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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 9, Issue 7 - Dec 2008
Volume 9, Issue 6 - Oct 2008
Volume 9, Issue 5 - Aug 2008
Volume 9, Issue 4 - Jun 2008
Volume 9, Issue 3 - Apr 2008
Volume 9, Issue 2 - Feb 2008
Volume 9, Issue 1 - Jan 2008
Selecting the target year
Study on Pullout Behavior of Pipe Anchor
Bae, Woo-Seok ; Lee, Bong-Gik ; Kwon, Young-Cheul ; Lee, Jun-Dae ;
Journal of the Korean Geoenvironmental Society , volume 9, issue 1, 2008, Pages 5~10
In this study, laboratory model test was performed to estimate pullout behavior of pipe type anchor with surface roughness, embedment and diameter. The design of buried pipe anchors in areas of vertical ground movement is governed, in part, by magnitude of the forces imposed on the pipe and displacements at which they are developed. In this paper, uplift resistance and displacement characteristics of pipe anchors caused by ground condition and embedment ratio, surface roughness, pipe diameter through the analysis of pipe anchor model test were compared and analyzed. The test results of the buried pipe showed that as the relative density increases, ultimate uplift resistance increase in 20%. When pipe anchor is failed with the relative density of the ground, the change of surface roughness, it was shown that the deformation increases as the ratio of penetration increases from 2 to 8 in five times approximately. And most anchor-based theories overestimate the breakout factor.
Vertical Earth Pressure on Buried Pipes in Ditches due to Fills
Park, Sang-Won ; Do, Jong-Nam ; Jung, Jong-Ju ; Chun, Byung-Sik ;
Journal of the Korean Geoenvironmental Society , volume 9, issue 1, 2008, Pages 11~16
In this paper, vertical earth pressure by CANDE program is compared with that by some equations such as the equation by Janssen, Marston, Spangler, and Handy to calculate vertical earth pressure with respect to several factors acting on a rigid buried-pipe filled cohesionless soil. As a result of comparative analysis of vertical earth pressure with each equation, primary factors are affected by backfill width, backfill depth and wall friction. Moreover, vertical earth pressure is linearly increased with backfill depth and width from results of the finite element method. Handy's Equation is reasonable for finite element method while Marston equation is overestimated in case of the design of buried-pipe and box.
Assessment of External and Internal Corrosion Growth Rate for Metallic Water Pipes
Bae, Chul-Ho ; Kim, Ju-Hwan ; Kim, Jeong-Hyun ; Hong, Seong-Ho ;
Journal of the Korean Geoenvironmental Society , volume 9, issue 1, 2008, Pages 17~25
In this study, external and internal pit growth rate model and external non-linear regression corrosion model were proposed by measuring pit depths and evaluating various soil factors known to contribute to the corrosion for metallic water pipes. Average pit depths of external and internal for metallic water pipes were measured 1.38 mm and 2.13 mm, and internal pit growth rate also fasted twice than external pit growth rate. This means the corrosion potential of water quality was higher than soil. The corelation between external corrosion rate and each soil corrosion factor was low. However, proposed external non-linear regression corrosion model considering all soil corrosion factors showed a little higher correlation (
=0.46) than conventional model.
Evaluation of Disturbance of Clay Samples Due to Sampling Methods
Yoon, Yeo-Won ; Kim, Young-Jin ; Choi, Eun-Ho ;
Journal of the Korean Geoenvironmental Society , volume 9, issue 1, 2008, Pages 27~31
In this study, evaluation of samples' reflection of in-situ condition was performed for those by 225 mm KICT large sampler and NX size piston sampler. Disturbance analysis was conducted for the clay sampled by two kinds of sampler throughout consolidation tests, uniaxial tests and triaxial test, under the same condition. From the analysis it can be seen that not only the initial void ratio and preconsolidation pressure from KICT large sampler but strength parameters from both uniaxial and triaxial compression tests are also about 10% higher than those of NX size piston sampler's.
A Experimental Study on the Variation of the Pore-water Pressure in the Soil Slope during the Rainfall
Jeung, Eu-Jung ; Kim, Hong-Taek ; Jang, Hyun-Ik ; Kim, Kyung-Suk ; Kang, In-Kyu ;
Journal of the Korean Geoenvironmental Society , volume 9, issue 1, 2008, Pages 33~40
In this research, model tests have been performed for researching the seepage characteristics in the finite soil slope during the rainfall using a manufactured rainfall simulator. On the basis of the results, it has been analyzed how to change the seepage characteristics due to the duration time of rainfall. We are found that the pore-water pressure was gradually increased as increasing the duration time of rainfall. Specially, at the beginning of rainfall, the pore-water pressure in the middle surface of slope was measured larger than any point. As increasing the duration time of rainfall, the pore-water pressure at the inner part of slope was increased greatly at the collapse due to infiltrating the pore-water within the slope. In the research, it was not easy to get various test results because measuring instruments are high sensitivity and difficult to handle. For the future, the model test results are needed for the various slope angle.
Load Transfer Characteristics and Ultimate Bearing Capacity of PHC Pile in Deep Soft Clay Layer
Lee, Yong-Hwa ; Kim, Myung-Hak ;
Journal of the Korean Geoenvironmental Society , volume 9, issue 1, 2008, Pages 41~46
In this study, the analysis of load transition of PHC pile was performed with the static load test, which was driven in deep soft clay layer of MyungJi site in the western area of Pusan. The results of test showed that the range of unit side resistance of pile in sand layer were
in the soft clay layer, while the unit base resistance was
in dense silty sand layer. To select the most reasonable static bearing capacity formular, the field measured values are compared with the calculated ones from the suggested various formular. In the case of side resistance in sand layer, the suggest formular in the Structural Foundation Design Manual by KGS was most reasonable, while in clay layer Railroad Design Manual.
Effect of Varying Water Content on the Mohr-Coulomb Shear Strength Parameters for Soils
Kim, Bum-Joo ; Kim, Khi-Woong ; Lee, Seung-Ho ; Hwang, Young-Cheol ; Park, Dong-Soon ;
Journal of the Korean Geoenvironmental Society , volume 9, issue 1, 2008, Pages 47~54
In this study, the effect of water content condition was investigated on the Mohr-Coulomb shear strength parameters which are commonly used as the input data in the soil slope analysis. For the purpose, a series of direct shear test was conducted in different water content conditions on the two types of weathered soils and a dam core material, obtained from the domestic slope construction sites and the dam construction site, respectively. The comparisons between the values of the Mohr-Coulomb
, estimated from the relationships between the normal stress and the peak shear stress for the samples in the four different water content conditions (i.e., dry side, optimum, wet side, and saturated), showed that overall, the values of
decreased gradually while those of
did not vary much with increasing the water content. A rough estimate for the varying ratio of the values of
indicated that the values of
decreased by every 25% of the
values in dry side, while those of
were constant, as the water content condition changed from dry, optimum, and wet to saturated, respectively.