzy concepts are clarified, which is helpful to improve the geotechnical analysis level.