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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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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
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Experimental Study on the Reduction of the Discharge Capacity of Vertical Drains
Kim, Chan-Kee ; Chae, Young-Su ; Lee, Kang-Il ;
Journal of the Korean Geosynthetic Society, volume 4, issue 3, 2005, Pages 3~10
This paper aims at investigating the characteristics of discharge capacity according to lateral pressure, hydraulic gradient and deformation of drain materials. A series of experiments were conducted to achieve this objective. In experiments, fiver drain boards as well as harmonica and castle types of drain boards were installed in a rubber membrane, and clay in sully was filled around them. The test results showed that the harmonica type of drain boards have the greatest discharge capacity comparing to castle and fiber drain boards. The results also indicated that the hydraulic gradient has more effect on reduction of discharge capacity than the lateral pressure.
Assessment of Long-Term Stability of Geosynthetic Reinforcement Materials by Reduction Factors
Jeon, Han-Yong ; Mok, Mun-Sung ; Cho, Seong-Ho ; Cha, Dong-Hwan ; Kim, Seong-Cheol ; Ahn, Ju-Hwan ;
Journal of the Korean Geosynthetic Society, volume 4, issue 3, 2005, Pages 11~19
Long-term stability of two type geogrids were evaluated. Membrane drawn type geogrid showed the exponential type tensile property and textile type geogrid showed the rapid increase of tensile property closer toward the break point. Short term accelerated creep test was done for textile type geogrid but done for membrane drawn type geogrid at ambient temperature because of its thermal property. Creep strain for membrane drawn type geogrid was larger than the ultimate tensile strain by tensile test. Reduction factor by creep deformation of textile type geogrid was smaller than that of membrane type geogrid. From this result, it was seen that the textile type geogrid is more stable than membrane type geogrid by creep deformation.
Numerical Analysis of Geosynthetics-Reinforced Soil Structure with Pre-stress
Kim, Eun-Ra ; Kim, You-Seong ;
Journal of the Korean Geosynthetic Society, volume 4, issue 3, 2005, Pages 21~33
This paper presented a mechanism of the soil structure reinforced by geosynthetics, in which the reinforcing mechanism is treated as the effect arising from the reinforcement process to prevent the dilative deformation of soil under shearing. A full-scale in-situ model test was carried out by introducing the prestress method to enhance the geosynthetic-reinforcement, and the prestress effect through the FEM is also examined. The elasto-plastic model and the initial parameters needed in the FEM are presented. Moreover, the theoretical prediction is compared with the experimental results, which were obtained by a full-scale in-situ model test.
Case Study on the Countermeasure Methods and Collapsed Sources of Segmental Retaining Wall Considering Site Conditions
Han, Jung-Geun ; Cho, Sam-Deok ; Jeong, Sang-Seom ; Lee, Kwang-Wo ; Kim, Ji-Sun ;
Journal of the Korean Geosynthetic Society, volume 4, issue 3, 2005, Pages 35~43
The geosynthetic reinforced segmental retaining walls(SRW) are improved that the disadvantage of existed retaining wall and the workability in field. Recently, the segmental retaining wall is replacing the exited wall because it is quickly advanced to using by the block in-situ. The use, therefore, is increasing. But, the trends of the large scaled construction was developed that the problems likely to crack and collapse, those are caused of careless in design and construction of SRW not considering about various surrounding conditions. In this study, the cause analysis on destructed SRW was carried out that based on the datum of measured displacement of walls, rainfall features and ground sounding conditions. Also, the analysis of the global slope stability was carried out on collapsed section and non-collapsed section using critical equilibrium method. For the rational stability and analysis of slope including SRW structure, the site conditions including situations of topography, ground and histories of construction and collapse etc should be considered. The rational countermeasure methods for non-collapsed and collapsed areas may be sustained as much as possible current state.
A Study on Applicability of Soil Strength for Surface Treatment
Yang, Tae-Seon ; Kim, Byeong-Ho ;
Journal of the Korean Geosynthetic Society, volume 4, issue 3, 2005, Pages 45~52
Most marine structures are constructed on very soft soil, soil improvements are needed for the area of road, buildings. In this paper, some considerations of several case studies on soil placement method after geotextile placement, known as surface treatment, are done. Considerations of strength applicability on the advanced construction method of sand and soil placement are proposed in this paper. Typical tensile strength of geotextile used in the surface soil stabilization method is 15t/m, and thickness of sand and soil placement between 1.6m and 3.1m. Undrained shear strength of soft clay layer ranges
. In order to minimize the difficulties which include soil disturbance, soft soil gush and overturn of vertical drain installation rig more studies are needed.