培养液诱导微生物改性粉土的抗剪强度特性研究
PDF下载 (51481)李 洲 1,丁临生 1,2,王 艳 1*.培养液诱导微生物改性粉土的抗剪强度特性研究[J].宁波大学学报(理工版),2017,30(3):76-80.DOI:
LI Zhou 1,DING Lin-sheng 1,2,WANG Yan 1*.Study on shear strength of silty soil modified by microbes induced by culture medium[J].Journal of Ningbo University(Natural Science & Engineering Edition),2017,30(3):76-80.DOI:
| Title: | Study on shear strength of silty soil modified by microbes induced by culture medium |
| 作者: | 李 洲 1, 丁临生 1, 2, 王 艳 1* |
| Author(s): | LI Zhou 1, DING Lin-sheng 1, 2, WANG Yan 1* |
| 关键词: | 改性粉土; 微生物; 抗剪强度; 内摩擦角; 粘聚力 |
| Keywords: | modified silty soil; microbe; shear strength; internal friction angle; cohesion |
| 分类号: | TU431 |
| 文献标识码: | A |
| 摘要: | 通过直剪试验, 研究培养液类型、浓度和培养时间3因素变化时, 微生物对粉土抗剪强度的影响. 通过向土体中注入不同浓度的葡萄糖和淀粉溶液, 对土体进行15、30和60d的培养. 制作环刀试样, 进行直剪试验. 分析发现, 淀粉溶液和葡萄糖溶液培养的微生物均能显著提高粉土的抗剪强度; 相同培养时间下, 培养液浓度增大, 粘聚力和内摩擦角呈增大趋势; 用葡萄糖和淀粉溶液培养60d后, 粉土的粘聚力提高2.38和2.03倍, 内摩擦角扩大了6.54和8.40倍. 实验结果可为微生物改性土工程提供参考. |
| Abstract: | In this paper, direct shear test is conducted to investigate the effect of microbes on the shear strength of silty soil under the conditions with varying culture medium, culture medium concentration and culture time. By injecting different concentrations of glucose and starch solution into the soil, observations after 15 days, 30 days and 60 days of culture are carried out, respectively. As can be seen from direct shear tests, both glucose and starch solution can improve the shear strength of silty soil. Both cohesion and internal friction angle of silty soil show increasing trend along with increasing concentration of culture medium at the same culture time. After cultured by glucose and starch solution for 60 days, the cohesion of silty soil can increase to 2.38 and 2.03 times respectively, and the internal friction angel of silty soil can increase to 6.54 and 8.4 times respectively. The results are expected to provide reference for soil improvement by microbes. |
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| 备注/Memo: | 收稿日期: 2016-11-30. 宁波大学学报（理工版）网址: http://journallg.nbu.edu.cn/ 基金项目: 国家自然科学基金（51678311, 51308310）. 第一作者: 李洲（1994-）, 男, 浙江杭州人, 在读硕士研究生, 主要研究方向: 环境岩土工程. E-mail: 458629028@qq.com *通信作者: 王艳（1985-）, 女, 湖北随州人, 博士/副教授, 主要研究方向: 环境岩土工程. E-mail: wangyan@nbu.edu.cn 宁波大学学报（理工版）网址：http://journallg.nbu.edu.cn/ |
