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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 9, Issue 4 - Dec 2010
Volume 9, Issue 3 - Sep 2010
Volume 9, Issue 2 - Jun 2010
Volume 9, Issue 1 - Mar 2010
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Analysis of Soil Mechanical Characteristics according to the Geological Condition in JangHeung Area
Song, Young-Suk ; Yun, Jung-Mann ;
Journal of the Korean Geosynthetic Society, volume 9, issue 1, 2010, Pages 1~11
The soil mechanical characteristics according to geologic conditions were investigated in the study area. The geology of study area was consisted of Ingok Tuff, Yuchi Conglomerate and Dado Tuff. Yuchi Tuff covered about 80% of the study area. The disturbed and undisturbed soils were sampled from the conglomerate area, Tuff area and Shale area, and then a series of the laboratory soil tests was performed. The soils sampled from the conglomerate area have a large dry unit weight and a low permeability relatively, while the soils sampled from tuff and shale areas have a small dry unit weight and a high permeability. It is proven that the soil permeability is highly affected by the effective grain size and the silt and clay content. That is, the soil permeability is increased with increasing the effective grain size, and the soil permeability is decreased with increasing the silt and clay content.
A Study on Comparison of Finite Element Analysis with Model Test of Shallow Footing Failure for Cohesionless Soil with Non-associated Plasticity and Some Smooth Footing
Kim, Young-Min ; Kang, Sung-Wi ;
Journal of the Korean Geosynthetic Society, volume 9, issue 1, 2010, Pages 13~20
This paper describes the procedure to predict the entire load-displacement curve and the failure mechanism of shallow strip footing for real soil. The presented results show that it is possible to analyze the post peak behavior of shallow strip footing and to give a progressive failure mechanism clearly. Finite element computation of the bearing capacity factor
have been made for shallow strip footings with friction angles and dilation angle. It is shown that commonly used values of
which have generally been based on associated plasticity calculations are unconservative for real soil with non-associated plasticity and some smooth footing.
A Study on the Deformation Behavior of Nonwoven Geotextiles Reinforced Soil Walls Based on Literature Reviews
Won, Myoung-Soo ; Kim, Tae-Wan ; Roh, Jae-Kune ; Kim, Hyoung-Wan ;
Journal of the Korean Geosynthetic Society, volume 9, issue 1, 2010, Pages 21~30
To understand the deformation behavior of nonwoven geotextiles(NWGT) reinforced soil wall, analyses of load-elongation properties, soil-reinforcement interface friction, laboratory model tests, and field cases throughout literature reviews are being studied in this paper. According to the analyses results, the stiffness and tensile strength of NWGT is increased in proportion to confinement pressures, and the interface shear strength at soil-NWGT appeared to be stronger than soil-geogrid interface. The deformation at the beginning of loading on NWGT reinforced soil wall is larger than geogrid reinforced soil wall, but the wall deformation with NWGT is smaller than the wall of geogrid after passing some loading point in laboratory model tests. Case analysis results have shown that the facing of NWGT reinforced soil wall should be rigid enough to be used as a permanent wall, and NWGT and in-situ poor soil can be used for reinforcement and backfill respectively if the wall is constructed as pre-reinforced soil body and with post-facing that has a full-height rigid concrete.
Experimental Study of Compression Strength Characteristics for Geo-Bottle
Lee, Seung-Eun ; Chang, Yong-Chai ; Bowders, John.J ; Park, Jong-Beom ;
Journal of the Korean Geosynthetic Society, volume 9, issue 1, 2010, Pages 31~37
Use of disuse resources like PET (polyethylene terephthalate) bottle as construction materials will make environment-friendly approach to more efficient recycling of resources. In this study, to utilize PET bottle as substitute by EPS (expanded polystyrene) block, uni-axial test was performed on PET bottle, and compressive strengths were respectively compared and analyzed depending on whether dry ice is added or not. As a result, it was confirmed that PET bottle (Geo-bottle) can be applied to the field as substitute for EPS block.
Evaluation of the Stability of Geomembrane Liner System in Closed Waste Landfill
Lee, Heung-Gil ; Oh, Young-In ;
Journal of the Korean Geosynthetic Society, volume 9, issue 1, 2010, Pages 39~46
Recently, the effective use of closed waste landfill nearby urban areas has been demanded, because of the lack of the usable land. However, the reuse of closed landfill is needed an adequate stabilization of liner system. But most of these places are consisted of steep slope and hence it is necessary to use the geosynthetics liners in there. Liner system of waste landfills is an important facility which prevents leachate outgoing from the landfills and also groundwater infiltrating from surroundings into the landfills. During the waste disposal stage, differential settlement and tensile stress of the geosynthetic materials could occur due to impact load of trucks and dozers, waste loads and weak foundation soils. In this study, the tensile strength and tracer test were performed to evaluate the stability of geomembrane liner systems. Based on the tensile strength test result of in-situ geomembrane sample, the yield tensile strength maintain the suitable strength by specification and current law. However, according to the tracer test, the damage of geomembrane liner was detected on sanitary landfill section.
Applicability of Particle Crushing Model by Using PFC
Jeong, Sun-Ah ; Kim, Eun-Kyung ; Lee, Seok-Won ;
Journal of the Korean Geosynthetic Society, volume 9, issue 1, 2010, Pages 47~57
Granular soils having a large particle size have been used as a filling material in the construction of foundation, harbor, dam, and so on. Consequently, the shear behavior of this granular soil plays a key role in respect of stability of structures. For example, soil particle crushing occurring at the interface between structure and soil and/or within soil mass can cause a disturbance of ground characteristics and consequently induce issues in respect of stability of structures. In order to investigate the shear behavior according to an existence and nonexistence of particle crushing, numerical analyses were conducted by using the DEM (Discrete Element Method)-based software program PFC2D (Particle Flow Code). By dividing soil particle bonding model into crushing model and noncrushing model, total four particle bonding models were simulated and their results were compared. Noncrushing model included one ball model and clump model, and crushing model included cluster model and Lobo-crushing model. The combinations of soil particle followed the research results of Lobo-Guerrero and Vallejo (2005) which were composed of eight circles. The results showed that the friction angle was in order of clump model > cluster model > one ball model. The particle bonding model compared to one ball model and noncrushing model compared to crushing model showed higher shear strength. It was also concluded that the model suggested by Lobo-Guerrero and Vallejo (2005) is not appropriate to simulate the soil particle crushing.