【摘要】 膨胀性泥岩在不同围压下的固结不排水三轴试验的结果表明泥岩的应力应变关系呈应变软化特性,峰值强度、残余强度及残余强度比均随围压的增大而增大。根据应力应变关系的试验结果,分析了膨胀性泥岩的割线模量和发挥内摩擦角,结果表明割线模量和发挥内摩擦角均随围压的变化而变化,且拟合了割线模量和发挥内摩擦角与应变的关系。更多还原

【Abstract】 The results of undrained consolidated triaxial tests of expansive mudstone under different confining stress show that the stress-strain relationships have the characteristic of strain softening and the peak strength,residual strength and residual strength ratio increase with the increasing of confining stress.According to experimental results of stress-strain relationships,the secant modulus and mobilized internal friction angle are analyzed,and the results show that the modulus and mobilized friction angle change with variation of the strain,furthermore,equations between them and the strain are fitted.The factors that affected non-linear strength characteristic were analyzed.更多还原