MICP技术加固红黏土表面的抑尘性能与植物适生性OA

Urbanization has led to severe fugitive dust pollution,which threatens residents' health and damages urban infrastructure.Microbial induced carbonate precipitation(MICP)is a technique that can solidify soil to address fugitive dust issues in engineering construction.In this study,wind erosion tests and grass planting tests were conducted on red clay solidified by MICP to investigate the effects of cementing solution concentration on soil solidification and plant growth.The results are as follows:① MICP technology can significantly improve the wind erosion resistance of red clay.After 360 minutes of wind erosion,the minimum mass loss rate of reinforced soil samples is reduced to 1.41％,which is much lower than 12.14％of unreinforced soil.② There is a non-linear relationship between cementing solution concentration and soil mass loss rate,with the optimal effect achieved at 1 mol/L.(3)In terms of plant growth,the germination rate of grass seeds decreases with the increase of cementing solution concentration,and high-concentration cementing solution inhibits plant growth.④ MICP technology generates calcium carbonate precipitation through bacterial metabolism,optimizes soil structure,and thus achieves dust suppression and affects plant growth.This study confirms the potential of MICP technology in the synergistic application of red clay dust suppression and vegetation slope protection,providing theoretical basis and technical reference for its practical engineering application.Further optimization of technical parameters can be carried out to promote its wide application in the future.