한국지반신소재학회논문집 (Journal of the Korean Geosynthetics Society)

  • 제8권4호
  • /
  • Pages.9-17
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  • 2009
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  • 2508-2876(pISSN)
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  • 2287-9528(eISSN)
한국지반신소재학회 (Korean Geosynthetics Society)
권호 표지

부등침하 발생 시 SRSL이 적용된 매립지 최종복토층의 침하 특성 검토

Investigation on Differential Settlement Characteristics of the Final Landfill Cover Used SRSL

  • 권오정 (한국해양연구원 연안개발.에너지연구부) ;
  • 오명학 (한국해양연구원 연안개발.에너지연구부) ;
  • 조완제 (단국대학교 토목환경공학과) ;
  • 박준범 (서울대학교 건설환경공학부)
  • Kwon, Oh-Jung (Coastal Engineering & Ocean Energy research Dept., KORDI) ;
  • Oh, Myoung-Hak (Coastal Engineering & Ocean Energy research Dept., KORDI) ;
  • Cho, Wan-Jei (Dept. of Civil & Environmental Engrg., Dankook University) ;
  • Park, Jun-Boum (Dept. of Civil & Environmental Engrg., Seoul National University)
  • 투고 : 2009.10.07
  • 심사 : 2009.12.08
  • 발행 : 2009.12.30
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초록

본 연구는 폐기물 매립지에서 폐기물의 분해 등으로 인해 부등침하가 발생할 경우 SRSL(Self Recovering Sustainable Liner)를 활용한 매립지 최종복토층의 안정성에 미치는 영향을 확인해보는 것을 목적으로 한다. FLAC(Fast Lagrangian Analysis of Continua) 2D 프로그램을 이용하여 폐기물 분해 양상을 빈칸(blank)으로 설정한 후 수치해석을 수행하였으며, 기본 물성치시험 및 문헌조사 등을 통해 각 층에 대한 구성성분의 변수를 산정하였다. 이전 현장투수시험 등을 통해 얻어진 파괴 시 안전균열폭(6mm)을 바탕으로 부등침하 발생 시 부등침하의 폭, 깊이, 개수별 매립지 최종복토층의 침하량을 산정하여 부등침하에 대한 구조적 안정성을 검토하였다. 해석결과, 깊이에 따른 영향은 없으며, 침하갯수가 증가할수록 오히려 매립지 최종복토층에 인장력을 발휘하여 안정성 확보를 유리하게 하며, 부등침하의 폭이 전체길이에 24.5% 이내일 경우 안정성에는 문제가 없는 것을 확인하였다.

This research was intended to verify the stability of landfill final cover using SRSL(Self Recovering Sustainable Liner) with regard to differential settlements due to the degradation of waste and so on in a waste landfill. Numerical analysis was performed using FLAC 2D software program with input parameters based on soil characteristic tests and reference data after the blank was designed in order to represent the decomposition condition of waste. The maximum settlement of landfill cover was calculated to investigate the structural stability of landfill cover with the different condition of settlement width, settlement depth, and number of differential settlements. The allowable maximum deformation rate of SRSL, which was calculated using field permeability tests, was 6 mm. The analysis showed that SRSL was stable in case of a differential settlement width not exceeding 24.5% of total cover width.

키워드

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