Experimental Study on Soft Ground with DCM Column

IF 0.4 Q4 ENGINEERING, GEOLOGICAL Journal of the Korean Geosynthetic Society Pub Date : 2020-09-01 DOI:10.12814/JKGSS.2020.19.3.035
G. Hong
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引用次数: 2

Abstract

This study described the result of laboratory model tests, in order to compare the improvement effect of the DCM column installed on the soft ground according to DCM column type. In the laboratory model test, the non-reinforced type and the 3 types of DCM column were applied, and the behavior (settlement, lateral flow) of soft ground was evaluated under the surcharge load condition for each type. The settlement evaluation result showed that the settlement of soft ground without DCM column occurred rapidly under the low load condition, but the settlement of the soft ground with the DCM column had relatively small settlement. The evaluation result of lateral flow in the soft ground showed that the soft ground with DCM column had lower lateral displacement than the soft ground without DCM column. Especially, the lateral displacement under the same load condition decreased in the order of pile type, wall type, and grid type. Therefore, it confirmed that the improvement effect of soft ground was excellent when the DCM of grid type was applied for settlement and lateral flow.
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DCM柱在软土地基中的试验研究
本文对室内模型试验结果进行了描述,以比较不同类型DCM柱安装在软土地基上的改善效果。在室内模型试验中,采用无加筋型和3种DCM柱,对每种类型的附加荷载条件下软土地基的沉降、侧向流动特性进行了评价。沉降评价结果表明,无DCM柱的软土地基在低荷载条件下沉降迅速发生,而有DCM柱的软土地基沉降相对较小。软土地基横向流动评价结果表明,有DCM柱的软土地基横向位移小于无DCM柱的软土地基;特别是在相同荷载条件下,桩型、墙型、网架型的侧移量依次减小。因此,证实了采用栅格式DCM进行沉降和侧流处理对软土地基的改善效果是很好的。
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