| Cement-mixed soil and its piles are wildly used in ground treatment, earth-retaining structure, road-bed and so on. Playing important action in engineering, which were mentioned to. However, cement-mixed soil has characteristic task at underground, where groundwater might be corrosive by seawater, sewage of living and erosive environments. Research on various mechanical properties of cement-mixed soil, in particular under the condition of environmental erosion, is one of the basic and preceding subjects in environmental geotechnology currently. It is of theoretical and practical importance to discuss damage evolving process and mechanical property changes of cement-mixed soil in order to build up the corresponding constitutive model for environmental erosion.At first, some solutions were maked up in laboratories to simulate erosion environments. Thereafter, some specimens of cement-mixed soil are cured in the solutions until to schedule time. Reaching the special curing time, the uniaxial, triaxial compression experiments with environmental erosion are co nducted, and the meanwhile corresponding macroscopic processing photos and curves between load and displacement are obtained by high precision digital camera, soil mechanic triaxial instrument and freezing and thawing equipment. In addition, using Rock Meso-mechanical Instrument provided by Wuhan Institute of Rock and Soil Mechanics, China Academy of Sciences, part uniaxial compression meso-failure process and real time observation experiments are done under different environmental condition. Therefore, corresponding stress-strain curves, modulus of elasticity, ultimate strength and other testing results are obtained. And the meantime mesoscopic photos of cement-mixed soil are recorded during microscopic cracking under compression.According to experimental data, the influences of environmental erosion on mechanical properties of cement-mixed soil caused by different pH values, strength of...
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