| 生物改性对粉土工程性质影响的研究 |
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| 引用本文： | 许朝阳,张莉.生物改性对粉土工程性质影响的研究[J].工业建筑,2009,39(3). |
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| 作者姓名： | 许朝阳 张莉 |
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| 作者单位： | 1. 扬州大学建筑科学与工程学院,江苏扬州,225009;同济大学地下建筑工程系,上海,200092
2. 扬州大学建筑科学与工程学院,江苏扬州,225009 |
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| 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。
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| 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 |
RESEARCH ON EFFECT OF MICROBES ON SOME ENGINEERING PROPERTIES OF SILT |
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| Xu Zhaoyang,Zhang Li.RESEARCH ON EFFECT OF MICROBES ON SOME ENGINEERING PROPERTIES OF SILT[J].Industrial Construction,2009,39(3). |
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| Authors: | Xu Zhaoyang Zhang Li |
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| Abstract: | 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 microstructures 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. |
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| Keywords: | silt microbe permeability coefficient unconfined compressive strength microstructure modification mechanism |
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