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引用次数: 4
摘要
微生物诱导方解石沉淀(MICP)是一种利用自然生物地球化学过程提高砂土强度和刚度的新型地基改良方法。本文介绍了MICP技术在边坡治理中的应用。在实验室对条形基础进行1.5H: 1V砂坡模型荷载试验。以100 mm × 100 mm的网格模式注射细菌(S. Pasteurii)和胶结液(CaCl2 +尿素)，浓度为2M。这些斜坡被允许在14天和28天的潜伏期内固化。在距离坡顶0B、B和2B处的三个边缘基础位置进行荷载试验。结果表明:经MICP处理后，边坡基础承载力显著提高;固化28 d的边坡承载力最大。
Microbial-induced calcite precipitation (MICP) is a novel ground improvement method to increase strength and stiffness of sand using natural biogeochemical processes. This paper describes the application of MICP in slope improvement. A strip footing was tested in a laboratory by conducting a model load test on sand slope of 1.5H: 1V. The slope was treated by injecting bacteria (S. Pasteurii) and cementation solution (CaCl2 + Urea) at 2M concentration in a grid pattern of 100 mm x 100 mm. These slopes were allowed to cure for the incubation period of 14 and 28 days. The load tests were conducted for three locations of footing on edges at a distance measured from slope crest as 0B, B and 2B. The results indicated that the bearing capacity of footing on slope increased significantly after MICP treatment. The bearing capacity of slopes cured for 28 days was found to be maximum.
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