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2022 Vol.21, Issue 2

Research Article

Analysis of the Long-term Settlement Behavior Due to the Additional Embankment on the Waste Lime Landfill in Public Waters Reclaimed Land

공유수면 매립지내 폐석회 매립시설의 추가성토에 따른 장기침하 거동 분석

Jeong Ku Kang1*
,
Yeun Jeung Yi2
강 정구1*
,
이 연정2
1Member, Adjunct Professor, Dept. of Civil and Environmental Engineering, College of Urban Science, Incheon National Univ., 119 Academy-ro, Yeonsu-gu, Incheon 22012, Republic of Korea
2Non-Member, Ph. D. Candidate, Dept. of Civil and Environmental Engineering, College of Urban Science, Incheon National Univ., 119 Academy-ro, Yeonsu-gu, Incheon 22012, Republic of Korea
*Corresponding Author
30 June 2022. pp. 1-9
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Abstract

Recently, the reclamation of public waters has been on a downward trend due to environmental problems, but there is a limitation to evaluating environmental characteristics index uniformly. In this study, the stability of settlement behavior on public waters reclaimed land was analyzed using the experimental test. From the primary consolidation influence factors, the characteristics of the waste lime was similar that of clay in process of consolidation. Assuming that the waste lime landfill is the layer reinforced with thin geosynthetic reinforcement, the settlement was predicted by calculating the amount of increase using the Westergaard method. As a result of predicting settlement with degree of consolidation, it was found that the increase in stress was reduced by 40% when the surface layer of the soft ground was reinforce with geotextiles compared to the case where it was not reinforced. In addition, the consolidation behavior characteristics of clay and waste lime were compared using the correlation between the plasticity index and internal friction angle of waste lime. Since the waste lime in the public process of consolidation, it was predicted that long-term settlement will increase further.

Keywords
Public waters reclaimed land
Settlement
Waste lime
Embankment
Degree of consolidation

최근 환경적 문제로 공유수면 매립사업이 감소추세에 있으나 매립사업의 특성상 일률적인 지표로 환경성을 평가하는 데 한계가 있다. 이 연구에서는 공유수면 매립지의 토질역학적 침하거동 인자를 활용하여 폐석회 매립시설의 침하 안정성을 분석하였다. 1차 압밀특성 인자로부터 폐석회는 압밀이 진행중인 점토특성과 유사함을 확인하였다. 매립지 지층을 얇은 토목섬유 보강재로 보강된 층상구조로 가정하고, Westergaard 방법에 따른 응력증가량을 이용하여 침하량을 예측하였다. 압밀도에 따른 침하량을 예측한 결과 연약지반의 표층이 토목섬유로 보강된 경우 보강되지 않은 경우보다 응력증가량이 40% 감소하는 것으로 나타났다. 또한, 폐석회의 소성지수와 내부마찰각의 상관관계를 이용하여 점토와 폐석회의 압밀거동 특성을 비교하였다. 공유수면 매립지내 폐석회는 압밀이 진행중인 상태이므로 장기적으로 침하는 더 증가하는 경향을 보일 것으로 예측되었다.

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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 : 21
  • No :2
  • Pages :1-9
  • Received Date : 2022-05-17
  • Revised Date : 2022-05-26
  • Accepted Date : 2022-05-26
  • DOI :https://doi.org/10.12814/jkgss.2022.21.2.001
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