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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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Korean GeoSynthetics Society
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Volume & Issues
Volume 10, Issue 4 - Dec 2011
Volume 10, Issue 3 - Sep 2011
Volume 10, Issue 2 - Jun 2011
Volume 10, Issue 1 - Mar 2011
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Estimation of Bearing Capacity for In-Situ Top-Base Method by Field Experimental Plate Load Test
Shin, Eun-Chul ; Ahn, Min-Hye ;
Journal of the Korean Geosynthetic Society, volume 10, issue 1, 2011, Pages 1~8
The problems like a deterioration of loading bearing capacity, an exaggeration of settlement and lateral deformation are able to be generated, meanwhile structures are built in soft ground. Top-Base method is belonged to a rigidity mat foundation method which is used to surface treatment of soft ground. This method makes an effect to increase the bearing capacity of foundation using friction force, and prevent the differential settlement. Further more, the In-Situ Top-Base method has advantages in the phase of economic effect by reduction of the construction cost and offers an expediency on construction comparing with precast products. This paper presents the way of the estimation of bearing capacity for In-Situ Top-Base method through field plate load test in soft ground. It utilizes the results to a future design by analyzing the properties in the existing study and designs through these analysis and calculating the top-base method's reasonable range.
Application Evaluation of Countermeasure Method using Analysis of Failure Causes for Reinforced Slope
Han, Jung-Geun ; Hong, Ki-Kwon ; Lee, Jong-Young ; Jung, Sun-Kuk ;
Journal of the Korean Geosynthetic Society, volume 10, issue 1, 2011, Pages 9~18
This paper described that the failure causes of reinforced slope are analyzed based on the effect of geological and rainfall. The analysis result confirmed that the rainfall has effects on the stability of reinforced slope. Therefore, it was applied to the dewatering method using collector well for slope stabilized, and then the analysis of seepage and slope stability were conducted on slope with the applied method. The results of seepage analysis are corresponded with failure cause by rainfall and the results of slope stability, which is applied to dewatering method, are satisfied with safety factor criterion. Therefore, it confirmed that the dewatering method using collector could be possible to apply in field and reasonable method for slope stabilized during heavy rainfall.
Effect of Cyclic Freezing-Thawing on Compressive Strength of Decomposed Granite Soils
Yoo, Chung-Sik ; Shin, Boo-Nam ;
Journal of the Korean Geosynthetic Society, volume 10, issue 1, 2011, Pages 19~28
This paper presents the results of an investigation into the effect of cyclic freezing-thawing on the compressive strength characteristics of decomposed granite soils. A plane strain compression (PSC) tests were performed on a series of test specimens with different freezing-thawing cycles and fine contents to investigate the change in compressive strength under the process of freezing-thawing cycles. Also performed were scanning electron microscope (SEM) tests to investigate the change in structural rearrangement from a micro-scale point of view. The test results showed that the soil particles tend to conglomerate when subject to cycles of freezing and thawing, and that the soil with less fines exhibited decreased shear strength due to the cyclic freezing-thawing while the soils with a larger fine content showed the opposite trend.
The Comparison of Remediation Efficiency for Contaminated Soils under Vertical Drain System by Numerical Analysis Method
Shin, Eun-Chul ; Lee, Sung-Chul ; Park, Jeong-Jun ;
Journal of the Korean Geosynthetic Society, volume 10, issue 1, 2011, Pages 29~36
The remediation efficiency of the contaminant through laboratory experiment of the pilot scale was evaluated for the influence factors in the contaminated soils for the applicability of the prefabricated vertical drain system. It was performed numerical analysis by the method that the finite element and finite differences based on the drawn result about the remediation of contaminated soils. The parametric analysis for the applied parameter value was performed. In the pilot scale remediation experiment, as a result of evaluating with the minimum limit concentration ratio, in the case of dense and loose conditon, the remediation time was much longer. And the remediation efficiency was rapidly progressed as the time was elapsed. It was analyzed that the contaminant concentration is reduced around the extraction well as the contamination remediating rate by numerical analysis result as the time was elapsed.
The Mechanical Properties of Porous Concrete using Recycled Asphalt Aggregate
Lee, Dong-Wook ; Yun, Jung-Mann ; Kim, Nam-Sik ; Kang, Young-Min ;
Journal of the Korean Geosynthetic Society, volume 10, issue 1, 2011, Pages 37~42
In this study, it is analyzed that mechanical properties and required strength of porous concrete according to the mixing ratio of cement, fine aggregate, and water/cement ratio in order to evaluate mechanical properties of porous concrete using recycled asphalt aggregate. Recycled asphalt aggregates of 13 mm were used without modification of aggregate grading to extend porous concrete application. The water/concrete ratio was poor mix and the range of compressive strength was 18.2 to 19.5 MPa. The average value of permeability showed 8.0E-02 cm/sec.
Experimental Study on Lateral Flow Behavior of Soft Ground due to Embankment
You, Seung-Kyong ; Kim, Jae-Hong ;
Journal of the Korean Geosynthetic Society, volume 10, issue 1, 2011, Pages 43~51
Pile-supported embankment is one of the reinforcing methods to minimize damage due to the severe subsidence and lateral flow when soft clay ground is supported with embankment. pile-supported embankment mainly penetrates soft ground into the bearing stratum in order to support surcharge load which minimizes the subsidence and lateral flow due to the surcharge load. The aim of this research is to review quantitatively reinforcing effect of pile-supported embankment which is installed in soft clay ground. From the model test, it reproduced the ground movement with regard to the non-reinforced and reinforcing embankment-pile and also analyzed stabilizing effects of lateral flow due to the pile-supported embankment. With regard to the case of installing pile-supported embankment, its were analyzed stabilizing effects of lateral flow in cases of quick-load and slow-load to make different surcharge load.
Analysis on Adsorption Characteristics of CFW for the TCE and Phenanthrene
Han, Jung-Geun ; Lee, Soung-Hyun ; Lee, Ki-Seok ; Hong, Ki-Kwon ;
Journal of the Korean Geosynthetic Society, volume 10, issue 1, 2011, Pages 53~61
This study was conducted to confirm the adsorption capacity of CFW(Carbonized Foods Waste), which is produced by the process of recycling waste, in PRB method that Electrokinetic(E/K) method was applied. The batch test was carried out to analyze the adsorption characteristics of CFW for adsorbing the organic compounds. The organic compounds used in the batch test were Phenanthrene and Trichloroethylene(TCE), and the anionic surfactant(SDS) and the nonionic surfactant(Brij
30) were used for the surfactants. The results of the batch test confirmed that the adsorption efficiency of Phenanthrene was 99% and TCE was 26%. The each compounds compared with the adsorption isotherms, which is calculated by the Langmuir and Freundlich models. The results indicated that Phenanthrene is fitted to the linear Langmuir model, whereas the distribution of TCE is unclear. The results of the batch test used in surfactants confirmed that the adsorption efficiency of CFW using Phenanthrene was reduced to 6~8%. However, the adsorption efficiency of CFW in TCE was increased up to 81% by surfactants. Especially, the nonionic surfactant was excellent in the adsorption of CFW using TCE. Nevertheless, the adsorption efficiency of CFW in Phenanthrene was still higher than TCE. Therefore, the adsorption efficiency of CFW in Phenanthrene was better than in TCE. In PRB method using E/K method, the adsorption of CFW used nonionic surfactant is better to use than the anion surfactants on the organic compounds.