摘要
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 microbiology is introduced in foundation treatment. Several carbonate-mineralization microbes and polysaccharides viscose microbes are screened and isolated, and microbes ATCC6453, No. 3 and No. 5 are used in silt modification. Engineering properties of silt before and after modification are compared by unconfined compressive strength test and indoor seepage test. The microstruetures of silt incorporating different microbes are analysed by mean of scanning electron microscope, the modification mechanism of silt is revealed. These studies indicate that certain engineering properties of silt can be improved by incorporating microbes.
出处
《工业建筑》
CSCD
北大核心
2009年第3期60-63,38,共5页
Industrial Construction
关键词
粉土
微生物
渗透系数
无侧限抗压强度
微观结构
改性机理
silt
microbe
permeability coefficient
unconfined compressive strength
microstructure
modification mechanism
