Permeability Reduction and Electrochemical Impedance of Fractured Rock Grouted by Microbial-Induced Calcite Precipitation
文献类型：期刊论文
| 作者 | Peng, Shuquan2; Zhang, Kejia2; Fan, Ling2; Kang, Jingyu1,3; Peng, Kang2; Wang, Fan2 |
| 刊名 | GEOFLUIDS
 |
| 出版日期 | 2020-12-08 |
| 卷号 | 2020期号:-页码:11 |
| ISSN号 | 1468-8115 |
| DOI | 10.1155/2020/8876400 |
| 英文摘要 | The poor impermeability of fractured rock induced by excavation and construction is improved through the application of microbial-induced calcite precipitation (MICP), but it is difficult to monitor and evaluate the permeability reduction under a confining pressure and fracture aperture. For this, the grouting ratio, permeability, and electrochemical impedance of fractured rock with MICP grouting were experimented with, considering the effects of fracture aperture and confining pressure. The equivalent circuit model of grouting-fractured rock is presented, and the corresponding ratio of the electrical resistivity and cross-sectional area of the grouted fracture (rho/S) is indicated by an electrochemical impedance spectroscope (EIS). The relationships of the permeability coefficient, the rho/S, and the grouting ratio are analysed. The experimental results show that the Darcy permeability coefficient of fractured rock with MICP grouting is reduced by an order of magnitude of 3 to 4. As fracture aperture ranged from 1.28 to 2.56 mm and grouting rate was 0.003 ml/s, the Darcy permeability coefficient decreased with an increase in confining pressure. The grouting ratio and fracture aperture also decreased with a reduction in rho/S. The results also showed that the permeability reduction of MICP correspondingly increased in these conditions. What is more, the Darcy permeability coefficient of fractured rock grouted by MICP and its permeability reduction may be well predicted by confining pressure and rho/S. This study provides a new EIS method for predicting the reduction in permeability of MICP grouting-fractured rock and further enriches the application of MICP and EIS techniques in impermeable rock engineering. |
| 资助项目 | National Natural Science Foundation of China[51674287] ; National Natural Science Foundation of China[51508579] ; National Natural Science Foundation of China[51974043] ; National Natural Science Foundation of China[51774058] ; Chongqing Basic and Frontier Research Project[cstc2018jcyjA3320] |
| WOS研究方向 | Geochemistry & Geophysics ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000601178200004 |
| 出版者 | WILEY-HINDAWI |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/25331]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 2.Cent South Univ, Sch Resource & Safety Engn, Changsha 410083, Hunan, Peoples R China 3.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Peng, Shuquan,Zhang, Kejia,Fan, Ling,et al. Permeability Reduction and Electrochemical Impedance of Fractured Rock Grouted by Microbial-Induced Calcite Precipitation[J]. GEOFLUIDS,2020,2020(-):11. |
| APA | Peng, Shuquan,Zhang, Kejia,Fan, Ling,Kang, Jingyu,Peng, Kang,&Wang, Fan.(2020).Permeability Reduction and Electrochemical Impedance of Fractured Rock Grouted by Microbial-Induced Calcite Precipitation.GEOFLUIDS,2020(-),11. |
| MLA | Peng, Shuquan,et al."Permeability Reduction and Electrochemical Impedance of Fractured Rock Grouted by Microbial-Induced Calcite Precipitation".GEOFLUIDS 2020.-(2020):11. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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