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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of the Korean Geosynthetic Society
Journal Basic Information
Journal DOI :
Korean GeoSynthetics Society
Editor in Chief :
Volume & Issues
Volume 6, Issue 4 - Dec 2007
Volume 6, Issue 3 - Sep 2007
Volume 6, Issue 2 - Jun 2007
Volume 6, Issue 1 - Mar 2007
Selecting the target year
A Study on the Strength Degradation of Weathered Granite Soil by Freezing and Thawing
Kim, Yong-Soo ; Jung, Soo-Jung ;
Journal of the Korean Geosynthetic Society, volume 6, issue 3, 2007, Pages 1~7
The property of weathered soil cannot but have a possibility of having a limit when its precise approaching due to the various weathering environment, and the peculiarity of its conduct affected by the weathering degree and effect factors. Especially most domestic or international researches are concentrated on the sedimentary soil, trying to analyze the mechanical behavior of weathered soil from the viewpoint of sedimentary soil. Therefore, it's difficult to judge if those results meet the actual conduct of weathered soil. This study suggested a way of weathering degree changing experiment as an early stage in an experiment of artificially changing weathering degree. In order to find out the property of strength change by the change of weathering degree, indoor mechanical experiment was made using soil sample after freezing and thawing. Under the weathering degree, characteristic change is watched by country rock and region of weathered granite soil.
Implementation of Infinite Boundary Condition Considering Superposed Theory on SVE Remediation System
Park, Jeong-Jun ;
Journal of the Korean Geosynthetic Society, volume 6, issue 3, 2007, Pages 9~16
Soil vapor extraction (SVE) is an effective and cost efficient method of removing volatile organic compounds (VOCs) and petroleum hydrocarbons from unsaturated soils. Incorporating PVDs in an SVE system can extend the effectiveness of SVE to lower permeability soils by shortening the air flow-paths and ultimately expediting contaminant removal. With this approach, the real bounded system is replaced for the purposes of analysis by an imaginary system of infinite areal extent. The boundary conditions for the contaminant remediation model test include constant head and no flow condition. Due to these parallel boundaries conditions, image wells should be developed in order to maintain the condition of no flow across the impermeable boundary. It is also assumed that the flow is drawdown along the constant head boundary condition. The factors contributing to the difference between the theoretical and measured pressure heads were also analyzed. The flow factor increases as the flow rate is increased. The flow rate is the most important factor that affects the difference between the measured and theoretical pressure heads.
A Study on the Advantage with Staged Construction Procedures and Full-Height Rigid Facing of Geosynthetic Reinforced Soil Retaining Walls
Won, Myoung-Soo ; Kim, You-Seong ; Tatsuoka, Fumio ;
Journal of the Korean Geosynthetic Society, volume 6, issue 3, 2007, Pages 17~23
To construct an ideal geosynthetic reinforced soil retaining wall (GRS-RW), the facing of the wall should be flexible enough to accommodate a large deformation of the supporting ground and to develop the large tensile force in reinforcements during wall construction as long as the stability is ensured, but should be rigid enough to be stiff and stable as well as durable and aesthetically acceptable for a long life time when the wall is in service. Facing conditions during the construction and service of the wall are quite different. So it is difficult to be satisfied all these conditions with the current construction method which is mainly used in reinforced wall construction in Korea. Most of this contradiction could be solved by the staged construction procedure. According to the results of cases and references analyses, stage construction procedures make it possible to accommodate large deformation of the supporting ground and backfill without losing the stability of the wall, and to derive the tensile strength of reinforcement causing deformation of the facing. When the facing is a full-height rigid one, it also appeared almost impossible to occur a local shear failure of the active zone, and pull-out failure of reinforcements. Therefore, GRS-RWs having a full-height rigid facing have been constructed by the staged construction procedures that matched well with the theory of reinforced soil, which had outstanding stability and durability, and thus could be used for railways and bridge abutments in Korea in the future.
Soft Ground Improvement using Electrokinetic Geosynthetics
Lee, Myung-Ho ; Han, Jung-Geun ; Lee, Jai-Young ;
Journal of the Korean Geosynthetic Society, volume 6, issue 3, 2007, Pages 25~30
The major reason to employ electrokinetic geosynthetics is to take advantage of its ability to densify very low permeability materials in shorter time periods than ordinary seepage consolidation. A number of laboratory scale experiments was carried out with acrylic column using natural clayey soil. The testing results indicate that (1) the electrically induced settlement was faster than the gravitational one, (2) the higher the voltage, the faster the dewatering but the less final settlement, and (3) the pH extended as low as 3 in the anode section and as high as 11 near the cathode.
Pull-Out Properties of Steel Strip Reinforcement with Transverse Steel Bar
Lee, Kwang-Wu ; Cho, Sam-Deok ; Ju, Jae-Woo ; Park, Jong-Beom ;
Journal of the Korean Geosynthetic Society, volume 6, issue 3, 2007, Pages 31~37
A steel strip reinforcement for the reinforced earth structures was recently developed to substitute the existing ribbed steel strip reinforcement. The developed reinforcement consists of the punched steel strip having dimension of 65mm width and 4.5mm thickness and the transverse steel bar for increasing bearing resistance. The punched steel strip has holes of 11mm diameter in every 50cm spacing with 2mm rising around perimeter of the holes. A series of shear friction tests and pull-out tests were carried out to evaluate the friction properties of the developed reinforcement. The results of these tests show that pull-out resistance of the developed reinforcement was significantly increased when the transverse steel bars are installed in the punched steel strip.
Bearing Capacity of Waste Landfill Reinforced by Geosynthetics
Shin, Eun-Chul ; Park, Jeong-Jun ;
Journal of the Korean Geosynthetic Society, volume 6, issue 3, 2007, Pages 39~46
Many industrialized countries of the world have many problems about the reuse of waste landfill area because the increase of terminated waste disposal landfill. Especially, the effective use of the terminated waste disposal landfill nearby the urban area has been demanded, because of the lack of the usable land. However, the reuse of terminated waste disposal landfill site is needed an adequate stabilization of ground for increasing the bearing capacity and reduce the allowable settlement for the given structure. This study is to evaluate the applicability of geosynthetics for the increment of bearing capacity of solid waste landfill ground. The in-situ cyclic plate loading tests were performed to determine the dynamic and static behaviors of reinforced ground with geosynthetics. Four series of test were conducted with variations of geosynthetics, number of geogrid layer. Based on the cyclic plate load test results, the bearing capacity ratio, subgrade modulus of ground, and the elastic rebound ratio were determined.