수치해석을 통한 해상처분장 연직차수공 안정성 및 지반 내 흐름특성 평가 KCI

Title
수치해석을 통한 해상처분장 연직차수공 안정성 및 지반 내 흐름특성 평가
Alternative Title
Numerical Analysis on the Flow and Stability of Vertical Hydraulic Barrier at Offshore Containment Facility
Author(s)
채광석; 오명학
KIOST Author(s)
Oh, Myounghak(오명학)
Alternative Author(s)
오명학
Publication Year
2021-04
Abstract
Preventing leakage and structural stability of vertical barrier at offshore containment facilities are very important. Two-dimensional numerical analysis were performed to evaluate seepage and flow characteristics regarding to different embedded depths and hydraulic permeability of vertical barrier. In addition, stress and displacement at corner of vertical barrier were evaluated by using 3-dimensional numerical analysis. The effluent flux in the case of vertical barrier with insufficient embedded depth was significantly increased by 200 ~ 240 times compared with the case of embedded barrier in low permeable clay layer. The effluent flux was increased by 4.5 and 45 times according to 10 and 100 times increase of hydraulic permeability of vertical barrier, respectively. The seepage and flow analysis results imply that the most important factor to prevent leakage is to embed the vertical barrier in low permeable layer. The 3-dimensional stress and displacement analysis results showed small displacement but large moment and shear stress at the corner of vertical barrier. Therefore, the stiffness and strength at the corner of vertical barrier compared with other parts should be increased to secure stability of vertical barrier at offshore disposal facilities.
ISSN
2288-7903
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/41318
DOI
10.20481/kscdp.2021.8.2.69
Bibliographic Citation
한국연안방재학회지, v.8, no.2, pp.69 - 78, 2021
Publisher
(사)한국연안방재학회
Keywords
offshore containment facility; waste disposal; vertical hydraulic barrier; PLAXI
Type
Article
Language
Korean
Publisher
(사)한국연안방재학회
Related Researcher
Research Interests

Marine geotechnics,Geoenvironmental Engineering,offshore foundation,해양지반공학,지반환경공학,해양구조물 기초

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