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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 8, Issue 4 - Dec 2009
Volume 8, Issue 3 - Sep 2009
Volume 8, Issue 2 - Jun 2009
Volume 8, Issue 1 - Mar 2009
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Pullout Resistance of Steel Strip Reinforcement with Transverse Members using Large-scale Pullout Tests
Lee, Kwang-Wu ; Cho, Sam-Deok ; Han, Jung-Geun ; Hong, Ki-Kwon ;
Journal of the Korean Geosynthetic Society, volume 8, issue 4, 2009, Pages 1~8
In this study, the large-scale pullout tests are conducted to evaluate pullout resistance of steel strip reinforcement with transverse members. The test results clearly showed the passive effect by normal stress. This suggests that both friction resistance and passive resistance by normal stress should be taken into account in the evaluation of pullout resistance for design. Therefore, The evaluation results confirmed that the developed steel strip reinforcement with transverse members depend heavily on passive resistance by normal stress.
Investigation on Differential Settlement Characteristics of the Final Landfill Cover Used SRSL
Kwon, Oh-Jung ; Oh, Myoung-Hak ; Cho, Wan-Jei ; Park, Jun-Boum ;
Journal of the Korean Geosynthetic Society, volume 8, issue 4, 2009, Pages 9~17
This research was intended to verify the stability of landfill final cover using SRSL(Self Recovering Sustainable Liner) with regard to differential settlements due to the degradation of waste and so on in a waste landfill. Numerical analysis was performed using FLAC 2D software program with input parameters based on soil characteristic tests and reference data after the blank was designed in order to represent the decomposition condition of waste. The maximum settlement of landfill cover was calculated to investigate the structural stability of landfill cover with the different condition of settlement width, settlement depth, and number of differential settlements. The allowable maximum deformation rate of SRSL, which was calculated using field permeability tests, was 6 mm. The analysis showed that SRSL was stable in case of a differential settlement width not exceeding 24.5% of total cover width.
Estimation of Pull-out Behavior for Steel Pile Nailing installed Foldable Wedge by Field Measurement
Kwon, Kyo-Keun ; Choi, Bong-Hyuck ; Kim, Kyung-Min ;
Journal of the Korean Geosynthetic Society, volume 8, issue 4, 2009, Pages 19~25
In this study, field pull-out tests were performed for steel pipe nailing installed foldable wedge and non-wedge type steel pipe nailing under the same test conditions. This is to evaluate pull-out resistance improvement effect of steel pipe nailing installed foldable wedge. Evaluating for field pull-out characteristics of steel pipe nailing installed foldable wedge was performed through analysis of ultimate pull-out resistance (
), ultimate unit skin friction (
), tensile normal stiffness (
), tension of nail. As a result, the steel pipe nailing installed foldable wedge have an effect of pull-out resistance increased about 30% in comparison with non-wedge type steel pipe nailing.
Strength and Deformation Characteristics of Geosynthetics-Reinforced Slag Materials
Shin, Dong-Hoon ; Lee, Jong-Seok ;
Journal of the Korean Geosynthetic Society, volume 8, issue 4, 2009, Pages 27~34
In this paper, characteristics of shear strength and deformation of geosynthetics-reinforced slag materials are described. In order to investigate the effect of geosynthetics on shear strength and deformation behavior of slags, when they are reinforced with geosynthetics or geomat such as PET mat, large triaxial tests were performed under consolidated-drained condition. The materials used in the study are real ones as they are in the field, so that the scale effect of samples disappeared. From the large triaxial tests, it was observed that the stress-strain relationship of geosynthetics-reinforced slags shows relatively small dilatancy and weak tendency of strain hardening, compared with that of slags without reinforcement. The shear strength parameters such as apparent cohesion and internal friction angle increase with PET mat reinforcement, consequently result in about 1.2 (for low confining pressure) to 1.4 (for high confining pressure) times of shear strength of un-reinforced sample. Therefore, the adoption of geomat-reinforced slag layers leads to an increase in the factor of safety for embankment design on soft soil formations.
A Study on the Effect of Promoting Consolidation by Recycled-Aggregate Porous Concrete Pile
You, Seung-Kyong ;
Journal of the Korean Geosynthetic Society, volume 8, issue 4, 2009, Pages 35~40
In this paper, a series of laboratory chamber tests was carried out to evaluate promoting consolidation of a porous concrete pile fabricated with recycled aggregates (RAPP) method for soft ground improvement. Performing the laboratory chamber tests for the RAPP, characteristics of the surface settlement with time and the consolidation time were compared with those of SCP and GCP provided by You (2009) under the same experimental condition. In addition, the experimental results were compared with the numerical analysis in this study. As a test result, the effects for settlement reduction in both the primary and the secondary consolidation and promoting consolidation by RAPP were prominent comparatively.
Experimental Study of Clays Mixed into Compaction Piles
You, Seung-Kyong ; Kim, Ju-Hyun ;
Journal of the Korean Geosynthetic Society, volume 8, issue 4, 2009, Pages 41~46
In this paper, a series of laboratory chamber tests were performed to evaluate the effects of clays mixed into compaction piles due to confining stress of ground on consolidation promoting. For the tests, various compaction piles such as SCP, GCP, and RAPP (Recycled-Aggregate Porous concrete Pile) were used. The ground condition was simulated at 50% and 100% of degree of consolidation. Also, confining stresses were applied to the composite ground corresponding to those of 5m depth. The amount of mixed clays into each compaction pile were estimated by measuring the drainage from the saturated compaction piles. From the test result, it was shown that the drainage area of compaction pile was changing according to the consolidation condition. GCP showed the most change of drainage area as it has relatively large void ratio; however, the amount of change was decreased by progressing consolidation of ground.
Study on Slope Prevention Effect of Eco-environmental Riprap Structure
Kim, Khi-Woong ;
Journal of the Korean Geosynthetic Society, volume 8, issue 4, 2009, Pages 47~51
The slope failure in the country is caused by mainly rainfall and its type is reported shallow slope failures in general. To investigate the cause of slope failure, the unsaturated soil slope behavior in accordance with rainfall amount studies actively, but there are little studies related the slope erosion and scour by rainfall. The slope erosion and scour by rainfall cause environmental pollution and slope instability, however there are few methods to effectively control them. This research analyzed experimentally how infinite gradients are infiltrated according to the changes of amount of rainfall and the slope of gradients by manufacturing the model of gradient in order to investigate how rainfall infiltrates regarding homogeneous gradients and slope protection method. For this, this experiment measured and analyzed discharge, storage rate occurring in gradients by going on changing amount of rainfall, slope of gradients.