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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 3, Issue 4 - Dec 2004
Volume 3, Issue 2 - Jun 2004
Volume 3, Issue 1 - Mar 2004
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An Application of Elasto-Plastic Model to Overhanging Geosynthetic-Reinforced Soil Structure
Kim, Eun-Ra ; Iizuka, Atsushi ; Kim, You-Seong ;
Journal of the Korean Geosynthetic Society, volume 3, issue 4, 2004, Pages 3~12
In this paper, a mechanism of the soil structure reinforced by geosynthetics is discussed. The reinforcing mechanism is interpreted an effect arising from the reinforcement works so as to prevent the dilative deformation (negative dilatancy) of soil under shearing. A full-scale in-situ model test was carried out in Kanazawa of Japan(1994) and in the laboratory test the strength and the characteristics of deformation conducting a constant volume shear test are examined. The parameters needed in the FEM are also applied by using the experimental data. The elasto-plastic finite element simulation is carried out, and the results are quantitatively compared with that of experiment. As a results, it is known that the theoretical predictions could be explained effectively the experimental results which are obtained by a full-scale in-situ model test.
Failure Mechanism of Geosynthetic-Reinforced Segmental Retaining Wall in a Tiered Configuration
Yoo, Chung Sik ; Jung, Hyuk Sang ; Lee, Bong Won ;
Journal of the Korean Geosynthetic Society, volume 3, issue 4, 2004, Pages 13~19
This paper presents the results of an investigation on the failure mechanism of geosynthetic-reinforced segmental retaining walls in tiered arrangement using reduced-scale model tests. In this laboratory model tests, a reduced scale model of the full-scale geosynthetic-reinforced wall which was constructed in Geotechnical Experimental Site at Sungkyunkwan University was used to perform a study on the failure mechanism. In order to a high degree of realism, the geometry of the wall and the material properties were selected applying Similitude Laws was used to perform laboratory model tests. And contrary to the previous failure tests with various surcharge pressures, the failure by the tired wall weight was observed. Primary variables considered in the model tests include the different offset distance between the tiers and the different reinforcement length in the lower tier and as a result of the parametric study, a different failure pattern was observed.
Analysis of Stress Relaxation Behaviors of Geosynthetics
Jeon, Han-Yong ; Park, Young-Mok ; Chung, Jin-Gyo ;
Journal of the Korean Geosynthetic Society, volume 3, issue 4, 2004, Pages 21~27
Stress relaxation behaviors of nonwoven geotextile and geomembrane which have protection, filtration and drainage, water barrier functions, respectively were analyzed. 'Theory of transition phenomena' was applied to interpretate the stress relaxation behaviors of two geosynthetics. The initial and later relaxation times for stress relaxation behaviors of geosynthetics were derived from the constitutive equations. The initial relaxation behaviors of these geosynthetics were dependent on the additional strains and were especially faster with temperature. Finally, both relaxation times of geosynthetics were shorter with additional strain and temperature.
Assessments of Installation Damage and Creep Deformation of Geogrids
Cho, Sam-Deok ; Lee, Kwang-Wu ; Oh, Se-Yong ; Lee, Do-Hee ;
Journal of the Korean Geosynthetic Society, volume 3, issue 4, 2004, Pages 29~40
The factors affecting the long-term design strength of geogrids can be classified into factors on creep deformation, installation damage, temperature, chemical degradation, biological degradation. Especially, creep deformation and installation damage are considered as main factors to determine the long-term design strength of geogrids. This paper describes the results of a series of experimental investigation, which were conducted to assess the installation damage according to different fill materials and creep characteristic of various geogrids. The results of this study show that the installation damage and creep deformation of geogrids significantly depends on a row material and a manufacturing process of geogrids.
Design Method of Spread Footing of Semicircular Shape Reinforced by Geosynthetics
Ju, Jae-Woo ; Lee, Seung-Eun ; Park, Jong-Beom ; Kim, Ki-Seong ;
Journal of the Korean Geosynthetic Society, volume 3, issue 4, 2004, Pages 41~48
Recently a method for increasing the bearing capacity by laying the reinforcing materials with three or four layers as a method reinforcing the ground was studied recently. The purpose of this study is to examine the method for increasing shear-strength factor of the ground by reinforcing the ground under the foundation. According a method of wrapping ground with bakk-shape or semicircle-shape by geotextile was developed in this study and it looks likes anaspect that spreading footing exits under spread footing. A simulation loading-test using Aluminum sticks was carried out in order to examine the mechanism about bearing capacity of spread footing reinforced by geotextile. Increase of ultimate bearing capacity was verified in this simulation loading-test when charging loads to spread footing, which is propose from this study, reinforced by geotextile. And moving directions of points of the ground were also checked by grid-type indication method, and the areas where plastic failure appeared were checked by B-shutter photographing.