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http://dx.doi.org/10.7843/kgs.2019.35.8.5

Proper Regulation of the Cutoff System in Offshore Landfill Built on Clay Ground with Double Walls  

Hwang, Woong-Ki (Geo R&D Co., Ltd.)
Kim, Hyang-Eun (Geo R&D Co., Ltd.)
Choi, Hoseong (Dept. of Civil and Environmental Engrg., Korea Maritime and Ocean Univ.)
Kim, Tae-Hyung (Dept. of Civil Engrg., Korea Maritime and Ocean Univ.)
Publication Information
Journal of the Korean Geotechnical Society / v.35, no.8, 2019 , pp. 5-15 More about this Journal
Abstract
This study was conducted to propose a reasonable requirement regulation of cutoff barriers composed of bottom layer and vertical barrier of offshore landfill for the prevention of contaminant leakage. The bottom layer was composed of impermeable clay layer; vertical walls were composed of double walls; outer wall was composed of steel sheet pile which registed against outer force; cutoff vertical barrier took the role of inner wall. Seepage-advection-dispersion numerical analysis was conducted using SEEP/W and CTRAN/W programs under steady and unsteady flows. The results showed that the values calculated under steady flow showed higher migration of pollutant than those of unsteady flow. The values calculated under steady flow are more valid from a design point of view. Under steady flow and the bottom clay layer and when the vertical barrier are homogeneous and completely well installed, respectively, the minimum required cutoff regulations for hydraulic conductivity, thickness, and embedded depth of the bottom clay layer and vertical barrier were suggested.
Keywords
Offshore landfill; Cutoff system; Bottom layer; Vertical Barrier; Steady and unsteady flows;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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