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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 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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An Experimental Study for Substitutability of Sand Mat with Precious Slag Ball
Shin, Eun-Chul ; Lee, Woon-Hyun ; Kang, Jeong-Ku ;
Journal of the Korean Geosynthetic Society, volume 9, issue 2, 2010, Pages 1~9
At present, the sand mat method is actively used for improvement of soft ground. But, there are some problems related with sand mat which has been used as a way to accelerate consolidation settlement. First of all, insufficiency of sand due to imbalances in market supply and demand is the one of the biggest problems, which makes price high of sand and delays a term of total construction work. Moreover, it is necessary to preserve integrity of environment from natural disruption caused by indiscreet quarrying and dredging operation to supply sand for soil improvement construction site. This paper presents the feasibility study to use of Precious Slag Ball instead of sand mat as the replacing material through the basic soil property tests, the medium of discharge capacity test and analysis of settlement property. It is also evaluates the performance of Precious Slag Ball as a sand mat in terms of discharge capacity, ground settlement by the K-Embank program based on field experimental work.
Discharge Capacity for Vertical Drain Boards with Hydraulic Gradient Variation
Kim, Ju-Hyong ; Lee, Kwang-Wu ; Cho, Sam-Deok ; Chang, Gap-Shik ;
Journal of the Korean Geosynthetic Society, volume 9, issue 2, 2010, Pages 11~20
This paper studies the discharge capacity of vertical drain boards that is controlling hydraulic gradient among many factors in the specification. The KS K 0940(2008), a testing method based on the conventional Delft type method for measuring the discharge capacity of a vertical drain, was specified in Korea Standard recently. In this test method, the variation in hydraulic gradient can result in large differences in the discharge capacity for the same vertical drain board.
The Analysis of Excavation Behavior Considering Small Strain Stiffness
Kim, Young-Min ;
Journal of the Korean Geosynthetic Society, volume 9, issue 2, 2010, Pages 21~31
This paper describes research on the prediction of the vertical displacement of surface, horizontal displacements and bending moments in two anchored retaining wall for an excavation by a finite element program. It is very important to consider the appropriate constitutive model for the numerical analysis in excavation behavior. It is shown in this paper that the analyses of excavation considering small strain stiffness gives the more reasonable prediction of the vertical displacement of surface. and the parametric study on the small strain stiffness parameters for excavation analysis has been analysed.
Evaluation on Bearing Resistance of Transverse Members in Steel Strip Reinforcement using Pullout Tests and Theoretical Equations
Han, Jung-Geun ; Yoon, Won-Il ; Hong, Ki-Kwon ; Hong, Won-Pyo ; Lee, Kwang-Wu ; Cho, Sam-Deok ;
Journal of the Korean Geosynthetic Society, volume 9, issue 2, 2010, Pages 33~40
In this study, the pullout tests are conducted to evaluate pullout resistance of steel strip reinforcement with transverse members. The test results are compared with theoretical equations and then the failure mechanism of transverse members is evaluated. The bearing resistance stress(
) of transverse members, which is applied pullout force at 50mm displacement, is closed from punching shear failure to general shear failure. The behavior by increment of a number of transverse members became closer to general shear failure. The behavior of transverse members at maximum pullout force, which is closed to general shear failure, is indicated that it is unrelated to normal stress and a number of transverse members. However, if the allowable displacement of reinforced soil wall is considered, it is impossible to apply in design. The test results are compared with bearing resistance evaluations using Prandtl's plastic theory and cylindrical cavity expansion theory. The analysis results are indicated that the bearing resistance by pullout tests is closed to predicted result by Prandtl's plastic theory, which are located between general shear failure and punching shear failure.
Numerical Analysis on the Crack Control of Concrete Lining Reinforced by Composite Fibers
Yang, Woo-Shik ;
Journal of the Korean Geosynthetic Society, volume 9, issue 2, 2010, Pages 41~50
The concrete lining of a tunnel constructed by NATM used to be regarded as facing material which does not support any load from the surrounding ground. But the recent appraisal of the decrepit tunnels revealed that rockbolts and shotcrete deteriorate with time resulting in loss of supporting capability. Consequently, concrete lining has to support part of the load which used to be supported by rockbolts and shotcrete, and thus should be regarded as the final supporting structure in a tunnel. One of the common, and perhaps the most serious problem in concrete lining is the longitudinal cracks taking place at the tunnel crown. The longitudinal cracks, mostly related to the construction procedures, can be developed by many reasons such as the lack of thickness, wrong materials, bad curing environment, and excessive external forces. Many efforts has been made to control and suppress these cracks but efficient and economic way is yet to be found. For efficient crack control in concrete lining, reinforcement by composite fibers, which is the mixture of steel fiber and nylon fiber, is suggested in this study.