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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
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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
Analysis of Geotextile Bag Reinforcing Effect on Railway Roadbed
Lee, Dong-Hyun ; Shin, Eun-Chul ;
Journal of the Korean Geosynthetic Society, volume 4, issue 4, 2005, Pages 3~11
In this study, a large-scale laboratory model test and 2-D numerical analysis were conducted to verify the reinforcement effect by utilizing geotextile bag on the railway roadbed. Static loading which simulated train load was applied on the geotextile-reinforced railway roadbed and also unreinforced railway roadbed. Computer program named Pentagon 2-D which is a part of FEM programs was used in the numerical analysis. Based on the results of laboratory test and 2-D numerical analysis, the effect of load distribution and settlement reduction was found to be depending on the geotextile characteristics, tensile strength of geotextile, and interface friction angle between geotextile bags. In general, the result of 2-D numerical analysis shows lower value than that of laboratory test.
Behavior of Geosynthetic Reinforced Modular Block Walls with Settlement of Foundation
Yoo, Chung-Sik ; Jung, Hye-Young ; Song, Ah-Ran ;
Journal of the Korean Geosynthetic Society, volume 4, issue 4, 2005, Pages 13~21
This paper presents the results of an investigation on the effects of settlement of foundation on the behavior of geosynthetic-reinforced modular block walls in a tiered arrangement using the finite-element method of numerical analysis. A parametric study was performed by varing the foundation condition and offset distance between the tiers and reinforcement length of the lower and upper tier using varified finite-element model. The finite-element analysis provided relevant information on the mechanical behavior of the wall and interaction mechanism between the upper and lowers that was otherwise difficult to obtain from the limit-equilibrium analysis based current design approaches. Practical implications of the findings obtained from this study to current design approaches are discussed in great detail.
Experimental Investigations of Combination Effects of Installation Damage and Creep Deformation on Long-Term Design Strength of Geogrids
Cho, Sam-Deok ; Lee, Kwang-Wu ; Oh, Se-Yong ; Lee, Do-Hee ;
Journal of the Korean Geosynthetic Society, volume 4, issue 4, 2005, Pages 23~37
The factors affecting the long-term design strength of geogrid can be classified into factors on creep deformation, installation damage, temperature, chemical degradation and biological degradation. Especially, creep deformation and installation damage are considered as main factors to determine the long-term design strength of geogrid. Current practice in the design of a reinforced soil structures is to calculate the long-term design strength of a geosynthetic reinforcement damaged during installation by multiplying the two partial safety factors,
. This method assumes that there is no evaluation of synergy effect between installation damage and creep deformation of geogrids. This paper describes the results of a series of experimental study, which are carried out to assess the combined effect of the installation damage and the creep deformation for the long-term design strength of geogrid reinforcements. A series of field tests was carried out to assess installation damage of various geogrids with respect to different fill materials, and then creep tests are conducted to evaluate the creep deformation of both undamaged and damaged geogrids. The results indicated that the tensile strength reduction factors, RF, considering the combined effect between the installation damage and the creep deformation is less than that calculated by the current design method.
3-Dimensional Consolidation Analysis Considering Viscosity on Soft Clay Ground improved by Plastic Board Drain
You, Seung-Kyong ; Han, Jung-Gun ; Jo, Sung-Min ; Kim, Ji-Yong ;
Journal of the Korean Geosynthetic Society, volume 4, issue 4, 2005, Pages 39~46
A series of numerical analyses on soft clay ground improved by plastic board drain(PBD) were carried out, in order to investigate the consolidation behavior considering viscosity of the improved ground. The applicability of numerical analyses, in which an elasto-viscoplastic three-dimensional consolidation finite element method is applied in this study, was confirmed through comparison between experimental and analytical results. As the analytical results, consolidation behavior of both settlement and excess pore pressure and effective stress in clay were elucidated. Then secondary consolidation characteristics of improved ground were estimated through compare with results of typical one-dimensional consolidation analysis.
A Case Study of Hybrid Reinforced Geo-Structure using Reinforced Concrete Block and Slope
Kim, Young-Nam ; Chae, Young-Su ; Lee, Kang-Il ;
Journal of the Korean Geosynthetic Society, volume 4, issue 4, 2005, Pages 47~56
With the need of efficient site use retaining walls have frequently used. Of them dry cast modular block wall(MBW), in which geogrid and concrete block are used is getting popular because of its simplicity and economical efficiency of construction. However, since this method is based on the theory of earth pressure, sands with good quality should be used. In contrast, reinforced soil slope(RSS) that the slope is less than
can use wider range of soil than MBW. A hybrid reinforced geo-structure might be a good alternative in view of overcoming difficulty obtaining soils with good quality as well as maximizing the efficiency of site use. This method is composed of reinforced block wall and reinforced soil slope. In this method, reinforced block wall is constructed up to a certain height vertically at ground boundary first. Reinforced soil slope is then constructed on the block wall subsequently. This paper introduces several technical points that should be taken into account in design and construction.