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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of The Korean Society of Civil Engineers
Journal Basic Information
Journal DOI :
Korean Society of Civil Engeneers
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Volume & Issues
Volume 23, Issue 6D - Nov 2003
Volume 23, Issue 6C - Nov 2003
Volume 23, Issue 6B - Nov 2003
Volume 23, Issue 6A - Nov 2003
Volume 23, Issue 5D - Sep 2003
Volume 23, Issue 5C - Sep 2003
Volume 23, Issue 5B - Sep 2003
Volume 23, Issue 5A - Sep 2003
Volume 23, Issue 4D - Jul 2003
Volume 23, Issue 4C - Jul 2003
Volume 23, Issue 4B - Jul 2003
Volume 23, Issue 4A - Jul 2003
Volume 23, Issue 3D - May 2003
Volume 23, Issue 3C - May 2003
Volume 23, Issue 3B - May 2003
Volume 23, Issue 3A - May 2003
Volume 23, Issue 2D - Mar 2003
Volume 23, Issue 2C - Mar 2003
Volume 23, Issue 2B - Mar 2003
Volume 23, Issue 2A - Mar 2003
Volume 23, Issue 1D - Jan 2003
Volume 23, Issue 1C - Jan 2003
Volume 23, Issue 1B - Jan 2003
Volume 23, Issue 1A - Jan 2003
Selecting the target year
Estimation of Pullout Curve of Reinforced Earth Using Hyperbolic Function
Ju, Jae-Woo ; Park, Jong-Beom ; Kim, Jae-Young ; Cho, Sam-Deok ;
Journal of The Korean Society of Civil Engineers, volume 23, issue 6C, 2003, Pages 357~363
Pullout parameters mean the pullout friction angle and the pullout cohesion between soil and the reinforcement while the reinforcement embedded in the soil be pulled out and these parameters include the passive resistance as well as the friction resistance. And they make an important role in calculating the horizontal length of the reinforcement and the vertical distance of reinforcements in the reinforced earth wall. Pullout parameters are generally determined from pullout curves by pullout test which is a kind of big model test. However pullout tests give often inaccurate results because it is very difficult to remake the model ground with the same properties for several tests. In this study a new test method has been developed, named a staged pullout test. Present pullout test needs the production of model grounds more than three times for obtaining pullout parameters. However in a staged pullout test, only one model ground is needed. With one model ground, pullout tests are performed repeatedly, changing vertical loads after stopping a test when reaching about 2cm of pullout displacement. Hyperbolic function has been used as a method of estimating the entire pullout curve from 2cm of pullout curve, And in order to investigate the validity of a staged pullout test, both a present pullout test and a staged pullout test, have been performed about the same properties of model ground made with Korean standard sand and Geogrid. Test results has showed that a staged pullout test has a possibility to be used as a new pullout test method instead of a present pullout test.
Stability Analysis of Landfill Lining System Subjected to Equipment Loadings
Park, Hyun-Il ; Lee, Seung-Rae ;
Journal of The Korean Society of Civil Engineers, volume 23, issue 6C, 2003, Pages 365~372
In this paper, a method is presented for estimating the distribution of tensile force in the individual geosynthetics of lining system based on the Discrete Element Method (DEM) and also the safety factor of slope failure due to equipment that work at the slope of the lining system. Examples are shown to demonstrate the applicability of the method to the analysis of a waste landfill lining system. Effects of equipment loadings on the tensile forces induced in the individual geosynthetics and on the safety factor for the slope failure are investigated by varying the geometry of lining system.
Characteristics of Shear Strength along Boundary Planes of a Failed Slope Using Laboratory Test
Oh, Jae-Hwa ; Lee, Kwang-Chan ;
Journal of The Korean Society of Civil Engineers, volume 23, issue 6C, 2003, Pages 373~381
This paper presents the failure and shear strength characteristics of the failed slope in residual soil. Field investigations and laboratory tests performed on three different sites showed that the mode of slope failure was a mixed one. i.e., translational or noncircular sliding, and that the ratio of the length to the depth of failure was evaluated between 6.2% and 10.5%. The results of laboratory tests for sites GSS-1 and GSS-2 indicated that cohesions decreased up to 98.9% and friction angles were smaller than the others. In site GSS-3 both cohesion and friction angle decreased slightly. For the failure surface, the common characteristics of these three sites were that the water content increased 5% up to 10%, and that quantity of water which is required to saturate soil in a slope appeared to be 2.5 times larger or more than original soil mass. Decrease of shear strength corresponding to water content was changed by 25% up to 45%. Matric suctions of site GSS-1 and GSS-2 by rainfall decreased up to 98.5%.
Estimation of Bearing Capacity for Dreged and Reclaimed Ground Related to Thickness of Dessication Layer
Kim, Ju-Hyun ; Jeong, Sang-Kug ; Lee, Song ;
Journal of The Korean Society of Civil Engineers, volume 23, issue 6C, 2003, Pages 383~388
Horizontal vacuum drain test was put in operation for surface layer improvement of dredged and reclaimed ground and bearing capacity factors was calculated dividing upper dessication layer and lower soft layer undrained shear strength in this research. It was got following conclusion through comparison of button's and Brown&Meyerhof's equation with experimental result that was obtained by 2 dimensions model loading test. Brown&Meyerhof(1969)'s equation was under-estimated comparing with loading test result, while Button(1953)'s equation was overestimated comparing with loading test result applied dividing as double layers of upper dessication layer and lower soft layer about dredged and reclaimed ground. Also, bearing capacity factors, Nc that was calculated by using button's equation was estimated greatly about 1.7 times more than bearing capacity factors, Nc that was calculated by using Brown&Meyerhof's equation. Bearing capacity factors, Nc that was calcuated by using Brown&Meyerhof's and Button's equation was evaluated each
times smaller than bearing capacity factors, Nc=5.14 that was calcuated by using Meyerhof's equation in case of unit layer.
Evaluation of Representative Rigidity Index of Korean Soft Deposit for Piezocone Test and Its Application to Estimation of Horaizontal Coefficient of Consolidation
Park, Yong-Won ; Gu, Nam-Sil ; Kim, Young-Sang ;
Journal of The Korean Society of Civil Engineers, volume 23, issue 6C, 2003, Pages 389~398
In this study, unconfined compression test and triaxial test were performed to evalute a representative rigidity index (
) of Korean soft deposit, which should be required to estimate a coefficient of consolidation from the piezocone dissipation test. From these test results, representative rigidity indices were proposed as 27 for the western coast soft deposit, 29 for the sourthern coast soft deposit, and 22 for the eastern coast soft deposit. Those proposed rigidify indices were applied to analyse piezocone dissipation test to estimate horizontal coefficients of consolidation.
estimated from the piezocone using representative regidity index match with
from the results of laboratory tests (oedometer test and Rowe cell test) well. Furthermore, it was found that Torstensson's (1975, 1977) cylindrical cavity expansion solution and Teh & Houlsby's (1991) theoretical solution present more appropriate
from the piezocone dissipation test with representative rigidity index. It is recommended to apply the proposed representative rigidity index to estimate the coefficient of consolidation from the piezocone test when a reliable rigidity index value is not available.
Study on Consolidation Behavior of Soft Clay Ground Improved by Plastic Board Drain
You, Seung-Kyong ;
Journal of The Korean Society of Civil Engineers, volume 23, issue 6C, 2003, Pages 399~406
A series of model tests on soft clay ground improved by plastic board drain (PBD) and their numerical analyses were carried out. in order to investigate the consolidation behavior of the improved ground. In the model tests, excess pore pressures in clays as well as applied loads and settlements of the model ground were measured. The applicability of numerical analyses, in which an elasto-viscoplastic three-dimensional consolidation finite element method is applied, was confirmed through comparison between experimental and analytical results. Another series of numerical analyses, in which vertical drainage is prevented, was carried out, in order to investigate the effect of vertical drainage on the consolidation behavior in the model tests. As the results, it was elucidated that the consolidation behavior in the model tests was affected not only by radial drainage but also by vertical drainage. Then consolidation characteristics by PBD under condition of non-drainage vertical direction were estimated through considerations about distribution of excess pore pressures in clay ground.
Numerical Studies for the Characteristics of the Multi-Channel SASW Method
Lee, Il-Wha ; Joh, Sung-Ho ;
Journal of The Korean Society of Civil Engineers, volume 23, issue 6C, 2003, Pages 407~415
The SASW method is a promising and effective way of profiling ground stiffness nondestructively. This method has been successfully applied to many geotechnical sites, but significant lateral variability, embedded obstacles, and pavement lead to the low reliability. To improve these problems, a new procedure, called the "multi-channel SASW method" has been introduced to improve the reliability of the stiffness profile determined by the SASW method. To understand wave propagation in the complex profile, FEM analysis on artificial profiles has been performed, which proved the validity of the multi-channel SASW technique. Also, a characteristic of performing the conventional method and the multi-Channel SASW method developed in this study was estimated.
Estimation of Pullout Force with Using Chain Reinforcement
Kim, Sang-Su ; Lee, Jong-Kyu ; Oh, Se-Wook ; Bae, Woo-Seok ;
Journal of The Korean Society of Civil Engineers, volume 23, issue 6C, 2003, Pages 417~424
The application of the reinforced earth structures has been rapidly increased due to its outstanding economical advantages, esthetics and ease of construction during last three decades. As it is well known, the reinforced earth structures composes generally three main elements; i.e., facing, reinforcement, and backfill material. The reinforcements play especially a important role in the reinforced earth structure and many kinds of reinforcement which use various material and shape were developed, and have been applied in the around world. In this study, the chain was adapted as a new reinforcement and a series of experiments were performed to investigate the pullout characteristics of chain in laboratory. In the experiments, several tests for evaluating elements of chain pullout force were performed. For evaluating the pullout characteristics of chain reinforcements, the experimental results were compared with the results of other reinforcement and several theories.