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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 4, Issue 4 - Dec 2005
Volume 4, Issue 3 - Sep 2005
Volume 4, Issue 2 - Jun 2005
Volume 4, Issue 1 - Mar 2005
Selecting the target year
Application of Stepped Isothermal Methods to Lifetime Prediction of Geogrids
Koo, Hyun-Jin ; Kim, You-Kyum ; Kim, Dong-Whan ;
Journal of the Korean Geosynthetic Society, volume 4, issue 1, 2005, Pages 3~6
The failure of geogrids can be defined as an excessive creep strain which causes the collapse of slopes and embankments. In this study, the lifetime of knitted polyester geogrids was predicted by using SIM(Stepped Isothermal Methods using TTS principal) and statistical data analysis techniques. The results indicate that the creep strain was 8.74, 8.79, 8.80% with 2.16~2.20% of CV% at 75, 100, 114 years, respectively and the creep strain reaches 9.3% after 100 years of usage at
which meets the required lifetime(creep strain less than 10% after 100 years of usage) in the fields. The SIM method is shown to be effective in reduction of uncertainty associated with inherent variability of multi-specimen tests and shorter test times than conventional TTS(Time-Temperature Superposition).
Feasibility and Filtering Efficiency of Geotextile Tube Structure with Polymer Material
Oh, Young-In ; Shin, Eun-Chul ; Kim, Sung-Yoon ;
Journal of the Korean Geosynthetic Society, volume 4, issue 1, 2005, Pages 7~15
In recent years, the geotextile tubes filled with dredged material have been used in dike and breakwater construction for a number of projects around the world, and their use in this field is growing very fast. One of the most attractive advantages of geotextile tube technology is can be use the in-situ filling materials by hydraulic pumping, it can be also established lower costs and fast construction than other technology. Geotextiles form one of the two largest groups of geosynthetics and it is commonly made by two major types of polymer material(Polypropylene, Polyester). The objective of this paper is to examine several issues associated with drainage function and feasibility of geotextile tube structure such as filtering efficiency, dewatering efficiency, and filling process with polymer materials. Based on the laboratory filtering test and in-situ tests, polypropylene goetextile is more effective for drainage function of geotextile tube technology.
A Case Study in a Rainfall induced Failure of Geosynthetics-Reinforced Segmental Retaining Wall
Yoo, Chung-Sik ; Jung, Hye-Young ; Jung, Hyuk-Sang ;
Journal of the Korean Geosynthetic Society, volume 4, issue 1, 2005, Pages 17~25
This paper presents a case history of a geosynthetics-reinforced segmental retaining wall, which collapsed during a sever rainfall immediately after the completion of the wall construction. In an attempt to identify possible causes for the collapse, a comprehensive investigation was carried out including physical and strength tests on the backfill, stability analyses on the as-built design based on the current design approaches, and slope stability analyses with pore pressure consideration. The investigation revealed that the inappropriate as-built design and the bad-quality backfill were mainly responsible for the collapse. This paper describes the site condition including wall design, details of the results of investigation and finally, lessons learned. Practical significance of the findings from this study is also discussed.
Discharge Capacity of Environmentally Friendly Drains
Cho, Sam-Deok ; Kim, Ju-Hyong ; Jung, Seung-Yong ;
Journal of the Korean Geosynthetic Society, volume 4, issue 1, 2005, Pages 27~36
Discharge capacity of the fiber mat and the fiber drain made with natural fibers abstracted from plant source was evaluated by permeability test for fiber mat and Delft type test and composite discharge capacity test using disturbed clayey soils for fiber drain. The permeability test results for environmentally friendly coconut fiber mat prove that fiber mat has outstanding permeability in substituting permeable sand. However, discharge capacity of fiber drain evaluated by conventional Delft type discharge capacity test was relatively lower than that of plastic drain board. Nevertheless, settlement and pore pressure dissipation behaviors of fiber drain and plastic drain board installed clay soil during the composite discharge capacity test were almost similar to that of plastic drain board. It is found that the natural fiber drain satisfies requiring minimum discharge capacity in substituting the conventional plastic drain board.
Performance Assessment of PVA Geotextile/HDPE Geomembrane Composites
Jeon, Han-Yong ; Hong, Sang-Jin ; Lyoo, Won-Seok ;
Journal of the Korean Geosynthetic Society, volume 4, issue 1, 2005, Pages 37~46
PVA geotextile/HDPE geomembrane composites were made to examine the waste landfill related properties. Tensile properties, tear and bursting strengths, AOS(apparent opening size) and permittivity of PVA geotextiles were evaluated, respectively. Ultraviolet stability and chemical resistance to the leachate was evaluated also. Friction property and creep deformation were tested at various loading condition. From this, it was seen that PVA geotextile/HDPE geomembrane composites have more excellent properties than the typically used polypropylene and polyester geotextiles in waste landfill. Finally, creep deformation behaviours of PVA geotextile/HDPE geomembrane composites were more stable than polypropylene and polyester geotextiles through the reduction factor analysis.