Analysis on Seepage Behavior According to Extended length of HDPE Sheet of Rubble Mound Revetment at Offshore Landfill

Myoung-hak  Oh; Hae-yong  Park; O-soon  Kwon

doi:10.12814/jkgss.2016.15.3.039

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2016 Vol.15, Issue 3 Preview Page Next Page

Analysis on Seepage Behavior According to Extended length of HDPE Sheet of Rubble Mound Revetment at Offshore Landfill 해상 폐기물매립지 경사식 호안에서의 차수시트 설치에 따른 침투거동 분석

30 September 2016. pp. 39-47

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Abstract

In order to prevent leakage of leachate in offshore landfill, hydraulic barrier is indispensable. In the case of rubble mound revetment at offshore landfill, HDPE sheet in slope should be installed. In this study, seepage analysis were performed to evaluate seepage and flow in the seabed and revetment according to extended length of HDPE sheet by using SEEP/W. Results show that, in the case of low permeability layer is distributed where extended length of HDPE sheet was more than 1m, seepage flux in seabed and revetment was greatly reduced. In order to prevent seepage in seabed and revetment in the case of sand layer of high permeability is existed above low permeable layer, extended length of HDPE sheet and impermeable improvement width of permeable layer should be more than 1m at seabed.

Keywords

Offshore landfill

Seepage analysis

HDPE sheet

SEEP/W

해상 폐기물매립지에서 내부 침출수의 외부 유출을 방지하기 위하여 차수공이 필수적으로 요구된다. 이를 위해 경사식 호안의 경우에는 사면부에 차수시트가 설치된다. 사면부에 설치된 차수시트의 하부 지반에서의 연장설치범위에 따른 침투차단효과를 평가하기 위하여 SEEP/W를 이용하여 침투해석을 실시하였다. 해석결과, 해저지반에 저투수성 지층이 분포되어 있으면 차수시트를 호안 사면끝단으로부터 점토층 상부면으로 1m 이상 연장하여 설치하여야 침투방지에 효과가 있는 것으로 나타났다. 하부지반에 투수성이 큰 사질토층이 존재하는 경우에는 폭 1m 이상을 저투수성으로 개량하고 차수시트를 1m 이상 연장하여 설치하는 것이 효과적인 것으로 나타났다.

References

1.Chae. G. S., Lee, S. P. and Oh, M. (2011), 해상 폐기물매립장의 설계 및 시공 기술, Korean Geosynthetics Society, Vol.10, No.4, pp.16-24 (in Korean).

2.Han, J. S. (1998), 지하수 환경과 오염, 박영사, pp.115 (in Korean).

3.Kwon, O., Oh, M. and Chae, G. S. (2012), 관리형 폐기물 매립호안 설계․시공․관리 매뉴얼, 도서출판 씨아이알, pp.65-66, pp.168-170 (in Korean).

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5.Park, H. Y. and Oh, M., Kwon, O. (2016), Analysis on Contaminant Transport according to the Embedded Depth of Vertical Barrier of Offshore Landfill, Journal of the Korean Geo-Environmental Society, Vol.17, No.8, pp.29-37 (in Korean).

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8.Yoo, J. J. and Lee, Y. S. (2014), 폐기물 매립시설의 HDPE 차수시트 시공관리, Korean Geosynthetics Society, Vol.13, No.3, pp.15-19 (in Korean).

Information

Publisher :Korean Geosythetics Society
Publisher(Ko) :한국지반신소재학회
Journal Title :Journal of the Korean Geosynthetics Society
Journal Title(Ko) :한국지반신소재학회 논문집
Volume : 15
No :3
Pages :39-47
Received Date : 2016-08-02
Revised Date : 2016-08-18
Accepted Date : 2016-09-02
DOI :https://doi.org/10.12814/jkgss.2016.15.3.039

Journal of the Korean Geosynthetics Society ISSN:2508-2876(Print) 2287-9528(Online) 한국지반신소재학회 논문집

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