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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of the Korean Geoenvironmental Society
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Journal DOI :
Korean Geo-Environmental Society
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Volume & Issues
Volume 7, Issue 6 - Dec 2006
Volume 7, Issue 5 - Oct 2006
Volume 7, Issue 4 - Aug 2006
Volume 7, Issue 3 - Jun 2006
Volume 7, Issue 2 - Apr 2006
Volume 7, Issue 1 - Feb 2006
Selecting the target year
A Prediction of Long-Term Settlement in Large Reclamated Sites Using Laboratory Consolidation Tests and GIS Techniques
Park, Sa-Won ; Kim, Hong-Taek ; Park, Sung-Won ; Baek, Seung-Cheol ; Park, Sang-Kwon ;
Journal of the Korean Geoenvironmental Society , volume 7, issue 3, 2006, Pages 5~19
The secondary consolidation settlement of soft clay is generally very little compared to the total settlement and occurs very slowly during long-term period. However the secondary consolidation settlement is comparatively large amount in organic and heavily compressed clay and is a very important engineering factor. In order to reduce residual settlements in reclaimed soft ground, the preloading method is often used. In this study, in order to determine reasonable long-term settlements of large reclaimed site, laboratory incremental loading consolidation tests and surcharging consolidation tests are performed. Sampling was done at Incheon area of west coast and Gwangyang area of south coast in Korea. The characteristics of secondary consolidation have obtained through laboratory tests and analyzed systematically to predict long-term settlements. Additionally, the location data and laboratory test results are correlated by using GIS(geographic information system). The secondary consolidation settlement of the site was predicted based on D/B and the operation technique and estimation technique of space of GIS.
Treatment of Refractory Dye Wastewater Using AOPs
Kim, Jong-Oh ; Lee, Kwon-Ki ; Jung, Jong-Tae ; Kim, Young-Noh ;
Journal of the Korean Geoenvironmental Society , volume 7, issue 3, 2006, Pages 21~29
The treatment performance of ozonation and three types of advanced oxidation processes (AOPs) such as
was experimentally investigated for the treatment of refractory synthetic dye wastewater. The removal efficiency of
, color and biodegradability (
) were relatively evaluated in each treatment unit with simulated dye wastewater. Optimal operational conditions of pH, temperature, dosage and circulation flow rate were also investigated. All suggested processes revealed an effectiveness for the removal of color within a short operational time, moreover,
process showed the highest
removal and biodegradability enhancement among proposed oxidation process.
An Experimental Study for the Scale Effects on Shear Behavior of Rock Joint
Lee, Sang-Eun ;
Journal of the Korean Geoenvironmental Society , volume 7, issue 3, 2006, Pages 31~41
The scale effect of specimens on the shear behavior of joints is studied by performing direct shear tests on six different sizes in Granite. The peak and residual shear stress, shear displacement, shear stiffness, and dilation angle are measured with the different normal stress(0.29~2.65MPa) and roughness parameters. It is also shown that both the joint roughness coefficient(JRC) and the joint compression strength(JCS) reduce with increasing joint length. A series of shear tests show about 56~67% reduction in peak shear stress, and about 18~44% in residual shear stress, respectively as the contact area of joint increases from 12.25 to
. Also the variation of dilation angle is
at normal stress of 0.29 MPa and
at normal stress of 2.65 MPa, respectively. The envelopes considering scale effect for JRC are made for the peak shear strength of rock joint in comparison with the Barton's equation.
The Change in Geotechnical Properties of the Deposited Clay Contaminated by Leachate from Waste Disposals
Ha, Kwang-Hyun ; Lee, Sang-Eun ;
Journal of the Korean Geoenvironmental Society , volume 7, issue 3, 2006, Pages 43~54
In this paper, the uniaxial, triaxial compression tests and consolidation tests on the clay sample substituted initial pore water for pollutant were performed to evaluate the change in geotechnical properties of the contaminated clay. The contaminant transport analysis on embankment type landfill using the MT3D model was also performed to evaluate the extent of transport and diffusion. There was tendency that strength, compressibility and permeability has increased with the increase in the concentration of NaCl solution. The increase in the strength and compressibility of sample saturated with leachate was higher than samples saturated with NaCl solution, but in the permeability coefficient was lower. As the result of contaminant transport analysis, the predicted concentration was in high with the increase in the initial concentration of
ion and increased in a non-linear form. The transportation distance calculated with use of regression equation between the distance from contaminant source and the concentration of
ion was increased with the increase in the initial concentration.
Moment Equations for Long-Span Soil-Steel Box Culverts
Choi, Dong-Ho ; Lee, Seung-Jae ; Kim, Nam-Gi ;
Journal of the Korean Geoenvironmental Society , volume 7, issue 3, 2006, Pages 55~68
This paper studies the moment equations in the 2000 Canadian highway bridge code(CHBDC) for soil-steel box structures, which are applicable to the span less than 8m. Finite element analyses carried out for soil-steel box structures having spans of 3-12m using the deep corrugated steel plates under three construction stages; backfill up to the crown, backfill up to the cover depth, and live loading. The coefficients of moment equations are newly proposed based on the results of numerous finite element analyses considering various design variables, such as span length, soil depth, backfill conditions. The validity of the proposed coefficients in the moment equations of the 2000 CHBDC is investigated by the comparison with the existing coefficients and numerical results of finite element analyses. The comparisons show that the moments of the 2000 CHBDC give good predictions for the span less than 8m, but underestimate for the span greater than 8m, whereas the proposed moments give good estimates of numerical results for the spans of 3-12m.
The Stability of Strip Footing above Underground Cavity
Oh, Se-Wook ; Lee, Bong-Jik ; Bae, Woo-Seok ;
Journal of the Korean Geoenvironmental Society , volume 7, issue 3, 2006, Pages 69~76
In this study, an experimental study in sand ground that was prepared by raining method was performed for modeling the bearing capacity behavior of strip footing above a cavity. The critical range of bearing capacity of the strip footing affected by underground cavity was investigated by comparing results between experiment and theory. The size of the critical region depends on several factors such as footing shape, soil property, cavity size and cavity shape. The ultimate bearing capacity was more influenced by the depth of the underground cavity than the eccentricity of the underground. In addition, an underground cavity influences on not only the decrease of the bearing capacity, but also the differential settlement of a strip footing.
The Relationship between Loading Velocity and Ground Heaving Characteristics
Oh, Se-Wook ;
Journal of the Korean Geoenvironmental Society , volume 7, issue 3, 2006, Pages 77~83
The purpose of this study is to analyze lateral displacement behavior of clay layers in case of the banking in soft ground through model tests. Seven model tests varying with thickness of soft clay and loading velocity are performed to correlate between ground heaving and loading velocity. In case of low loading velocity, vertical settlement below loading plate and small ground heaving are obviously observed. In case of the high loading velocity, it is shown that both soil displacement at the end of a loading plate and surface heaving are large. In addition, the calculated displacements show good agreement with three cases of field measurements in clay with high moisture contents so that we can predict the range of heaving area and the amount of heaving.