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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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The Journal of Engineering Geology
Journal Basic Information
Journal DOI :
The Korea Society of Engineering Gelolgy
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Volume & Issues
Volume 15, Issue 4 - Dec 2005
Volume 15, Issue 3 - Sep 2005
Volume 15, Issue 2 - Jun 2005
Volume 15, Issue 1 - Mar 2005
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Assessment of River Water Quality Contaminated by Abandoned Mine and Hot-Spring using Principal Component Analysis
Lee Jae-Young ; Sato Yuko ; Kang Meea ; Jeong Gyo-Cheol ;
The Journal of Engineering Geology, volume 15, issue 4, 2005, Pages 381~390
S City depends on the T River as source water for water supply. Arsenic and boron from the hot-spring waste-water discharged from the hot-spring spa resort and emerging from the fractures of bedrock of the river have been prevalent contaminant of the T River water. This research was conducted to propose the simple and quick surrogate parameter for water quality management easily. And through making hexa-diagram of principal ions in the water samples, existing state of the water and influence of the human activity or geological origin can be figured out. As a results of characteristics of the T River water quality using principal component analysis, the contributory percentages of the 1st, 2nd and 3rd principal components were
, respectively. Therefore it was clarified that the quality of the T River water could be explained by these three principal components. Concentration of the chloride ion, which is one of the characteristics of the hot-spring water, was well correlated to both arsenic and boron concentrations. Hence concentrations of the arsenic and boron in the raw water of the water reatment plant can be predicted by the measurement of concentration of the chloride ion.
Hydrogeochemical Characteristics of Groundwater on Well Depth Variation in the Heunghae Area, Korea
Yun Uk ; Cho Byong-Wook ;
The Journal of Engineering Geology, volume 15, issue 4, 2005, Pages 391~405
Chemical and isotopic analysis for stream water, shallow groundwater, intermediate groundwater and deep groundwater was carried out to grasp hydrogeochemical characteristics of groundwater in the Heunghae area, Pohang city. Water type of stream water and shallow groundwaters is typified as Ca-Cl type, intermediate groundwater is
, and deep groundwater is prominent in Wa-Cl type.
in shallow groundwater are originated from weathering of silicate minerals, whereas those of deep groundwaters are resulted from weathering of carbonate minerals. Ca and Mg ions in both shallow and deep groundwaters are resulted from weathering of calcite and dolomite.
in shallow groundwater is originated mainly from pyrite oxidation. As well depth increases, pH and TDS increase, but Eh and DO decrease. Alkali metal contents(K, Na, Li) increases as well depth increases, but alkali earth metal(Mg, Ca) and hi concentrations increase as well depth decreases. Anions, halogen elements(F, Cl, Br), and
contents increase as well depth increases. The average stable isotope value of the groundwater of each depth is as follows; deep groundwater:
, intermediate groundwater:
, shallow groungwater :
, surface water :
Hydrogeological Properties of Uunconsolidated Formations and Bedrocks in the Central Area of Busan Metropolitan City
Hamm Se-Yeong ; Cha Yong-Hoon ; Cheong Jae-Yeol ;
The Journal of Engineering Geology, volume 15, issue 4, 2005, Pages 407~421
This study aims to investigate hydrogeological properties of the central area from Yangjeong-Dong to Sujeong-Dong in Busan Metropolitan City. For this study, pumping tests were carried out in the bedrock aquifer of Yangjeong-Dong and the unconsolidated aquifer near Busanjin railway station. The pumping test in the bedrock aquifer containing the Dongrae fault revealed specific hydraulic characteristics with respect to the fault. The pumping test in the unconsolidated aquifer revealed the hydrogeologic properties of both coastal landfill and fine sediments. It was found that the Moench's sphere-shaped dual-porosity model fits the bedrock aquifer, whereas the Neuman's uncofined aquifer model accords with the unconsolidated aquifer. The average transmissivity and storage coefficient of the bedrock aquifer are
and those of the unconsolidated aquifer are
, respectively. On the other hand, slug tests gave average transmissivity and storage coefficient values of
Stability Evaluation of Shallow Foundation by Plate Bearing Test
Ki Wan-Seo ; Joo Seung-Wan ; Kim Sun-Hak ;
The Journal of Engineering Geology, volume 15, issue 4, 2005, Pages 423~433
For the design of spread foundation and the stability evaluation, we compared and analyzed it for theoretical, empirical bearing capacity formulas, and various settlement computation formulas, by conducting the plate bearing test at the site of A and B, which consisted of gneiss weathered soil. In addition, we considered the effective method of stability evaluation by carrying out the plate bearing test carried out on the ground consisted of weathering soil of gneiss. Consequently, it was found out that the allowablebearing capacity by the theoretical formula of Terzaghi was too excessive in comparison with the result of the plate bearing test and the Terzaghi-Peck method, which was used widely domestically in designing the spread foundation. It was more effective for a stable design. As a result of the plate bearing test carried out, on the ground consisted of weathering soil. It was found that reviewing the stability by the bearing capacity calculated with load-settlement curve. It is evaluated in a safer side than the point of view of the settlement.
Landslide Characteristics induced by Heavy Rainfall in Samcheok Area
Song Young-Suk ; Jang Yoon-Ho ; Kim Jin-Seok ;
The Journal of Engineering Geology, volume 15, issue 4, 2005, Pages 435~445
Landslides induced by heavy rainfall from typhoon 'Rusa' in 2002 and typhoon 'Meami' in 2003 were investigated at Samcheok area, and the relationship between landslides and rainfall on that area was analyzed. The average annual rainfall at Samcheok area is generally
. However, the average annual rainfall at samcheok for 2003 and ton was increased more than 2,000mm because of typhoon 'Rusa' and typhoon 'Meami'. The number of landslides and the landslides area are largely occurred in a area of the relatively high maximum hourly rainfall and 2days cumulative rainfall. Therefore, it confirmed that landslides are directly depended on the hourly rainfall and the cumulative rainfall. The landslides at Samcheok area induced by heavy rainfall due to typhoon are more influenced by the maximum hourly rainfall at the landslide occurrence day. In order to predict a rational landslide size, a new method included the maximum hourly rainfall and the landslide area in a traditional way was proposed. As the result of applying the new proposed method, the landslide size at Samcheok area is involved in the large scale landslide.
Importance of Microtextural and Geochemical Characterizations of Soils on Landslide Sites
Kim Kyeong-Su ; Choo Chang-Oh ; Booh Seong-An ; Jeong Gyo-Cheol ;
The Journal of Engineering Geology, volume 15, issue 4, 2005, Pages 447~462
The purposes of this study are to evaluate and discuss the importance of geochemical properties of soil materials that play an important role in the occurrence of the landslide, using analyses of microtexture, particle size distribution, XRC, and FE-SEM equipped with energy dispersive spectrum on soils collected from landslide slopes of gneiss, granite and sedimentary rock areas. Soils from gneiss and granite areas where landslides took place have much clay content relative to those from non landslide areas, particularly pronounced in the granite area. Therefore the clay content is considered a sensitive factor on landslide. Clay minerals contained in soils are illite, chlorite, kaolinite and montmorillonite. Especially the content of clay minerals in soils from the Tertiary sedimentary rocks is highest, with abundant montmorillonite as expandable species. It is believed that this area was much vulnerable to landslide comparable to other areas because of its high content of monoorillonite, even though there might be weak precipitation. Since no conspicuous differentiation in mineralogy between the landslide area and non landslide area can be made, the occurrence of landslide may be influenced not by mineralogy, but by local geography and mechanical properties of soils. Geochemical information on weathering properties, mineralogy, and microtexture of soils is helpful to better understand the causes and patterns of landslide, together with engineering geological analyses.
Quantification Method of Tunnel Face Classification Using Canonical Correlation Analysis
Seo Yong-Seok ; Kim Chang-Yong ; Kim Kwang-Yeom ; Lee Hyun-Woo ;
The Journal of Engineering Geology, volume 15, issue 4, 2005, Pages 463~473
Because of using the same rating ranges for every rock types the RMR or the Q-system could not usually consider local geological characteristics They also could not present sufficiently the engineering anisotropy of rocks. The canonical correlation analysis was carried out with 3 kinds of face mapping data obtained from granite, sedimentary rock and phyllite in order to clarify a discrepancy between rock types. According to analysis results, as a type of rocks changes, RM factors have different influences on the total rating of RMR.
Geological Structural Lines and Hamdeok-Pyoseon Graben in Jeju Island
Booh Seong-An ; Jeong Gyo-Cheol ; Kim Hye-Bin ; Kim Kyeong-Su ; Woo Myoung-Ha ; Lee Byoung-Ho ;
The Journal of Engineering Geology, volume 15, issue 4, 2005, Pages 475~486
According to the inference results of formation process of the tectonic lineament, totally four events of subsidence including two events after upheaval of granite body and two events after sedimentation of unconsolidated sedimentary layer formed the macroscopic tensional lineament. The subsidence was occurred by tensional stress oriented ENE-WSW direction and compressional stress oriented NNW-SSE direction. The deeper distribution of tuff and unconsolidated sedimentary layer as much as 70-140m and that of granite as much as 50-500m at Hamdeok and Shinheung than those of the eastern and the western area around Hamdeok and Shinheong is due to the Hamdeok-Pyoseon Graben by three events of differential subsidence from Hamdeok to Pyoseon including Shinheung.
A Laboratory Test for Detecting the Infiltrating Characteristics of Unsaturated Soil in Soil Slide
Kim Man-Il ; Chae Byung-Gon ; Jeong Gyo-Cheol ;
The Journal of Engineering Geology, volume 15, issue 4, 2005, Pages 487~494
In order to estimated a reason of soil slope failure new measurement technology is demanded to measure a variation of volumetric water content which is a key physical parameter for understanding the slope failure in the field. In this study a laboratory soil tank test were conducted to use RDB and ADR measurement probes for measuring the variation of volumetric water content. These experiments were compared with two physical parameters as volumetric water content and pressure water head which are estimated to the compacted weathered granite soil under the artificial rainfall, 7.5mm/hour, in the whole of two stages. From the results the variation of volumetric water content and pressure water head is represented to nearly similar travel time.