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2026 Vol.27, Issue 10 Preview Page
A Study on the Characteristics of Settlement Behaviour under Various Conditions in Soft Ground along the West Coast of Korea

서해안 연약지반의 다양한 조건에 대한 침하 거동의 특성 연구

Hoyeol Son1
,
Jaehyun Kim2
,
Youngjin Jeon3
,
Gooseong Lee4
,
Sungwan Park5
,
Cheolju Lee6*
손 호열1
,
김 재현2
,
전 영진3
,
이 구성4
,
박 성완5
,
이 철주6*
1Senior Manager, Korea Water Resources Corporation
2Assistant Professor, Department of Civil Engineering, Kangwon National University
3Senior Researcher, Institute of Industrial Technology, Kangwon National University
4General Manager, Korea Water Resources Corporation
5Executive Director, Water Supply & Sewage Project Office, Goyang Special City
6Department of Civil Engineering, Kangwon National University
*Corresponding Author
1 October 2026. pp. 13-26
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Abstract

This study compared and analysed the settlement behaviour of improved soft ground under different drainage and embankment conditions using field monitoring data and numerical analysis results. Settlement and elapsed time were normalised by the final settlement and the total elapsed time, respectively, to investigate differences in consolidation behaviour. The results showed that approximately 70–80% of the final settlement occurred within a normalised time of 0.4 in both the plastic board drain (PBD) section and the natural drainage section. In the natural drainage section, more than 60% of the final settlement occurred within a normalised time of 0.2, while approximately 55–58% of the total settlement developed during the high embankment stage. The field monitoring data indicated that consolidation settlement continued during the later stages of consolidation following the high embankment stage, whereas the numerical analysis predicted that most settlement occurred during the early stages and subsequently converged rapidly. These findings suggest that the settlement behaviour of soft ground should be evaluated not only in terms of the final settlement but also by taking into account drainage conditions, embankment history, and the time-dependent characteristics of consolidation.

Keywords
Soft ground
Settlement behaviour
Drainage condition
Embankment condition
Field measurement
Numerical analysis

본 연구는 연약지반 개량 구간에 대해 배수 조건과 성토 조건에 따른 침하 거동 특성을 현장 계측 자료 및 수치해석 결과를 이용하여 비교·분석하였다. 침하량 및 경과시간은 각각 최종 침하량과 최종 경과시간으로 정규화하여 압밀 거동의 차이를 검토하였다. 분석 결과 PBD 구간과 자연배수 구간 모두 최종 침하량의 약 70~80%가 정규화 시간 0.4 이내에서 발생하였다. 자연배수 구간은 정규화 시간 0.2 이내에 최종 침하량의 60% 이상이 집중되는 특성을 보였으며, 전체 침하량의 약 55~58%가 고성토 단계에서 발생하는 것으로 나타났다. 계측 결과에서는 고성토 단계 이후의 압밀 후반부에도 압밀에 의한 침하가 지속되었으나 수치해석 결과에서는 대부분의 침하가 초기 단계에서 발생한 후 빠르게 수렴하는 경향을 보였다. 이러한 결과는 연약지반의 침하 거동은 최종 침하량만으로 평가하기보다 배수 조건, 성토 이력 및 시간 의존적 압밀 특성을 함께 고려하여 해석할 필요가 있다는 점을 보여준다.

키워드
연약지반
침하 거동
배수 조건
성토 조건
현장 계측
수치해석
References
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2

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Information
  • Publisher :Korean Geo-Environmental Society
  • Publisher(Ko) :한국지반환경공학회
  • Journal Title :Journal of the Korean Geo-Environmental Society
  • Journal Title(Ko) :한국지반환경공학회 논문집
  • Volume : 27
  • No :10
  • Pages :13-26
  • Received Date : 2026-07-13
  • Revised Date : 2026-08-05
  • Accepted Date : 2026-09-14
  • DOI :https://doi.org/10.14481/jkges.2026.27.10.13
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