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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of The Korean Society of Civil Engineers
Journal Basic Information
Journal DOI :
Korean Society of Civil Engeneers
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Volume & Issues
Volume 17, Issue 3_6 - Nov 1997
Volume 17, Issue 2_6 - Nov 1997
Volume 17, Issue 1_6 - Nov 1997
Volume 17, Issue 3_5 - Sep 1997
Volume 17, Issue 2_5 - Sep 1997
Volume 17, Issue 1_5 - Sep 1997
Volume 17, Issue 3_4 - Jul 1997
Volume 17, Issue 2_4 - Jul 1997
Volume 17, Issue 1_4 - Jul 1997
Volume 17, Issue 3_3 - May 1997
Volume 17, Issue 2_3 - May 1997
Volume 17, Issue 1_3 - May 1997
Volume 17, Issue 3_2 - Mar 1997
Volume 17, Issue 2_2 - Mar 1997
Volume 17, Issue 1_2 - Mar 1997
Volume 17, Issue 3_1 - Jan 1997
Volume 17, Issue 2_1 - Jan 1997
Volume 17, Issue 1_1 - Jan 1997
Selecting the target year
A Study on the Development of the Travel Mode Choice Model and the Temporal Transferability for Non-workers
Kim, Dae-Oung ; Bae, Young-Suk ; Kim, Eon-Dong ; Kwon, Yong-Woon ;
Journal of The Korean Society of Civil Engineers, volume 17, issue 3_1, 1997, Pages 1~1
The main purpose of this study is the development of the logit models of urban non-workers' travel mode choice and the temporal transferability. The data were collected using the person trip data in Taegu (1988. 1992). The empirical estimation of the mode choice model for non-workers provides reasonable result in terms of behavioral and statistical consideration. As the results of the temporal transferability. it is found that we can transfer the model from 1988 to 1992 but some measures of transferability are not quite satisfactory statistical consideration.
The Effect of Road Image on the Drivers' Route Choice
NamGung, Moon ; Sung, Soo-Lyeon ;
Journal of The Korean Society of Civil Engineers, volume 17, issue 3_1, 1997, Pages 13~13
Travel time, average delay and driving experience are important factors in characterizing a drivers' behavior. In addition to these factors above, the road image felt by the driver can be said to be another important factor internally latent in the driver himself. This study examines the characteristics of selected roads by analyzing road images perceived by the drivers themselves, and analyzes the influence of these images on the route choices by drivers. The results of the road image assessment and the factor analysis of individual drivers show that the structure and facilities of roads are significant factors in route choice on urban streets, and that the road image of driving itself works as crucial factor in route choice on non-urban streets. This study further shows that the road image changes depending on the frequency of driving. Finally. route choosing behavior as modeled by multidimensional quantification, shows that drivers with less road experience feel a stronger road image and are significantly influenced by it in their route choice, while the road image becomes weaker to the drivers with more road experience, and its effect in their route choice becomes weakened.
Experiment of Accelerated Pavement Testing by Texas Mobile Load Simulator (MLS)
Cho, Yoon-Ho ;
Journal of The Korean Society of Civil Engineers, volume 17, issue 3_1, 1997, Pages 23~23
Tx-DOT developed Mobile Load Simulator (Tx-MLS) to observe interaction between pavement performance and heavy traffic loads. This paper deals with brief description of the machine and then covers pavement performance from the test section placed near Victoria in Texas. Nondestructive testings such as multidepth deflectometer (MDD). spectral analysis of surface wave (SASW) and falling weight deflectometer (FWD) were performed to infer structural status of pavement inside under the moving loads. Rut depth and profile of pavement were recorded by the profilometr specially designed for the purpose of this project. Detail condition survey was also followed after fixed interval of loading application. All these observations make an engineer satisfy translating empirical performance results into mechanistic ones and validation of MLS itself. In addition, the testing pavement failed so early that it could explain a requirment to develop new way defining traffic effect on the pavement.
A Study on the Digital Thematic Mapping Procedures by Map Scanning Method
Lee, Kee-Boo ; Youn, Kyung-Chul ; Shin, Sang-Cheal ;
Journal of The Korean Society of Civil Engineers, volume 17, issue 3_1, 1997, Pages 37~37
For holding the geo-spatial information which will be achieved in various fields in common, the unification of the guidelines for making a digital thmatic mapping is necessary. But these is no standard guidelines yet. In this study, we examine the process of making the 1/5,000 digital topographic map as a work of NGIS, and also try to find the problems which occurs in making a arbitary scale thematic mapping.
Precise Positioning Using Least Squares Ambiguity Search Technique
Kim, Yong-Il ; Kim, Dong-Hyun ;
Journal of The Korean Society of Civil Engineers, volume 17, issue 3_1, 1997, Pages 47~47
LSAST (Least Squares Ambiguity Search Technique) algorithm which is a integer ambiguity search technique while on the move, so called real-time OTF (on-the-fly), is programmed in order to be applied to double difference observations of carrier phases. Two controlled experiments, one is static surveying and the other is real-time OTF. are executed so as to validate the algorithm programmed. Only single epoch is sufficient to fix true integer ambiguity and to calculate positions with the same accuracy and precision comparing with traditional static surveying using GPS carrier phases. Another experiment to check the performance and stability of LSAST algorithm is runned and a new cycle-slip detection and repair algorithm in the moving environments is proposed in this paper.
A study on the Orthometric Height Correction in Mt. Jiri Area
Choi, Kwang-Sun ; Kim, Jeong-Hee ; Yang, Chul-Soo ;
Journal of The Korean Society of Civil Engineers, volume 17, issue 3_1, 1997, Pages 63~63
Gravity surveys with accompanying spirit levelings were carried out in Mt. Jiri area. From these survey results, orthometric height corrections were calculated. The correction reaches 13 cm when the height difference is 1,400 m. The corrections were also calculated using an available Bouguer anomaly map. and they are little different from the previous results. In conclusion, orthometric height corrections are necessary in precise spirit leveling. specially in higher lands, and they can be easily calculated from an available Bouguer anomaly map without laborious gravity surveys.
GPS-Aided Combined Bundle Block Adjustment for the Large Area
Lee, Jong-Chool ; Lee, Jae-One ; Shin, Sang-Cheal ;
Journal of The Korean Society of Civil Engineers, volume 17, issue 3_1, 1997, Pages 71~71
Nowadays, GPS-aided aerial triangulation becomes a standard technique for topographic mapping. The main reason for wide spreading of combined bundle adjustment with GPS is the cost savings through considerably reduction of ground control points without loss of accuracy in comparison with conventional method. Another advantage of GPS-Photogrammetry is the real time flight navigation which enables to conduct the preplanned overlap and exposure time exactly. But, GPS-data processing is very complicated and it needs a lot of experiences for such a combined block adjustment. Many problems, such as. ambiguity. cycle slips, antenna-offset, time synchronization and systematic errors caused by the kinematic GPS positioning are to be eliminated. This Paper presents results and problems of an experimental photogrammetric flight "Rheinkamp" from 1989, which was conducted by Institute for Photogrammetry at the University of Hannover.
The Geocoding of ERS-1 Ground Range Synthetic Aperture Radar Imagery Using Ephemeris Information Obtained from Header File
Sohn, Hong-Gyoo ; Jeong, Soo ; Yeu, Bock-Mo ;
Journal of The Korean Society of Civil Engineers, volume 17, issue 3_1, 1997, Pages 81~81
SAR (synthetic aperture radar) is a widely-used technique to generate radar images in which fine detail can be resolved. SAR provides unique capabilities as an imaging tool, by generating its own illumination (radar pulses). Prior to any quantitative manipulation, enhancement and analysis. the raw image data should be geometrically corrected. After which it is possible to integrate the geocoded image data into GIS (geographic information system), CAD (computer assisted design). or map-based spatial databases. The geocoding scheme of ERS-1 ground range SAR imagery is implemented and analyzed using ephemeris information obtained from the header file. The geocoding scheme is applicable for inaccessible regions where ground control points ire not available. The results show that this scheme is within an acceptable error range, considering no ground control points are used.
Analysis of Shield Tunnel's Behavior due to Variation of Bulkhead Earth Pressure
Jin, Chi-Sub ; Han, Sang-Jung ; Lee, Hong-Ju ;
Journal of The Korean Society of Civil Engineers, volume 17, issue 3_1, 1997, Pages 91~91
The use of shield is increasing day by day, because it is advantageous tunneling method to soft and collapsible ground. In case of analyzing shield tunnel by FEM, short term behavior of ground due to initial heaving and tail void closure and long terms due to consolidation by changes of pore pressures in clay must be considered. In this paper 2 dimensional elasto viscoplastic finite element program was made using Mohr-Coulomb yield criterion for the shield tunneling construction stages, but not considered the changes of pore pressures. The object of analysis was N-2 Tunnel. the analytical values were compared with the measured values that the bulkhead earth pressure is different in 2 instrumentation lines. Since the results of analysis are similar to the measured behavior of ground for heaving, tail void closure and liner installation, therefore the control of construction for the ground behavior can be made by the control of heaving due to variation of bulkhead earth pressure. The greater it's pressure. the greater effects by vertical and lateral displacements, and so it is known that the effects of lateral displacement must be considered when the tunnel is constructed to near underground structures.
Reliability of Pile Capacity Prediction by Cone Penetration Test
Yoon, Gil-Lim ;
Journal of The Korean Society of Civil Engineers, volume 17, issue 3_1, 1997, Pages 101~101
This paper addresses a reliability of driven pile capacity prediction methods by Cone Penetration Test (CPT) data by comparing its results with full-scale loading test results. Eleven identical driven pipe piles were tested to failure axially, and twenty-eight cone ponetrometer soundings were performed in close proximity to the piles at the overconsolidated clay site. Geostatistical analysis were used to estimate spatial variability of cone penetration test data at the site. CPT-based design models, including Schmertmann's method. Tumay and Fakhroo's method. and the LPC method, have been used to predict the ultimate capacity of eleven identical driven steel pipe piles. There were in good agreements between the predicted values by three CPT methods and the measured values by load test, which suggests that these CPT-based methods with geostatistical analysis of CPT data gives consistent values which can be used to estimate only prediction errors in computation of driven pile capacity at the overconsolidated site.
The Experimental Study on The Electro Osmotic Consolidation of Soft Clayey Soil
Kim, Soo-Sam ; Lee, Kwang-Yeol ; Han, Sang-Jae ; Ko, Kyeng-Hwan ;
Journal of The Korean Society of Civil Engineers, volume 17, issue 3_1, 1997, Pages 111~111
Recently. a number of large-scale site construction for the various purposes by dredging and reclamation and building the foundation ground of the site by ground improvement techniques are in progress in the seaside area of Korea. As a part of supplementary ground improvement method, this research is focused on the fundamental study for the utilization of electro-osmosis. In this study, in order to verify the efficiency of consolidation and drainage by electro-osmosis, conventional theories related to electro-osmosis were primarily investigated to select and derive the governing equation for the electro-osmotic behavior of soil. In this study. electro-osmotic consolidation tests were carried out. The effect of electrolyte such as sodium chloride in soils was comparatively studied and also the effect of voltage gradients was investigated. Consequently. those test results were compared with the well-known conventional theories. Based on the experimental results presented so far, following conclusions can be obtained. With the increase of voltage gradient rate of consolidation increases. And this behavior is largely affected by the concentration of sodium chloride contained in soils. The electro-osmotic consolidation. characteristics of this study shows good agreement with Esrig's theory. Finally, it is found that initial porewater pressure profile can be assumed to be varied linearly with depth.
The Analysis of Softening Behavior of Soil Using the Spline Function
Hwang, Koou-Ho ; Kim, Soo-Sam ; Koh, Kyung-Hwan ; Lee, Song ;
Journal of The Korean Society of Civil Engineers, volume 17, issue 3_1, 1997, Pages 121~121
Duncan's hyperbolic model is the one of the most wide-spread used model. This model provides a simple governing equation encompassing the most important characteristics of soil stress-strain behavior, using the data obtained from conventional triaxial compression laboratory tests. The values of the hyperbolic parameters can be obtained easily from soil. But, this model is inappropriate to express the plastic behavior of soil. A new model to explain the softening behavior of overconsolidated soil is suggested using the spline functions with the values of OCR.
One-Dimensional Consolidation Behavior of the Clay by the Triaxial Compression Consolidometer
Jo, Sung-Min ;
Journal of The Korean Society of Civil Engineers, volume 17, issue 3_1, 1997, Pages 127~127
This paper analyzes the one-dimensional consolidation behavior through the loading, unloading and reloading using the triaxial compression consolidometer. It is hard to get the precise stress path and the consolidation behavior of the each part of the specimen by odeometer test, triaxial compression consolidometer test because of the effect of side friction and unsaturation. But. the specimen is saturated by the increase of the back pressure during the unloading using the odeometer test and the triaxial compression consolidometer. Using this specimen, the test of normal consolidation and overconsolidation is analyzed. The results strongly support the principle of effective stress. Under the normal consolidation, the index of compression (
) is constant regardless of the loading stages. but the 24-hour recompression curve (
) is nonlinear under the overconsolidation. Therefore, the constitutive equation under the normal consolidation can not be applied to that under the overconsolidation.
One-dimensional Consolidation Behavior of the Clay Under the Overconsolidation
Jo, Sung-Min ;
Journal of The Korean Society of Civil Engineers, volume 17, issue 3_1, 1997, Pages 135~135
The study of the consolidation character of clay studies can be explained by Terzaghi's consolidation theory, the effective stress theory studied by Gibson and Mikasa. Berre and Mesri shows the constitutive equation without considering creep phenomenon occured during the primary consolidation of the inter-connected consolidometer. These researches could not explain the secondary consolidation and overconsolidation behavior adequately because of the unskilled maufacturing techniques of the apparatus. This paper analyzes the one-dimensional consolidation behavior through the loading. unloading and reloading using the new inter-connected consolidometer. Also, this study supports the Isotache phenomenon under both consolidation conditions. By the Hawely's numerical analysis of stress path, the relationship between normal effective stress and void ratio is linear after the yield of consolidation, but the results of this research shows that this is nonlinear.