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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 12, Issue 4 - Dec 2013
Volume 12, Issue 3 - Sep 2013
Volume 12, Issue 2 - Jun 2013
Volume 12, Issue 1 - Mar 2013
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Analysis of Long-Term Settlement Parameter Correlation and Bearing Capacity Reinforcement Effect for Closed Waste Landfill
Cho, Young-Kweon ; Chae, Young Su ;
Journal of the Korean Geosynthetic Society, volume 12, issue 4, 2013, Pages 1~10
DOI : 10.12814/jkgss.2013.12.4.001
Recently, the closed landfills are usually converted into parks or playground by the check the stability of landfill because they settle unevenly making them unsuitable for structures. When the closed landfill reuse, environmental and structural stability is important. To increase the bearing capacity and reduce the probable settlement of a foundation on waste disposal ground, a layer of geosynthetics(Geocell) is placed on the waste disposal ground. In this paper, the analysis of long-term settlement parameter correlation was performed, also the evaluation of bearing capacity reinforcement effect was conducted by field test. The settlement measured in the field, and input the same ground index when an integer to identify each model were compared by calculating the settlement. In addition, by adjusting the parameters of each model to identify the most similar to the value of field measurement parameters were calculated. Based on the analysis results, when the using the Park's model C(intermediate) = 0.0678, the expected settlement is similar to the field measurement results. Also, the bearing capacity of geocell reinforced ground is 1.193~1.554 times higher than that of unreinforced ground.
A Study on Securing safety through Behavior Analysis of Earth Retaining Wall
Kim, Kwang-Leyol ; Kim, You-Seong ; Kim, Seong-Soo ;
Journal of the Korean Geosynthetic Society, volume 12, issue 4, 2013, Pages 11~19
DOI : 10.12814/jkgss.2013.12.4.011
Recently despite the development of analysis program and construction technologies, collapse at the many earth retaining wall construction site of the structure due to the economic and human damage has occurred. The results of geothechnical investigation studies field, it was found to differ from the results of the original design. There may be errors parameters calculated from the results of ground investigation in such a case. And it can be estimated that it is irrational to behavior analysis of the earth retaining wall were analyzed by utilizing the parameters. And in this study, parameters that affect the earth retaining wall the correlations were analyzed using elasto-plastic method. Analysis method was changed various parameters (cohesion, subgrade reaction coefficient, load condition) applied to the elasto-plastic method. And due to a change in the behavior of earth retaining wall materials were analyzed. As a result, the cohesion greatly affects the behavior of earth retaining wall materials in various parameters. For this reason, the results of the geothechnical investigation, confirmation of the actual ground is very important in the design of the earth retaining wall. And, calculating accurate and reasonable of the cohesion of the various parameters is very important.
Effect of Ferro-nickel Slag on Contamination of Soil and Water
Park, Kyungho ; Kim, Daehyeon ; Kim, Byungho ; Go, Youngjin ;
Journal of the Korean Geosynthetic Society, volume 12, issue 4, 2013, Pages 21~33
DOI : 10.12814/jkgss.2013.12.4.021
The purpose of the study is to evaluate engineering properties of Ferro Nickel Slag (FNS) and to investigate the effects of FNS on potential contamination of surrounding soil and water through small and large chamber tests. Soil conditions in the chamber tests were made as closely as possibile to the field conditions. In order to simulate different types of water, we used fresh water, acidic water and seawater. Sand soils were made with relative densities of 40% and 60%, and clay with the degree of compaction of 90%. After flushing water through the FNS in the chambers was completed, the PH test was performed for the water flowing out of the chambers and the soil samples were collected for soil pollution analysis. Based on the results of the chamber tests, although the pollution level was slightly higher in the silt than in the sand, the environmental effect that FNS causes the surrounding soil was found to be very minimal. This indicates that FNS can be used as construction material in place of natural aggregates.
A Fundamental Study on Reinforced Soil Slope with Improved Soil Facing
Bhang, In-Hwang ; Seo, Se-Gwan ; Kim, Kwang-Leyol ; Kim, You-Seong ;
Journal of the Korean Geosynthetic Society, volume 12, issue 4, 2013, Pages 35~44
DOI : 10.12814/jkgss.2013.12.4.035
This paper presents the slope wall technique using soil improvement material for reinforced soil slope through laboratory scale model tests, and verifies the experimental results comparing with numerical analysis. In additional, case study in field has performed to investigate the deformation of reinforced soil slope for 6 months. As a result of laboratory scale model test, numerical analysis, and case study, the reinforcement effect of the slope wall technique using soil improvement material is sufficient to be constructed as reinforced soil slope. The technique shows the stable ratio (0.4%) of horizontal to vertical deformation in the surface loading.
Numerical Analysis of Offshore Wind Turbine Foundation Considering Properties of Soft layer in Jeju
Yang, Ki-Ho ; Seo, Sang-Duk ; Cho, Yee-Sun ; Park, Jeong-Jun ;
Journal of the Korean Geosynthetic Society, volume 12, issue 4, 2013, Pages 45~56
DOI : 10.12814/jkgss.2013.12.4.045
Recently, offshore wind farms are increasingly expected, because there are huge resource and large site in offshore. Jeju island has optimum condition for constructing a wind energy farm. Unlike the mainland, Jeju island has stratified structure distribution between rock layers sediments due to volcanic activation. In these case, it can be occur engineering problems in whole structures as well as the safety of foundation as the thickness and distribution of sediment under top rock layer can not support sufficiently the structure. In this paper, the settlement and stress distribution is predicted by numerical analysis when the mono-pile base are constructed on various soft layer between stratified structure. To determine the settlement of the pile foundation supported on stratified rock layer, the geological investigation at the 3 regiions and the results of laboratory experiments of the stratified rock layer is required.
Pullout Characteristics of Waste Fishing Net Reinforced Bottom Ash using Pullout Test
Kwon, Soon-Jang ; Kim, Yun-Tae ;
Journal of the Korean Geosynthetic Society, volume 12, issue 4, 2013, Pages 57~66
DOI : 10.12814/jkgss.2013.12.4.057
In this study, pullout tests were carried out to evaluate pullout characteristics of waste fishing net (WFN), which added into bottom ash for recycling both bottom ash and WFN. Three different mesh size of WFN (WFN20:
) and geogrid were added as a reinforcement. Pullout characteristics of waste fishing net were compared with those of the geogrid. Pullout test results showed that pullout strength and stiffness of WFN20 are a little less than those of geogrid. However, the pullout friction angle of WFN20 is similar to that of geogrid due to bearing resistance induced from transverse rib because thickness of WFN20 is greater than geogrid. Pullout test results also indicated that distribution of residual strain along reinforcement after test depends on overburden stress. Residual strain at the tip of reinforcement increased with an increase in overburden stress due to concentration of pullout force on the tip of reinforcement.
A Feasibility Study on GMC (Geo-Multicell-Composite) of the Leachate Collection System in Landfill
Jung, Sung-Hoon ; Oh, Seungjin ; Oh, Minah ; Kim, Joonha ; Lee, Jai-Young ;
Journal of the Korean Geosynthetic Society, volume 12, issue 4, 2013, Pages 67~76
DOI : 10.12814/jkgss.2013.12.4.067
Landfill require special care due to the dangers of nearby surface water and underground water pollution caused by leakage of leachate. The leachate does not leak due to the installation of the geomembrane but sharp wastes or landfill equipment can damage the geomembrane and therefore a means of protecting the geomembrane is required. In Korea, in accordance with the waste control act being modified in 1999, protecting the geosynthetics liner on top of the slope of landfill and installing a drainage layer to fluently drain leachate became mandatory, and technologies are being researched to both protect the geomembrane and quickly drain leachate simultaneously. Therefore, this research has its purpose in studying the drainage functions of leachate and protection functions of the geomembrane in order to examine the application possibilities of Geo-Multicell-Composite (GMC) as a Leachate Collection Removal and Protection System (LCRPs) at the slope on top of the geomembrane of landfill by observing methods of inserting filler with high-quality water permeability at the drainage net. GMC's horizontal permeability coefficient is
to legal standards satisfeid. Also crash gravel used as filler respected by vertical permeability is 5.0 cm/s, embroidering puncture strength 140.2 kgf. A result of storm drain using artificial rain in GMC model facility, maxinum flow rate of 1,120 L/hr even spray without surface runoff was about 92~97% penetration. Further study, instead of crash gravel used as a filler, such as using recycled aggregate utilization increases and the resulting construction cost is expected to savings.
The Evaluation for Pullout Performance of Steel Strip Reinforcements with Deformed-Bars as Transverse Members
Jung, Sung-Gyu ; Kim, Juhyong ; Cho, Samdeok ; Lee, Kwangwu ;
Journal of the Korean Geosynthetic Society, volume 12, issue 4, 2013, Pages 77~86
DOI : 10.12814/jkgss.2013.12.4.077
Laboratory pullout tests were conducted to evaluate pullout performance of steel strip reinforcements with deformed steel bars as transverse members. The steel strip reinforcement has an installation hole to assemble a deformed steel bar. Jumunjin standard sand is used to form a relative density of ground model to 80%. Frictional resistance of steel strip reinforcement without transverse member increases sharply at the initial displacement and quickly decreases with displacement. Maximum frictional resistance increases linearly as normal pressure increasing, and soil-reinforcement interaction friction angle(
) of a steel strip reinforcement is estimated to
. Passive resistance increases with displacement and converge into maximum passive resistance in most cases. Maximum passive resistance increases linearly as normal pressure increasing irrespective of shape of the steel reinforcement. Pullout force of steel strip reinforcements with installation holes or transverse members largely increases about 4 to 7 times compared to frictional resistance force of steel strip reinforcements when embedment length(
) of steel strip reinforcements is 500 mm. In the case of using 2 transverse members, interference effect is observed due to the spacing of 2 transverse members and location of assembly holes and transverse members.
Characteristics of Soil Parameter for Lade's Single Work-Hardening Constitutive Model with Relative Density of Bottom ash
Kim, Chan-Kee ; Lee, Jong-Cheon ;
Journal of the Korean Geosynthetic Society, volume 12, issue 4, 2013, Pages 87~98
DOI : 10.12814/jkgss.2013.12.4.087
This study was performed a series of the isotropic compression-expansion tests and the drained triaxial tests with various the relative densities 40%, 60%, 80% and 95% for bottom ash. Using the tests results the characteristic of the parameters of Lade's single hardening constitutive model were investigated. The soil parameters Kur and n representing elastic behavior are not much affected by the change of the relative density. The other parameters such as failure criterion(m,
), hardening function(c, p) and plastic potential(
) are in a positive linear relationship with the relative density. Since the soil parameters h and
representing yield function do not change much to the change of relative density and also closely related to failure criterion, they can be replaced by failure criterion
. We also observed that predicted values from the Lade's single hardening constitutive model were well consistent with the observed data.
The Lateral Load Capacity of Bored-Precast Pile Depending on Injecting Ratio of Cement Milk in Sand
Hong, Won-Pyo ; Yun, Jung-Mann ;
Journal of the Korean Geosynthetic Society, volume 12, issue 4, 2013, Pages 99~107
DOI : 10.12814/jkgss.2013.12.4.099
In order to investigation Lateral bearing capacity of bored-precast pile, we carried out the analysis of the relationship between Lateral load and horizontal displacement using the result of horizontal pile load test. The six piles injected cement milk of 50%, 70% and 100% of the embedded length of pile were used in the horizontal pile load test. The horizontal displacement, yielding load and horizontal bearing capacity are mainly affected by The injecting ratio of cement milk (injected length of cement milk/embedded length of pile). As the injecting ratio of cement milt is increased, the starting point of horizontal displacement in piles become close to the ground surface and the amount of horizontal displacement is decreased. Also, the horizontal bearing capacity and yielding load are highly increased with increasing the ration of cement milk. The horizontal bearing capacity and yielding load of bored pile with 1 of cement milk ratio are about two or three times those of pile with 0.5 of cement milk ratio.
Load Carrying Capacity of Geosynthetic Reinforced Railway Subgrade Under Cyclic Load
Hong, SeungRok ; Cho, Yungyu ; Choi, JungHyuk ; Jeong, Yongjun ; Yoo, ChungSik ;
Journal of the Korean Geosynthetic Society, volume 12, issue 4, 2013, Pages 109~121
DOI : 10.12814/jkgss.2013.12.4.109
This paper studied the characteristics of bearing capacity of railway reinforced with geosynthetic against repetitive loading of train. The railway that was based on the porous pavement substructure ground and reinforced with geosynthetic was copied. In order to analyze load carrying capacity of geosynthetic, we have had 3cases experiments - in the first case, the ground was non reinforced, second case was reinforced geocell and last case was reinforced geogrid - and all of them were reduced-scale laboratory tests. The results of the analyses indicated that the bearing capacity of the reinforced geogrid increases much more than the reinforced geocell. Residual deformation of the initial cyclic load was larger than the secondary cyclic loads.
Study of Patents Trend Regarding Technology of Reaction for Sediment Disaster
Suk, Jae-Wook ; Kim, Yong-Soo ; Lee, Jong-Gun ;
Journal of the Korean Geosynthetic Society, volume 12, issue 4, 2013, Pages 123~131
DOI : 10.12814/jkgss.2013.12.4.123
The patents trends registered in korea, the USA, Japan and Europe were analyzed to forecast the direction of R&D for the technology of sediment disaster. As a result of portfolio analysis, the number of patents in Korea have continued to rise, but have been placed behind the other countries. The level of technology of each country was investigated. In the survey technology and sensing technology, the Korean and USA situations were classified as a period of growth, and the Japanese situation was classified as a period of decline. In the control technology and protection technology, Korean situation was classified as a period of growth, and the Japanese situation was classified as a period of decline. As a result of analysis for a direction of R&D using blank technologies, standardization of analysis technologies for mechanism, fusion techniques between ICT and conventional techniques, development of eco-friendly materials and evaluation of structure should be developed by R&D in Korea.
Seismic Analysis of Ground for Seismic Risk Assessment of Architectural Heritage in Seoul
Han, Jung-Geun ; Keon, Seong-Kon ; Hong, Kikwon ;
Journal of the Korean Geosynthetic Society, volume 12, issue 4, 2013, Pages 133~141
DOI : 10.12814/jkgss.2013.12.4.133
This paper describes the earthquake risk evaluation of 15 sites of architectural heritages, which are considered ground conditions of sites in Seoul. In order to acquire the input data of earthquake response analysis, surface wave exploration was performed at the site. Earthquake response analysis and 3D earthquake safety evaluation were carried out under the base of scenario earthquakes. Ground displacements of areas, which are located on architectural heritages, are showed about 0.5 mm ~ 9.7 mm, and it was analyzed to small affected by earthquakes. In case of Naksungdae three-story stone pagoda, ground displacement is similar to the others. However, displacement of three-story stone pagoda with granite is 30 mm on the top, because the greatest occurrence of that is caused by stress release at seismic wave effect.
Basic Study for Evaluation on Application of Energy Lining Segment
Han, Sang-Hyun ; Park, Sisam ;
Journal of the Korean Geosynthetic Society, volume 12, issue 4, 2013, Pages 143~147
DOI : 10.12814/jkgss.2013.12.4.143
Geothermal energy is easy to take advantage of renewable energy stored in the earth and the heat exchanger can be collected through a heat exchange piping system. In this study, have been developed a heat exchange pipe loop system which it could be installed in tunnel segmental linings to collect geothermal energy around the tunnel. The heat exchange pipe loop system incorporated in the tunnel segments circulate fluid to transport with heat from the surrounding ground and the heat can be used for heating and cooling of nearby structures or districts. The segmental lining incorporating heat exchange pipe loop system are called as ELS (Energy Lining Segment). There are a number of examples incorporating a heat exchange pipe loop system in a tunnel lining in Europe. In this study, a field case using Energy Lining Segment in Germany and applications in urban area are thoroughly examined. In addition, a CFD (Computational Fluid Dynamics) analysis was carried out to investigate heat flow in Energy Lining Segment.