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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of the Korean Geosynthetic Society
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Journal DOI :
Korean GeoSynthetics Society
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Volume & Issues
Volume 1, Issue 1 - Dec 2002
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A Study on the Evaluation of Shear Strength of Geotextile & Geomembrane by Traffic Load in Landfill Final Cover System
Park, Sang-Hyun ; Lee, Jai-Young ; Choi, Mun-Young ;
Journal of the Korean Geosynthetic Society, volume 1, issue 1, 2002, Pages 3~11
The Geotextiles have been used for the protection of Geomembrane and the prevention of clogging phenomenon; however, the material can be easily damaged by construction equipments. It generally recommended to use at least
of Geotextile in Korea landfill, but few researcher were performed about the damage of Geotextile. Therefore, we intended to evaluate the potential damage of Geotextile by the traffic load simulating the final cover system in a field scale. Tensile strength and strain were appraised to understand the degree of damaged Geotextile. The tests were conducted under the condition of cross direction of Geotextile. Four different weight of Geotextile was used for the evaluation
. The initial strain of
of Geotextile showed 50% that did not meet the standard 60%. The strain of
of Geotextile was below the standard after the traffic load test; however, the others met the requirement in the test. In conclusion, the weight of Geotextile used in landfill to protect the Geomembrane should be at least
in a view of strain requirement. We expect this study provides fundamental information for the construction of Geotextile in landfill.
Installation Technology and Behavior of Silty Clay Filled Geotextile Tube
Shin, Eun-Chul ; Oh, Young-In ;
Journal of the Korean Geosynthetic Society, volume 1, issue 1, 2002, Pages 13~21
Geotextile tubes hydraulically or mechanically filled with dredged materials have been applied in hydraulic and coastal engineering in recent years(detached breakwater, groins and jetty). The geotextile tubes are made of sewn geosynthetics sheets. If the sandy soil is use to fill material, these inlets should be spaced closely to assure uniform filling of the tubes because sandy soil and geosynthetic is very pervious. However, the clayey soil or contaminated slurry is used, the inlets can be located relatively long distance. The fine clayey particles tend to rapidly blind the fabric slowing down water escape through the geotextile. This paper presents a field test result of a geotextile tube in the land reclamation project for the Songdo New City construction site. The dredged silty clay was dredged by the dredging ship and hydraulically pumped into the geotextile tube. The height of geotextile tube was measured at every filling stage and also measured width and diameter of geotextile tube with the elapsed time. Based on the test results, if the clayey filling material is used, the pumping step must be divided 3~4 stages for drainage and sediment. After complete drainage, the height of the geotextile tube reduces by approximately 50%.
Development on Design Method for Railway Roadbed by Geocell System
Shim, Jae-Bum ; Shin, Min-Ho ; Cho, Sam-Deok ; Chae, Young-Su ;
Journal of the Korean Geosynthetic Society, volume 1, issue 1, 2002, Pages 23~29
Since 1980's in U.S.A and Japan, the studies on increasing the bearing capacity of railway roadbed using geocell system have been conducted for repair and reinforcement of railways constructed on soft soils. In this study, the railway roadbed reinforced with geocell system, used for repair and reinforcement of existing railways in Korea, has been analyzed and investigated the results of the previous studies conducted in Korea and other nations. And the method for estimating the railway roadbed thickness was developed based on the equivalent method using the multi-layer theory and the deformation modulus Ev.
Design Aspects of Soil-Reinforced Segmental Retaining Walls in Tiered Arrangement - Case Study
Yoo, Chung-Sik ;
Journal of the Korean Geosynthetic Society, volume 1, issue 1, 2002, Pages 31~41
This paper presents the results of stability analyses on soil-reinforced segmental retaining walls in a tiered arrangement. Four different walls were examined to investigate the appropriateness of their designs within the context of the current design guidelines based on limit equilibrium. Slope stability analysis against the compound failure mode, which is frequently ignored during design, was also performed based on the method recommended by FHWA design guidelines. The results indicate that the as-built designs of some of the walls examined do not meet the minimum factors of safety for the external and internal stabilities, and for the compound failure mode. The implications of the findings from this study are discussed.
Assessment of Hydraulic Properties of Bentonite Swelling Agents by Blending with Additives
Jeon, Han-Yong ; Park, Yeoung-Mog ; Mok, Mun-Sung ;
Journal of the Korean Geosynthetic Society, volume 1, issue 1, 2002, Pages 43~51
In this study, free swell index of betonite was examined in several regeants; distilled water, leachate, seawater and 3% NaCl solution. Free swell index values of bontonite to be added Poly(acrlylic acid), PYA(Polyvinyl Alcohol) or SCMC (Sodium Carboxymethyl Cellulose) were evaluated and compared. From this, it was confirmed that hydraulic conductivities of GCL in seawater were examined and the hydraulic conductivities of GCL in seawater were compared to those in distilled water. The average values of free swell indices of bentonite were decreased in order of distilled water>leachate>seawater. It was shown that no significant differences were occurred for free swell index between seawater and 3% NaCl solution. For bentonite to be added PVA, the other reagents except distilled water didn't affect increase of swelling. Swelling properties of bentonite to be added SCMC were improved except 3% NaCl solution.
Economic Analysis Considering Traffic Characteristics for the Glass Fiber Sheet Reinforced Asphalt Pavement
Cho, Sam-Deok ; Lee, Dae-Young ; Han, Sang-Ky ; Kim, Nam-Ho ;
Journal of the Korean Geosynthetic Society, volume 1, issue 1, 2002, Pages 53~61
Even though a lot of laboratory and field tests for asphalt pavements using geosynthetics have been conducted recently, any rational and systematic analysis for the economic efficiency of the asphalt pavement systems reinforced by using geosynthetics has not been proposed yet. In this study, the economic analysis considering the traffic characteristics for the glass fiber sheet reinforced asphalt pavement was performed using the Life Cycle Cost Analysis(LCCA) which is commonly used for the economic analysis technique. The economic efficiency for the glass fiber sheet reinforcement and the traffic characteristics was examined by applying the test results from the literature review to the economic analysis model.