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2021 Vol.20, Issue 4 Preview Page

Research Article

A Study on Behavior Characteristics of Soft Ground by DCM Arrangement Type

DCM 배치 형상에 따른 연약지반 거동 특성에 관한 연구

Seung-Kyong You1
,
Jong-Young Lee2
,
Gigwon Hong3*
유 승경1
,
이 종영2
,
홍 기권3*
1Member, Professor, Dept. of Civil Engineering, Myongji College, 134 Gajwa-ro, Seodaemun-gu, Seoul 03656, Republic of Korea
2Member, Research Professor, Department of Civil and Environmental Engineering, Chung-Ang Univ., 84 Heukseok-Ro, Dongjak-gu, Seoul 06974, Republic of Korea
3Member, Assistant Professor, Dept. of Civil and Disaster Prevention Engineering, Halla University, 28 Halladae-gil, Wonju-si, Gangwon-do 26404, Republic of Korea
*Corresponding Author
31 December 2021. pp. 125-131
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Abstract

This study described the relationship of settlement-lateral displacement and settlement-heaving according to the DCM type using the model test results, in order to evaluate the behavioral characteristics of the soft ground improved with DCM. As a result, it was found that the total settlement of the model ground was relatively small in the soft ground, to which the DCM was applied, and the settlement was less in the order of the grid type, wall type, and pile type under the same load conditions. This trend was also the same for the lateral displacement and heaving. In addition, the relationship between settlement and lateral displacement of soft ground was analyzed to be similar to that of previous study (Leroueil et al., 1990). Therefore, the DCM of grid type was evaluated to be superior to other types for lateral flow and heaving in the improvement effect of soft ground.

Keywords
Deep cement mixing (DCM)
Soft ground
Settlement
Lateral displacement
Heaving

본 연구에서는 DCM으로 보강된 연약지반의 거동특성을 평가하기 위하여, 모형실험결과를 이용하여 DCM 배치 형상에 따른 침하-측방변위, 침하-융기 관계를 분석하였다. 그 결과, 모형지반의 지표면 누적 침하 거동은 DCM이 적용된 지반에서 상대적으로 침하가 적게 발생하였고, 격자식, 벽식, 말뚝식의 순으로 동일한 하중조건에서 침하량이 적게 발생한 것을 알 수 있었다. 이와 같은 경향은 측방변위량과 융기량에 대해서도 동일하게 나타난 것을 확인하였다. 연약지반의 침하와 측방유동의 관계를 분석한 결과, 기존 연구(Leroueil et al., 1990)와 유사한 거동을 보이는 것으로 확인되었다. DCM 배치 형상에 따른 지반개량효과를 평가한 결과, 측방유동과 지반 융기에 대하여 격자식 보강이 벽식 및 말뚝식 보강에 비해 탁월한 지반개량효과를 보유한 것으로 평가되었다.

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Information
  • Publisher :Korean Geosythetics Society
  • Publisher(Ko) :한국지반신소재학회
  • Journal Title :Journal of the Korean Geosynthetics Society
  • Journal Title(Ko) :한국지반신소재학회 논문집
  • Volume : 20
  • No :4
  • Pages :125-131
  • Received Date : 2021-12-12
  • Revised Date : 2021-12-15
  • Accepted Date : 2021-12-17
  • DOI :https://doi.org/10.12814/jkgss.2021.20.4.125
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