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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of the Korean Geotechnical Society
Journal Basic Information
Journal DOI :
Korean Geotechical Society
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Volume & Issues
Volume 25, Issue 12 - Dec 2009
Volume 25, Issue 11 - Nov 2009
Volume 25, Issue 10 - Oct 2009
Volume 25, Issue 9 - Sep 2009
Volume 25, Issue 8 - Aug 2009
Volume 25, Issue 7 - Jul 2009
Volume 25, Issue 6 - Jun 2009
Volume 25, Issue 5 - May 2009
Volume 25, Issue 4 - Apr 2009
Volume 25, Issue 2 - Feb 2009
Volume 25, Issue 1 - Jan 2009
Selecting the target year
Expansion Ratio and Ultimate Load of Pulse-Discharge Bulbed Anchors
Kim, Nak-Kyung ; Kim, Sung-Kyu ; Joo, Yong-Sun ; Seo, Hyo-Kyun ; Kim, Sun-Ju ;
Journal of the Korean Geotechnical Society, volume 25, issue 7, 2009, Pages 5~10
The ground anchor is not usually used in soft clay and loose sand, because the pullout resistance of anchors can not be guaranteed. However, there is a method to increase the capacity of anchors using electric discharge geotechnical technologies, which are also known as pulse discharge and electric-spark technologies. The pulse-discharge anchor has a bulbed (or underreamed) bond length that is expanded by high voltage electrokinetic pulse energy. 24 anchors were installed in the weathered soil and sandy clay at the Geotechnical Experimentation Site at Sungkyunkwan University in Suwon, Korea. In this study, in order to define a relation between expansion rate of the anchor diameter and ultimate load, anchor load tests were carried out in accordance with testing procedures by AASHTO (AASHTO 1990) and FHWA (Weatheb 1998). And then several anchors were exhumed to measure the diameter of the pulse discharge anchors.
New High-performance Supporting System of Shallow Tunnel in Soil
Kim, Sang-Hwan ; Yun, Seung-Gi ;
Journal of the Korean Geotechnical Society, volume 25, issue 7, 2009, Pages 11~21
This paper presents a new high-performance supporting system of the shallow tunnel. In order to perform this research the mechanism of new supporting system is suggested and compared with the conventional existing supporting system. It is found that the new supporting system as pre-support system has several advantages such as improvement of ground before tunnel excavation and increment of capacity of the tunnel support. The construction procedures of this supporting system are also reviewed. In addition, the numerical simulation is carried out to evaluate the new supporting system. It is found that the new high-performance supporting system is very applicable in shallow depth tunnel such as portal area, tunnel in soil and weak zone, and so on.
Evaluation of Bearing Capacity of Piled Raft Foundation on OC Clay Using Centrifuge and Numerical Modeling
Park, Jin-Oh ; Chao, Yun-Wook ; Kim, Dong-Sao ;
Journal of the Korean Geotechnical Society, volume 25, issue 7, 2009, Pages 23~33
In this study the characteristics of piled raft was investigated by using both centrifuge and numerical modeling. The ultimate bearing capacities of single pile, unpiled raft, freestanding pile group and piled raft were compared in order to investigate load sharing of each element : pile and raft. The comparison determined parameters to simply evaluate the ultimate bearing capacity of piled raft. Centrifuge test results were simulated by numerical simulation to verify the parameters.
Pullout Resistance of Pressurized Soil-Nailing by Cavity Expansion Theory
Seo, Hyung-Joon ; Park, Sung-Won ; Jeong, Kyeong-Han ; Choi, Hang-Seok ; Lee, In-Mo ;
Journal of the Korean Geotechnical Society, volume 25, issue 7, 2009, Pages 35~46
Pressure grouting is a common technique in geotechnical engineering to increase the stiffness and strength of the ground mass and to fill boreholes or void space in a tunnel lining and so on. Recently, the pressure grouting has been applied to a soil-nailing system which is widely used to improve slope stability. The soil-nailing design has been empirically performed in most geotechnical applications because the interaction between pressurized grouting paste and the adjacent ground mass is complicated and difficult to analyze. The purpose of this study is to analyze the increase of pullout resistance induced by pressurized grouting with the aid of performing laboratory model tests and field tests. In this paper, two main causes of pullout resistance increases induced by pressurized grouting were verified: the increase of mean normal stress and the increase of coefficient of pullout friction. From laboratory tests, it was found that dilatancy angle could be estimated by modified cavity expansion theory using the measured wall displacements. The radial displacement increases with dilatancy angle decrease and the dilatancy angle increases with injection pressure increase. The measured pullout resistance obtained from field tests is in good agreement with the estimated one from the modified cavity expansion theory.
Evaluation of Traffic Load and Moisture-Induced Nonlinear In-situ Stress on Pavement Foundation Layers
Park, Seong-Wan ; Hwang, Kyu-Young ; Jeong, Mun-Kyoung ; Seo, Young-Guk ;
Journal of the Korean Geotechnical Society, volume 25, issue 7, 2009, Pages 47~54
Better understanding of in-situ mechanical behavior of pavement foundations is very important to predict long-term effects on the system performance of transport infrastructure. For this purpose resilient stiffness characterization of geomaterials is needed to properly adopt such mechanistic analysis under both traffic and environmental loadings. In this paper in-situ monitoring data from KHC test road were used to analyze the non-linear response using finite element method for a selected constitutive model of foundation geomaterials, and the results were compared with the field data.
Consideration of Geosynthetics Chemical Resistance Test for Long-Term Performance Evaluation
Jeon, Han-Yong ; Jang, Yeon-Soo ;
Journal of the Korean Geotechnical Society, volume 25, issue 7, 2009, Pages 55~64
In this study, improved test methods, which consider the real site test conditions, were suggested to measure for geosynthetics chemical resistance. For this purpose index and performance tests were done to specify and regulate the test method most approaching to the installation condition and accelerated model by Arrhenius equation was applied to interpretate the experimental data. Through the analysis and comparison of the overall experimental results, we could suggest the possibility and setup of the advanced chemical resistance test method for geosynthetics fitting to the field installation conditions.