【摘要】 通过不同干密度、不同吸力的非饱和重塑膨胀土的三轴剪切试验,研究分析了广西非饱和重塑膨胀土的应力应变硬化与软化和体变剪缩剪胀特性与土样内部的孔隙孔径大小及孔隙间的连通性的相关性,研究表明低密度试样内部孔隙孔径较大且连通性较好,应力–应变曲线表现为硬化和体变呈剪缩性,当土样密度增大后逐步由硬化–剪缩向软化剪胀转化,同时研究发现非饱和重塑膨胀土的的吸力强度与吸力的双曲特性。更多还原

【Abstract】 The tri-axial tests of unsaturated remolded Guangxi expansive soils were performed for different dry densities and controlled suction.The relation of the hardening,softening,dilation and compaction features of Guangxi remolded expansive soils with the pore structure was studied.The results showed that the stress-strain curves were those of hardening type and the volume strains were dilation for low dry density soil sample because the pore size was large with good connectivity for low density samples.The hardening type of stress-strain curves would transfer to the softening type when the dry density of soil samples increased.The relationship between suction strength and suction was a hyperbolic feature.更多还原