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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of the Korean Geoenvironmental Society
Journal Basic Information
Journal DOI :
Korean Geo-Environmental Society
Editor in Chief :
Volume & Issues
Volume 12, Issue 12 - Dec 2011
Volume 12, Issue 11 - Nov 2011
Volume 12, Issue 10 - Oct 2011
Volume 12, Issue 9 - Sep 2011
Volume 12, Issue 8 - Aug 2011
Volume 12, Issue 7 - Jul 2011
Volume 12, Issue 6 - Jun 2011
Volume 12, Issue 5 - May 2011
Volume 12, Issue 4 - Apr 2011
Volume 12, Issue 3 - Mar 2011
Volume 12, Issue 2 - Feb 2011
Volume 12, Issue 1 - Jan 2011
Selecting the target year
Effect of Vibration on Characteristics of Lightweight Air-Trapped Soil
Lee, Young-Jun ; Kim, Sung-Won ; Park, Lee-Keun ; Kim, Tae-Hyung ;
Journal of the Korean Geoenvironmental Society , volume 12, issue 4, 2011, Pages 5~15
This study is conducted to find out the effect of vibration on cure and compressive strength of lightweight Air Trapped Soil(ATS). If ATS is used next to a structure existed, the effect of vibration problems may be occurred, because there exist many sources of vibration such as pile driving, blasting and use of construction machinery. For example, if a road is expanded to reduce traffic congestion, it is expected that ATS's quality may be decreased due to vibration generated by cars moving on the road. Especially, because ATS has many air bubbles and needs a time for curing, the effect of vibration is more serious than we expected. So far, the effect of vibration on concrete has been conducted, but the study of ATS has not been conducted in detail. Therefore, for evaluating the effect of vibration on ATS during cure proceeds, unconfined compression tests are conducted on the samples prepared with different variables including vibration velocity, time when vibrated and mixing ratio. The results clearly show the effect of vibration on the characteristics of ATS.
A Study on the Characteristics of Alkali Silica Sol Grouting Material
Cho, Young-Hun ; Kim, Chan-Ki ; Chun, Byung-Sik ;
Journal of the Korean Geoenvironmental Society , volume 12, issue 4, 2011, Pages 17~24
For the purpose of cut off and ground stabilization, water glass chemical grouting method using sodium silicate has problems of weakening durability and ground water pollution because leaching was conducted when the homogel is exposed to the ground water as time elapses. The purpose of this study is to identify the effect of alkali silica sol ground injection materials, it was compared with the sodium silicate ground injection materials using water glasses. For sodium silicate and alkali silica sol by mixing each case is divided into four different specimens were made and tested. The characteristic of alkali silica sol ground injection material was analyzed by unconfined compression test and environmental impact statement of ordinary portland cement and blast furnace slag cement. Alkali silica sol specimens were made mixing A-solution and B-solution in the proportion of one on one. Through this study, alkali silica sol ground injection mixing blast furnace slag cement has excellent strength and environment-friendly.
The Study of Statistical Optimization of 1,4-dioxane Treatment Using E-beam Process
Hwang, Hae-Young ; Chang, Soon-Woong ;
Journal of the Korean Geoenvironmental Society , volume 12, issue 4, 2011, Pages 25~31
In this study, the experimental design methodology was applied to optimize 1,4-dioxane treatment in E-beam process. Main factor was mathematically described as a function of parameters 1,4-dioxane removal efficiencies(%), TOC removal efficiencies (%) modeled by the use of the central composite design(CCD) method among the response surface methodology(RSM). Concentration of 1,4-dioxane is designated as "
" and Irradiation intensity is designated as "
". The regression equation in coded unit between the 1,4-dioxane concentration and removal efficiencies(%) was
. The regression equation in coded unit between the 1,4-dioxane concentration and TOC removal efficiencies(%) was
. The model predictions agreed well with the experimentally observed results
(Adj) over 90%. Toxicity test using algae Pseudokirchneriella Subcapitata showed that the inhibition was reduced according to increasing an E-beam irradiation.
A Study on Lateral Displacement of Caisson Constructed on Improved Ground
Kim, Myung-Hak ; Lee, Sang-Wook ; Yoon, Min-Seung ; Han, Byung-Won ;
Journal of the Korean Geoenvironmental Society , volume 12, issue 4, 2011, Pages 33~41
In case of building up port facilities on soft ground, unsymmetrical surcharge of embankment, which make the excess pore water pressure to increase, causes to occur lateral displacement due to plasticity of soil. A study on lateral displacement and settlement of the caisson, which is installed on improved ground, was accomplished. The field measurement data and calculated values obtained from FEM program of Plaxis were compared and analyzed. For numerical analysis, the properties of soils, constructions stage and time were considered. Lateral displacement was measured at the point of inclinometers installed in front of caisson. Settlement was measured at the center of extra embankment behind of caisson. Comparison of measured and calculated for lateral displacement showed that the calculated value was greater than the measured, and increasing trend was different. The calculated value showed step increasing as step extra embankment applied, whereas the measured gradually was increased. For settlement of embankment, the amount of both measured and calculated were similar, but the trend was different like that of lateral movement.
Lateral Earth Pressures and Displacements through Full Scaled Lateral Loading Test of Concrete Electric Pole Embedded in Ground
Ahn, Tae-Bong ;
Journal of the Korean Geoenvironmental Society , volume 12, issue 4, 2011, Pages 43~51
Many electric poles in the softground have been collapsed due to external load. In this study, 10 types of tests were performed with variation of location, numbers and depths of anchor blocks as well as depth of poles to find horizontal earth pressure through full scale pull-out tests. The horizontal earth pressure increased with embedded depth of electric pole, and earth pressure of lower passive zone decreased. The deeper of anchor block, earth pressure of passive zone becomes less. lateral displacements showed differences depending on location, numbers and depth of poles. The bending is generated in the upper part at the initial load, but it moved to central part as load increased. The maximum horizontal displacement decreased to 1/1.6 at -0.5m depth of anchor block and 1.3m additional laying depth of poles into ground.
Evaluation of Applicability of Impulse function-based Algorithm for Modification of Ground Motion to Match Target Response Spectrum
Kim, Hyun-Kwan ; Park, Du-Hee ;
Journal of the Korean Geoenvironmental Society , volume 12, issue 4, 2011, Pages 53~63
Selection or generation of appropriate input ground motion is very important in performing a dynamic analysis. In Korea, it is a common practice to use recorded strong ground motions or artificial motions. The recorded motions show non-stationary characteristics, which is a distinct property of all earthquake motions, but have the problem of not matching the design response spectrum. The artificial motions match the design spectrum, but show stationary characteristics. This study generated ground motions that preserve the non-stationary characteristics of a real earthquake motion, but also matches the design spectrum. In the process, an impulse function-based algorithm that adjusts a given time series in time domain such that it matches the target response spectrum is used. Application of the algorithm showed that it can successfully adjust any recorded motions to match the target spectrum and also preserve the non-stationary characteristics. The modified motions are used to perform a series of nonlinear site response analyses. It is shown that the results using the adjusted motions result in more reliable estimates of ground vibration. It is thus recommended that the newly adjusted motions be used in practice instead of original recorded motions.