| 摘要: |
| 利用微生物的酶化作用诱导碳酸钙沉积来修复混凝土裂缝是地下室防渗堵漏的新途径.为推广和检验这项技术，将其应用于某地下室裂缝防渗堵漏工程，提出并采用4项措施：(1)在水平缝外侧做灌浆槽，既保持一定液面高度以维持灌浆压力，又防止菌液和营养盐渗入土中；（2）设计斜向灌注孔，控制竖缝的微生物灌浆质量；（3）在裂缝表面交替涂刷菌液和营养盐溶液；（4）用PVC管向裂缝外土壤实施微生物灌浆.通过注水试验、雨后观察、超声波检测和地质雷达检测等方法对4种堵漏措施的效果进行了检验和评价，结果显示修复效果较好. |
| 关键词: 微生物沉积碳酸钙 堵漏 裂缝 |
| DOI：10.3969/j.issn.1007 9629.2013.04.020 |
| 分类号: |
| 基金项目: |
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| Field Experiment of Crack Repair by Microbiological Precipitation of CaCO3 |
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JIA Qiang, ZHANG Xin, HOU Hong tao, YANG Jin biao
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School of Civil Engineering, Shandong Jianzhu University, Jinan 250013, China
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| Abstract: |
| Crack repair by microbiological precipitation of CaCO3 provides a new method in the seepage and plugging of the underground engineering. A field experiment was designed to verify its efficiency. Four measures were taken.(1)The trough outside horizontal crack can prevent seriflux from penetrating into the soil, and the grouting pressure can be obtained by liquid height.(2)The slant holes were drilled to grout the vertical crack.(3)Bacteria liquid and urea Ca(NO3)2 solution were brushed on the surface of the crack by turns.(4)The mechanical drilling and the PVC pipes were chosen for grouting in soil. The repair effect were tested and evaluated by test of injecting water, observation after the rain, ultrasonic testing and geological radar detection，and the results show that the repair is efficient. |
| Key words: microbiological precipitation of CaCO3 plugging crack |
