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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of the Korean Geosynthetic Society
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Journal DOI :
Korean GeoSynthetics Society
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Volume & Issues
Volume 5, Issue 4 - Dec 2006
Volume 5, Issue 3 - Sep 2006
Volume 5, Issue 2 - Jun 2006
Volume 5, Issue 1 - Mar 2006
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Numerical Analysis of Effects of the Physical Properties of Soil and Contaminant Materials on In-situ Soil Remediation Using Vertical Drain
Lee, Haeng-Woo ; Chang, Pyoung-Wuck ;
Journal of the Korean Geosynthetic Society, volume 5, issue 2, 2006, Pages 1~8
The properties of contaminated soil, contaminants and elapsed time are important considering factors to in-situ soil remediation. Gabr et. al. (1996) derived the solution equation of contaminant concentration ratio as initial one (
) with time and spatial changes in contaminated area which are embedded with vertical drains. The contaminant concentration ratio (
) is analyzed with time and spatial changes as varying the effective diameter, porosity, shape factor, density of contaminated soil, temperature in ground, unit weight and viscosity of contaminants by using FLUSH1 model modified from FLUSH. Results from numerical analysis indicate that the most important factor to the in-situ soil remediation in vertical drain system is the effective diameter of contaminated soil. It also shows that the next important factors are the viscosity of contaminants, porosity of soil, shape of soil, temperature in ground, unit weight of contaminants and density of soil, in order. However, the others except the effective diameter of contaminated soil are insignificant to the soil remediation.
Deformation analysis of Excavated Behind Ground by The Artificial Displacement Method (I) - Program Development and Verification -
Yun, Jung-Mann ; Han, Jung-Gun ;
Journal of the Korean Geosynthetic Society, volume 5, issue 2, 2006, Pages 9~15
The numerical analysis program using artificial displacement method is developed to analyze the deformation behavior of excavated behind ground of retention wall. The elasto-plastic model suggested by Drucker-Prager was used to represent soil behavior and the model's solution was obtained from the return mapping method. To validate of the program, the predicted results by the numerical analysis and the measured results by a field test are compared. The results of numerical analysis showed good agreement with the measured results in field and theoretical values.
Electrokinetic Extraction of Pollutants from the Vicinity of Unregulated Landfill Site
Lee, MyungHo ; Chung, Ha-Ik ;
Journal of the Korean Geosynthetic Society, volume 5, issue 2, 2006, Pages 17~22
This paper presents preliminary field investigations on the electrokinetic (EK) remediation coupled with permeable reactive barrier (PRB) system. unregulated and old-fashioned landfills are one of the primary contributors to various contaminated soil problems. In-situ EK remediation technology has been successfully applied to the environs of unregulated landfill site, located in Kyeong-Ki province, Korea. Atomizing slag was adopted as a PRB reactive material for the remediation of groundwater contaminated with inorganic and/or organic substances. From the preliminary investigations, the coupled technology of EK with PRB system would be effecitve to remeidate contaminated grounds without the extraction of pollutants from subsurface due to the reactions between the reactive materials and contaminants.
Analytical Study on the Isolation Effects of Bore Holes by Materials
Lee, Kang-Il ;
Journal of the Korean Geosynthetic Society, volume 5, issue 2, 2006, Pages 23~30
This paper aims at investigating the material and dimensions of a wall barrier such as installation depth, thickness, and distance from vibration source by means of finite element method (FEM). In this study, various materials such as concrete, EPS, and steel were adopted. The results showed that the efficiency of a wall barrier appears to be more dependent on installation depth than thickness. In addition, a concrete wall barrier is less efficient than any other wall barrier. In contrast, EPS wall barriers seem to be much sensitive to the wall thickness than the depth.
A Study of Dewatering and Filtration on Woven Geotextile Tube
Kim, Tae-Hyung ; Jung, Soo-Jung ;
Journal of the Korean Geosynthetic Society, volume 5, issue 2, 2006, Pages 31~37
The purposes of this paper are to study the use possibility of geotextile tubes for dewatering of high water content sludges and sediments and to evaluate affecting factors on dewatering. To do this, pressure filtration tests are conducted on four high water content materials with two geotextiles under two filtration pressures. Based on the test results, although woven geotextile tubes are not satisfied the soil retention criteria used in filter design commonly, a great portion of fines are retained by filter cake formation on geotextile tube's upstream side, but also after formation of filter cake, the permeability drops sharply. Higher filtration pressure tends to increase dewatering rate, but has very little effect on filtration efficiency. Dewatering capacity is affected by several factors which are related to the geotextile, but the property of sludge appears to be the dominant control factor for dewatering efficiency.
Effect of Synthetic MSW Leachate on Chemical Compatibility of PVC Geomembrane
Choi, Hangseok ;
Journal of the Korean Geosynthetic Society, volume 5, issue 2, 2006, Pages 39~44
The resistance of flexible PVC geomembranes to leachate chemicals is an important factor when PVC geomembranes are being considered as a barrier layer in a composite liner system. This paper describes laboratory test results that evaluate the chemical compatibility of a 0.76 mm (30 mil) thick flexible PVC geomembrane exposed to a synthetic municipal solid waste (MSW) leachate. Changes in dimensional, physical, and mechanical properties were measured after exposure to the synthetic MSW leachate at
for 30, 60, 90, and 120 days. Although some variability of the test results is observed due to experimental factors and product variability, the synthetic MSW leachate did not significantly degrade the physical or mechanical properties of the flexible PVC geomembrane. As a result, this paper will conclude the PVC geomembranes are not adversely affected by the synthetic MSW leachate.
A Pilot Test of Various Vertical Drains and its Initial Monitoring Results
Kim, Ju-Hyong ; Cho, Sam-Deok ;
Journal of the Korean Geosynthetic Society, volume 5, issue 2, 2006, Pages 45~50
Although the discharge capacity of the natural fiber drains are very low compared to that of plastic drain board (PDB), it is found that the conventional fiber drains and the new developed straw drain boards have great potential for use as a substitute for conventional plastic drain boards through several model tests. To verify their field application, a pilot test using environmentally friendly drains is also being carried out to prove their effective discharge capacity in the field. The pilot test site was divided into 5 different areas, with various combinations of vertical and horizontal drains installed for evaluation. Definite characteristics of various drains are still to be found due to the delay in construction of embankment. Consolidation behavior of three types of vertical drains and two types of horizontal drains will be analyzed after the completion of the embankment in the near future.