Creep Characteristics and Micro-Pore Structural Changes of Saline Sulfate Soil under Different Salt Contents
In order to explore the creep characteristics and micro-pore structural changes of sulfate saline soil under different salt content conditions,a series of creep tests were conducted on sulfate saline soil samples from the Hongsipu area in Ningxia using a custom-made one-dimensional creep apparatus,and post-experiment soil samples were examined with a scanning electron microscope.The results indicated that after one-dimensional creep,the final creep content of the soil increased with the increase of salt content,and decreased with the decrease of temperature.The creep rate decreased over time.Moreover,with the increase in salt content and temperature,the soil experienced a longer decay creep phase before reaching a steady creep state.After one-dimensional creep,an increase in salt content led to a reduction in the number of large and medium pores and an increase in small and micro pores.The pores were predominantly elliptical in shape,exhibiting increased complexity and a tendency toward more complicated structures.Furthermore,the fractal dimension of the pores increased.
sulfate saline soilone-dimensional creepscanning electron microscope(SEM)micro-structure
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