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정관동(Kwan-Dong Jung),엄기영(Ki-Young Eum),최찬용(Chan-Yong Choi),조수익(Su-Ik Jo),황인환(Hwan-In Hwang) 한국철도학회 2010 한국철도학회 학술발표대회논문집 Vol.2010 No.7
The method in a bid to make better use of limited urban space amidst increasingly expanding urban area have been attempted in various ways. Efficient using underground space is one of the examples. The pipe roof and excavation for underground crossing implemented in this study was the part of evaluation of such attempt. However, the pipe roof method for underground crossing may cause the ground surface to be uplifted or settled down, having effect on structure above the ground. Thus in this study, a laboratory model test designed to evaluate the effect on surface during implementing pipe roof and excavation was carried out. The ground displacement during pipe roof advancing and excavation is usually occurred in a radial shape but as the study focused on trackbed, the evaluation included ground settlement only. Thus, appropriately-scaled model was selected considering domestic geological characteristics and operation characteristics of traditional and high-speed rail trains and the qualitative evaluation of displacement was carried out with a certain ground loss depending on excavation after categorizing trackbed settlement pattern depending on depth of top soil.
장희정(Hee-Jung Jang),이종태(Jong-Tae Lee),엄기영(Ki-Young Eum),정관동(Kwan-Dong Jung),이성혁(Sung-Hyuk Lee),천정연(Jeong-Yeon Cheon) 한국철도학회 2010 한국철도학회 학술발표대회논문집 Vol.2010 No.7
The study on mechanical behavior of the structure at the site includes experimental method and numerical analysis method. Experimental method is categorized into true-scale test and laboratory model test. A laboratory model test is to monitor the failure mechanism with a model simulated similar with a real ground so as to identify the quantitative result, while a true-scale model test is the approach which enables to identify the potential problems that may occur with a simulated construction situation similar with a real site circumstance. Thus this study was intended to carry out the experimental test of non open-cut excavation by pipe roof method which is mostly common in domestic sites. as well as was aimed at identifying the ground behavior occurred during pipe penetration using laboratory model test. Appropriate reduced-scale model was selected, taking into account of domestic geological characteristics and operation characteristics of traditional and high-speed rail trains and the qualitative evaluation of displacement was carried out based on a certain ground loss volume depending on excavation after categorizing trackbed settlement pattern by depth of top soil.
엄기영(Eum Ki-Young),정관동(Jung Kwan-Dong),천정연(Cheon Jeong-Yeon),조수익(Jo Su-Ik),이종태(Lee Jong-Tae) 한국철도학회 2009 한국철도학회 학술발표대회논문집 Vol.2009 No.11월
The construction of underpass work is variously affecting on the rail roadbed and underground structure resulting in greatly influencing the safe operation of train. Owing to this many non-open type underpass methods passing under the railroad structure are being actually proposed. Accordingly the ground movement characteristics and rail roadbed affection shall be considered in planning, designing, and executing the underpass work in order to minimize the influence on the safety security for train operation and its surrounding. The analysis on the cause for ground movement is required in order to evaluate the influence of rail roadbed followed by the non-open type method, and the relationship with the soil amount removed underground and the upper and surrounding deformation distribution is required to be established. Accordingly, in this study the optimum miniature model is selected considering the national geological condition and the operational charateristics of high speed and general trains and the settlement and elevated pattern of the upper ground followed by the typical ground excavation type is attempted to be evaluated.