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将微生物技术引入岩土改性中,筛选出多种碳酸盐矿化菌和多糖黏胶菌,利用碳酸盐矿化菌ATCC64533、和多糖黏胶菌5的代谢产物对粉土的工程性能进行改性,并对改性土体进行渗透和无侧限抗压强度试验,测定土体工程指标的变化。通过扫描电镜(ESEM)分析,研究不同微生物改性粉土的微观结构特征,揭示微生物改性粉土的机理。研究表明,掺碳酸盐矿化菌和多糖黏胶菌对粉土的渗透性和无侧限抗压强度均有不同程度的影响。
The microbial technology was introduced into the geotechnical modification, screening a variety of carbonate mineralization bacteria and polysaccharide mucilage, the use of carbonate mineralization bacteria ATCC64533, and the polysaccharide mucilage 5 metabolites on the performance of silt Modified, and the modified soil infiltration and unconfined compressive strength test, determination of changes in soil engineering indicators. By scanning electron microscopy (ESEM) analysis, the microstructure characteristics of different microbial modified silt were studied to reveal the mechanism of microbial modified silt. The results show that the permeability of carbonate soil and polysaccharide glucoamylase have different degrees of influence on the permeability and unconfined compressive strength of silt.