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本文以合肥红色粘土及含泥砂土进行的单轴压缩试验,得出抗压强度及抗剪强度指标,同时得出这类土的应力应变曲线的两种形态及试样破坏的两种形态。含泥砂土样的破坏形态及强度取决于砂土及夹杂于其中的粘土的性质及分布形态。风化土的应力应变关系基本上符合双曲线模式,并据此推导出风化土的割线模量的表达式。
In this paper, the uniaxial compression tests of Hefei red clay and sandy soil are used to obtain the compressive strength and shear strength indexes. At the same time, the two types of stress and strain curves of this kind of soil and the two forms of specimen destruction are obtained. The damage morphology and strength of sandy soil samples depend on the nature and distribution of the sand and the clays mixed in it. The stress-strain relationship of the weathered soil basically conforms to the hyperbolic model, and the expression of the secant modulus of the weathered soil is deduced accordingly.