Go to the main menu
Skip to content
Go to bottom
REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
The Journal of Engineering Geology
Journal Basic Information
Journal DOI :
The Korea Society of Engineering Gelolgy
Editor in Chief :
Volume & Issues
Volume 18, Issue 4 - Dec 2008
Volume 18, Issue 3 - Sep 2008
Volume 18, Issue 2 - Jun 2008
Volume 18, Issue 1 - Mar 2008
Selecting the target year
The Analysis of the Correlation between Groundwater Level and the Moving Average of Precipitation in Kum River Watershed
Yang, Jeong-Seok ; Ahn, Tae-Yeon ;
The Journal of Engineering Geology, volume 18, issue 1, 2008, Pages 1~6
Precipitation and groundwater level data sets from Kum river watershed were analyzed and compared. The correlation between groundwater level and the moving average of precipitation was analyzed. Moving averaging technique is stochastic method and that was used to consider the effect of precipitation events on groundwater level fluctuation. Groundwater level generally follows seasonal precipitation pattern and low level occurs from early December to late April. Relatively high groundwater level is appeared in wet spell (July and August). The correlation between groundwater level and the moving average of precipitation to consider precedent precipitation events was analyzed with minimum two-year data sets. When the precipitation and groundwater level data set pair was selected the precipitation gauge station is closely located to groundwater level gauge station in the upstream direction to minimize the non-homogeneous precipitation distribution effect. The maximum correlation was occurred when the averaging periods were from 10 days to 150 days with Kum river watershed data. The correlation coefficients are influenced by data quality, missing data periods, or snow melt effect, etc. The maximum coefficient was 0.8886 for Kum river watershed data.
The Behaviour Characteristics of Reinforced Limestone Cavities by High Pressure Jet-Grouting
Hong, Won-Pyo ; Hong, Kun-Pyo ; Yea, Geu-Guwen ;
The Journal of Engineering Geology, volume 18, issue 1, 2008, Pages 7~16
Limestone area have mostly certain geological defects such as the internal cavities due to melting and fractured zone by external pressures. Especially, in case of constructing grand bridge, the treatment of the limestone cavities area having the geological defects is inevitable. In order to reduce foundation settlement and to reinforce the ground in the limestone cavities area, high pressure jet grouting has been carried out as a countermeasure method. Despite the fact that high pressure jet grouting method has already adopted at a lot of limestone cavities area, but the amount of research and technical data on the high pressure jet grouting have not been accumulated properly so for. Therefore this paper intends to investigate the strength characteristics and deformation characteristics for reinforced limestone cavities area by high pressure jet grouting method. In addition, load carrying capacity obtained by static pile load test with load transfer measuring system is analyzed.
Proposal of a Design Method of slope Reinforced by the Earth Retention System
Song, Young-Suk ; Hong, Won-Pyo ;
The Journal of Engineering Geology, volume 18, issue 1, 2008, Pages 17~26
In this study, the design method of slope reinforced by the earth retention systems were systematically developed, and the flow chart of design procedure fur each system were constructed to design the slope rationally. The proposed design method is composed of 5 steps such as field condition investigation step, slope design step, landslide occurrence prediction step, slope failure scale estimation step and reinforcement countermeasure selection step. The quantitative standard of slope failure scale was established based on the arrangement of various overseas standards which is estimating the slope failure, and the analysis of slope failure scale which is occurred in the country. The slope failure scale is classified into three categories the small scale of slope failure is less than
of slope failure volume, the middle scale of slope failure is from
and the large scale of slope failure is more than
. The earth retention system could be selected by the proposed slope failure scale based on the slope failure volume. Meanwhile, the design methods of earth retention system such as piles, soil nails and anchors were developed. The optimal countermeasure for slope stability could be proposed using above design methods.
Proposal for the Estimation Model of Coefficient of Permeability of Soil Layer using Linear Regression Analysis
Lee, Moon-Se ; Ryu, Je-Cheon ; Lim, Heui-Dae ; Park, Joo-Whan ; Kim, Kyeong-Su ;
The Journal of Engineering Geology, volume 18, issue 1, 2008, Pages 27~36
To derive easily the coefficient of permeability from several other soil properties, the estimation model of coefficient of permeability was proposed using linear regression analysis. The coefficient of permeability is one of the major factors to evaluate the soil characteristics. The study area is located in Kangwon-do Pyeongchang-gun Jinbu-Myeon. Soil samples of 45 spots were taken from the study area and various soil tests were carried out in laboratory. After selecting the soil factor influenced by the coefficient of permeability through the correlation analysis, the estimation model of coefficient of permeability was developed using the linear regression analysis between the selected soil factor and the coefficient of permeability from permeability test. Also, the estimation model of coefficient of permeability was compared with the results from permeability test and empirical equation, and the suitability of proposed model was proved. As the result of correlation analysis between various soil factors and the coefficient of permeability using SPSS(statistical package for the social sciences), the largest influence factor of coefficient of permeability were the effective grain size, porosity and dry unit weight. The coefficient of permeability calculated from the proposed model was similar to that resulted from permeability test. Therefore, the proposed model can be used in case of estimating the coefficient of permeability at the same soil condition like study area.
Study on Danger Cut Slopes Distribution Area based on Inventory Data in Chungcheongdo
Kim, Jin-Hwan ; Koo, Ho-Bon ; Rhee, Jong-Hyun ; Yoon, Chun-Joo ;
The Journal of Engineering Geology, volume 18, issue 1, 2008, Pages 37~44
KICT has been carrying out inventory research on the cut slopes of national roads. Inventory research results are basic data to cut slope management system. Inventory data are classified by general status, cut slope characteristics and inspector opinion. Inventory data are utilized to figure out dangerous slopes and decide survey ranking of detailed safety diagnostication. This paper drew the distribution area of dangerous cut slopes using inventory data in Chungcheongdo, and verified efficiency on distribution area of dangerous cut slopes by comparing occurrence frequency of real collapsed cut slopes.
Development to Prediction Technique of Slope Hazards in Gneiss Area using Decision Tree Model
Song, Young-Suk ; Chae, Byung-Gon ;
The Journal of Engineering Geology, volume 18, issue 1, 2008, Pages 45~54
Based on the data obtained from field investigation and soil testing to slope hazards occurrence section and non-occurrence section in gneiss area, a prediction technique was developed by the use of a decision tree model, which is one of the statistical analysis methods. The slope hazards data of Seoul and Kyonggi Province, which were induced by heavy rainfall in 1998, were 104 sections in gneiss area. The number of data applied in developing prediction model was 61 sections except a vacant value. Among these data, the number of data occurred slope hazards was 34 sections and the number of data non-occurred slope hazards was 27 sections. The statistical analyses using the decision tree model were applied to chi-square statistics, gini index and entrophy index. As the results of analyses, a slope angle, a degree of saturation and an elevation were selected as the classification standard. The prediction model of decision tree using entrophy index is most likely accurate. The classification standard of the selected prediction model is composed of the slope angle, the degree of saturation and the elevation from the first choice stage. The classification standard values of the slope angle, the degree of saturation and elevation are
, 52.1% and 320 m, respectively.
Hydraulic Characteristics of Shallow Geology in Dongrae Area, Busan Megacity
Ryu, Sang-Hun ; Hamm, Se-Yeong ; Jeong, Jae-Hyeong ; Han, Suk-Jong ; Cheong, Jae-Yeol ; Jang, Seong ; Kim, Hyoung-Su ;
The Journal of Engineering Geology, volume 18, issue 1, 2008, Pages 55~68
At present underground structures such as road tunnels, railway tunnels, underground petroleum storages and radioactive waste storages are being constructed in numerous places in Korea. For the construction of underground structrues, it should be accounted for natural factors (geology, hydrogeology, soil, vegetation, topography and drainage patterns) and human-social factors (land use, urbanization, population, culture and transportation). Especially, hydrogeology should be regarded as an important factor for evaluating the safety of underground structures and their impact to groundwater system around the structures. This study aimed to recognize hydrogeological characteristics of shallow formations in the area from Dongrae crossway to Seo-Dong where 45 boreholes were drilled for the construction of Line-3 subway in Busan Megacity. Slug tests for unsaturated and saturated zones were conducted on 30 boreholes in the study area. From the result of the slug tests, it was identified that average zonal hydraulic conductivity in the unsaturated zone was higher than that in the saturated zone. Besides, the slug test result in the saturated zones may reflect hydraulic properties of the upper most part of the saturated zones.
Development of Investigation and Analysis Technique to Landslides and Its Application
Kim, Kyeong-Su ; Song, Young-Suk ; Chae, Byung-Gon ; Cho, Yong-Chan ; Jeong, Gyo-Cheol ;
The Journal of Engineering Geology, volume 18, issue 1, 2008, Pages 69~81
Landslide researches are divided to a method of interrelationship for various factors, method of predicting landslide possibility, and method of estimating landslide risk which are occurring landslides in the natural slope. Most of landslides occurred in natural slope are caused by a heavy rainfall in summer season. Weathered soil layer located in upper side of rock mass was occurred. As well as, they are announced to have an influence to geometry, geology, soil characteristics, and precipitation in the natural slope. In order to investigate and interpret the variety of landslides from field investigation to risk analysis, landslide analysis process due to geotechnical and geological opinions are systematically demanded. In this research, the study area is located in Macheon area, Gyeongsangnam-do and performed the landslide investigation. From the results of landslide investigation and analysis, optimized standard model based on natural landslide is proposed to high technical method of landslide investigation and interpretation.
Study on Rainfall infiltration Characteristics for Weathered Soils: Analysis of Soil Volumetric Water Content and Its Application
Kim, Man-Il ; Chae, Byung-Gon ; Cho, Yong-Chan ; Seo, Yong-Seok ;
The Journal of Engineering Geology, volume 18, issue 1, 2008, Pages 83~92
In order to analyze infiltration characteristics of rainfall in soil, two laboratory experiments were conducted using an amplitude domain reflectometry (ADR) sensor and a pore water pressure meter (PWP) in this study. The first experiment is to understand the dependency of volumetric water content and temperature for standard sand and weathered granite soil. The second experiment is a laboratory flume test with changes of rainfall condition. As the results of the dependency experiment, the volumetric water content is increased with increase of the output voltage measured by the ADR sensor in both the standard sands and weathered granite soil. Furthermore, the results also indicate necessity of consideration of the temperature dependency under the condition of high volumetric water contents from 0.15 to 0.45. In the flume test, two measurement devices are detected to the variation of volumetric water content and pore water pressure at the installation point of the flume. In especial, the measured values of ADR4 and PWP3 installed on the lower part of slope are higher than those of the others. It means that the lower part of slope plays a role of a runoff face and a beginning point of slope failure.
Field Measurements for the Lattice Girder and the Shotcrete Lining
Kim, Hak-Joon ; Jin, Soo-Hwan ; Park, Si-Hyun ;
The Journal of Engineering Geology, volume 18, issue 1, 2008, Pages 93~102
The use of lattice girder is increased at the tunnel site in Korea because of the several advantages over the traditional H-steel rib. The lattice girder supports the ground with shotcretes, forming a combined support system. Therefore, stress measurements at the lattice girder are necessary to calculated the ground loads. However, field measurements at the lattice girder are rarely performed at the tunnel site. The proper way of stress measurements for the lattice girder is not fully established in Korea. The correction of stress measurements at the shotcretes is often disregarded even though the measured stresses include non-stress related strains. Results of the stress measurements obtained from the lattice girder and non-stress shotcretes are used to improve the credibility of the stress measurements at the primary lining.
Geochemical Aspects of Groundwater in Granite Area and the Origin of Fluoride with Emphasis on the Water-Rock Interaction
Choo, Chang-Oh ; Kim, Jong-Tae ; Chung, Il-Moon ; Kim, Nam-Won ; Jeong, Gyo-Cheol ;
The Journal of Engineering Geology, volume 18, issue 1, 2008, Pages 103~115
The purposes of this study are to understand characteristic water-rock interaction mechanisms of groundwater in the granite area of Geochang and Hapcheon areas, Gyeongnam-do and to clarify the origin of fluoride. The possible water-rock interaction process and the source of fluorine were studied using water chemistry, rock chemistry, mineralogy by XRD, and microtexture analysis by backscattered electron image of the electron microprobe. No clear relationships between F and hardness was found. But the fluorine content increases to some extent with pH and well depth. Preferential alteration due to water-rock interaction took place along edges or cleavage, or margins of biotite. Because biotite is highly subject to alteration in granite aquifer, fluorine in groundwater is originated from the leaching of biotite.