循环资源地面稳定剂在新万金地区软土地基改良中的现场应用研究

IF 0.4 Q4 ENGINEERING, GEOLOGICAL Journal of the Korean Geosynthetic Society Pub Date : 2020-01-01 DOI:10.12814/JKGSS.2020.19.1.103
Seo. Se Gwan, Kim, You-Seong, Cho, Daesung
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引用次数: 0

摘要

DMM (Deep mixing method)是一种利用螺旋钻开挖地基,再将地基稳定剂与土混合,在软土地基中安装改良桩的施工方法。在软土地基中安装DMM改良桩,其抗压强度随土体性质和特性的不同而不同。在之前的研究中,对利用循环流化床锅炉灰作为促进高炉矿渣碱活化剂研制的DMM地面稳定剂进行了实验室试验。并对试验结果进行了分析,得出了粘结剂单位质量(γB)与单轴抗压强度(qu)之间的相关性。在此次研究中,对从新万金地区收集的土壤材料进行了相同的实验室测试,并对其相关性进行了比较审查,并通过分析在现场进行的测试结果来评估现场的稳定性。因此,新万金地区采集的粘土满足前人研究得出的粘结剂单位质量(γ - b)与单轴抗压强度(qu)之间的相关性。现场试验结果表明,其单轴抗压强度高于现场标准强度,具有良好的稳定性。
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A Study on the Field Application of Ground Stabilizer using Circulating Resource for Improvement of Soft Ground in Saemangeum Area
The DMM (Deep mixing method) is a construction method in which an improved pile is installed in the soft ground by excavation ground using an auger and then mixing ground stabilizer with soil. Improved pile installed in the soft ground by the DMM may have different compressive strength depending on the properties and characteristics of the soil. In the previous study, laboratory tests were performed on the ground stabilizer for the DMM developed by using the ash of the circulating fluidized bed boiler as a stimulator for alkali activation of the blast furnace slag. And the test results were analyzed to derive the correlation between the unit weight of binder (γB) and the uniaxial compressive strength (qu). In this study, comparative reviews were conducted on the correlations derived from the same laboratory tests on soil material collected from the Saemangeum area and the stability of the site was evaluated by analyzing the test results performed at the site. As a result, the clay collected from the Saemangeum area satisfies the correlation between the unit weight of binder (γB) and the uniaxial compressive strength (qu) derived from the previous study. And the result of the test at the field showed a higher uniaxial compressive strength than the standard strength at the field, indicating excellent stability.
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