Effect of Composite Erosion on Physical Variability of Microbial Solidified Engineering Muck
DOI:
https://doi.org/10.54097/hts5cd51Keywords:
Freeze-thaw cycles; wind erosion; microbiological solidification; physical property; variability.Abstract
To study the influence of freeze-thaw and wind erosion on the physical properties variability of microbiologically solidified engineering soil and further promote the application of Microbially Induced Calcium Carbonate Precipitation (MICP) anti-wind erosion dust technology in seasonal frozen soil areas, freeze-thaw cycling tests and indoor wind tunnel tests after freeze-thaw were carried out on microbiologically solidified engineering soil. Two parameters related to variability analysis (variation and coefficient of variation) were introduced to systematically analyze the physical and mechanical properties indicators of microbiologically solidified engineering soil after different freeze-thaw cycles and wind erosion. The results showed that the combined effects of freeze-thaw and wind erosion on the surface strength of microbiologically solidified soil samples were complex and related to the initial porosity of the engineering soil. With an increase in the number of freeze-thaw cycles, the soil density continuously increased, while the solidified surface thickness gradually decreased. The absolute values of the changes in density, solidified surface thickness, and surface strength of microbiologically solidified engineering soil increased with the increase in the number of freeze-thaw cycles. The coefficients of variation of the density, surface thickness, and surface strength of microbiologically solidified engineering soil under the combined effects of freeze-thaw and wind erosion decreased with the increase in the number of freeze-thaw cycles, and the physical and mechanical properties of microbiologically solidified engineering soil tended to stabilize after undergoing more than 7 freeze-thaw cycles.
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