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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 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 Verification for Determination of Soil Properties Using Field Measurement and Back Analysis
Lee, Kyujin ; Lee, Sangjo ; Yoon, Hyeongsuk ;
Journal of the Korean Geoenvironmental Society , volume 7, issue 5, 2006, Pages 5~11
A primary factor affecting on the design of soft ground is to determine the soil properties (Compression index, Coefficient of consolidation) and the depth of soft ground. It could be the basic sources to estimate settlement behavior of soft ground. Even though the reliable soil examination equipment was used to examine soil to determine the depth of soft ground, it's very hard to find out the accurate properties of soft ground, because the condition of indoor experiment cannot reproduce the circumstances of ground perfectly. Therefore, this study was re-estimated to find out the most reliable soil properties by using back-analysis with field monitoring data of "Site preparation for Airplane Mooring of Incheon International Airport Phase II Development" for 317days.
A Study on the Correlation between Standard Penetration Resistance Value and Static Cone Penetration Resistance Value of the Soft Ground Subsurface of Yongdong Area
Kim, Jinam ; Park, Heunggyu ;
Journal of the Korean Geoenvironmental Society , volume 7, issue 5, 2006, Pages 13~20
We have conducted standard penetration tests and static cone penetration tests that are widely used the land base examination on the soft ground subsurface of Yongdong area, and examined the correlation between them. We have also made a comparative analysis of the correlation between the indoor tests on the materials collected on the site and on-the-spot penetration tests. The results are as follows : The relationship between Standard Penetration Test N-value and Dutch Cone Tset show
for organic soil,
for silty sand, and
for sand. In this case of sand
increases when the soil particles are larger. The relationship between standard penetration test N-value and Unconfined Compression Strength
for organic soil,
for clay, and
Bearing Capacity Characteristics of the Light Weight Method Used Recycled EPS Beads
Lee, Jongkyu ; Lee, Bongjik ; Oh, Sewook ;
Journal of the Korean Geoenvironmental Society , volume 7, issue 5, 2006, Pages 21~29
Light weight filling method prevents settlement of ground by decreasing the weight of fills. This method is increasingly used for it's convenience and workability. Styrofoam is increasingly used as a lightweight filling material in soft ground. The beneficial effects of the use of EPS derive from minimizing the stress increment, increasing the bearing capacity and reducing the settlement. For this study, model test and FEM analysis of bearing capacity is carried out composing two-layered ground with clay in the lower layer and lightweight filling material in upper layer. Based on the results obtained here in this study, it is concluded that the use of recycled EPS beads is acceptable lightweight fill. Light weight fills used for disposal is superior to typical embankment fills in bearing capacity.
Shear Strength Characteristics of Unsaturated Dredged Soils by Triaxial Compression Tests
Kang, Jongbeom ; Bae, Wooseok ; Lee, Bongjik ;
Journal of the Korean Geoenvironmental Society , volume 7, issue 5, 2006, Pages 31~39
In this study, modified triaxial compression tests were carried out to investigate the characteristics of shear strength of unsaturated dredged soils. The variation of shear strength generally depends on more matric suction than drained conditions, and then is gradually converged in matric suction 100kPa. It indicates that the effective angle of internal friction and effective cohesion in unsaturated conditions increase due to degree of saturation, namely, matric suction than those of saturated conditions. Therefore, it shows that apparent friction angle,
due to the variation of matric suction to evaluate reasonable shear strength parameters in unsaturated soils should be considered.
The Earth Pressure Distribution of Crib Wall
Oh, Sewook ; Kwon, Youngcheul ; Bae, Wooseok ;
Journal of the Korean Geoenvironmental Society , volume 7, issue 5, 2006, Pages 41~48
Crib wall is one of the segmental grid retaining walls using headers and stretchers to establish the framework of the wall. In this method, grids formed by the intersection of headers and stretchers are generally filled with the gravel to maintain the weight of the wall. Therefore, the construction can be carried out with higher speed and much economically when compared with the concrete retaining wall. Furthermore, it has high drain capacity, and environmentally friendly aspects also have been pointed out because the possibility of the planting at the front of the wall. However, in the crib wall method, the relative movement between the individual headers and stretchers was generally recognized, and stress redistribution in the gravel filling was also observed when subjected to the external loading and self-weight of filling. Therefore, it has been thought that the distribution of the earth pressure in the crib wall system differ from that of the concrete retaining wall. In this study, the surcharge tests using the scaled model crib wall was carried out to observe the distribution of the earth pressure in the segmental grid retaining wall. The earth pressure was measured in the six specified height of wall, and the distribution of the pressure was analyzed. Furthermore, the earth pressure by computation or by the test using the concrete retaining wall was also considered to make comparison.
Fundamental Studies on Stabilization of Shallow Slope Failure Using Lime Pile - Changes of Clayey Properties with Lime Addition -
Kwon, Moonam ; Goo, Jeungmin ;
Journal of the Korean Geoenvironmental Society , volume 7, issue 5, 2006, Pages 49~55
Quick lime made from limestone that are deposited abundantly in Korea has excellent potentials for stabilization of clayey soils. If Korea is able to take advantage of its abundant supply, economical efficiency could be achieved through mass production as well as being able to take advantage of utilization of natural resources. For stabilizing of clayey soil with lime, it is necessary to determine the required quantities of lime firstly and to evaluate the degree of stabilization with lime content. In this test, the quantity of lime required for 2 clayey soils which located in Seunggok and Bugok province respectively, and for 2 clay minerals-kaolinite and montmorillonite-were determined by ASTM C 977-92 and were evaluated for solidification of each samples with changing lime contents by Atterberg limit test and pH test. It was also evaluated for the improvement of each sample with lime content and curing time. The sample which added lime content determined by ASTM C 977-92 increased plastic limit, unconfined compression strength, and decreased pH in increasing trend.
Centrifuge Modeling on Displacement Shapes of Composite Ground Improved by SCP and GCP
Heo, Yol ; Zheng, Zhaodian ; Lee, Cheokeun ; Ahn, Kwangkuk ;
Journal of the Korean Geoenvironmental Society , volume 7, issue 5, 2006, Pages 57~66
In this study, the centrifuge model tests were carried out to evaluate the stress concentration ratio, the deformation modes of piles and the ground movement in clay deposit improved by SCP and GCP piles with changing the replacement ratio(20%, 40%, 60%) under flexible loading. Based on the results obtained, it was shown that the stresses acting on GCP was larger than those acting on SCP with the same replacement ratio. It was evaluated that the average stress concentration ratio of soft clay ground improved by GCP was slightly larger than that of SCP when the replacement ratio is 40%. Only expansion failure occurred in GCP, whereas SCP showed the expansion and shear failure simultaneously.
A Study on the Characteristic of Bearing Capacity in Sandy Ground Reinforced by a Layer of Geotextile
Park, Yongboo ; Joo, Ingon ;
Journal of the Korean Geoenvironmental Society , volume 7, issue 5, 2006, Pages 67~77
Bearing capacity of soil can be improved by several conventional ground improvement techniques like stabilization and compaction. Recently, the necessity on the reseaches for the bearing capacity of footing reinforced by Geotextile is being significantly increased. In this paper, a series of model tests on sandy ground reinforced by a layer of Geotextile were performed under plane strain condition, and the effects of bearing capacity improvement and behaviour of sandy ground were observed through tests for position and horizontal length, material strength of reinforcement.
A Numerical Study on Dispersion of Inert Particles in a Rough Single Fracture
Jeong, Woochang ;
Journal of the Korean Geoenvironmental Society , volume 7, issue 5, 2006, Pages 79~87
This paper presents the numerical model developed to simulate the solute transport in rough and smooth single fractures. The roughness of these fractures is represented by using the fractal surface method. In this study, the 3D transport model, which is based on the random walk technique, is used to simulate the dispersion process of a solute which is represented by numerical particles. As the simulation results, it can be observed that the dispersion of solute in the fracture is significantly affected by the fracture roughness and particle size.