Microbial carbonate precipitation as a soil improvement technique
Microbial carbonate precipitation as a soil improvement technique
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DOI：
10.1080/01490450701436505
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发表时间：
2007-01-01
影响因子：
2.3
通讯作者：
Harkes, Marien P.
中科院分区：
文献类型：
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作者：
Whiffin, Victoria S.;van Paassen, Leon A.;Harkes, Marien P.
为了评估MCP作为土壤强化过程，在对于现场应用而言现实的条件下用细菌和试剂处理5米的砂柱。在该过程中监测注入和反应参数，并且细菌和工艺试剂可以在低压（水力梯度< 1;流速约为7 m/天）下在整个柱长度上注入，而不会导致材料堵塞。处理后，柱进行了机械测试，这表明在几米的强度和刚度的显着改善。碳酸钙在整个五米处理长度上沉淀。用微生物碳酸盐沉淀显示了土壤的承载能力的改善，而不使土壤对流体不可渗透，与目前可用于地下的替代土壤处理方法相比，这是一种独特的性质。
In order to evaluate MCP as a soil strengthening process, a five meter sand column was treated with bacteria and reagents under conditions that were realistic for field applications. The injection and reaction parameters were monitored during the process and both bacteria and process reagents could be injected over the full column length at low pressures ( hydraulic gradient < 1; a flow rate of approximately 7 m/day) without resulting in clogging of the material. After treatment, the column was subjected to mechanical testing, which indicated a significant improvement of strength and stiffness over several meters. Calcium carbonate was precipitated over the entire five meter treatment length. Improvement of the load bearing capacity of the soil without making the soil impermeable to fluids was shown with microbial carbonate precipitation, and this is a unique property compared to alternative soil treatment methods that are currently available for use in the subsurface.