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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.
비개착 추진공법에서 관의 형태에 따른 축소모형 융기 및 침하 실험분석
엄기영(Eum Ki-Young),최찬용(Choi Chan-Yong),천정연(Cheon Jeong-Yeon) 한국토목섬유학회 2010 한국지반신소재학회 논문집 Vol.9 No.4
국내 지하횡단공법 중 강관추진공법에서 구조물상부의 강관 roof 구조체 건설시 원형관 및 사각관이 가장 많이 사용되고 있다. 본 논문에서는 강관추진시 관형태에 따른 특징을 규명하고자, 관이 지반에 관입될 때 상부에 작용하는 마찰로 인한 지반의 거동특성을 축소모형실험을 실시하였다. 관입관의 형태에 따라 강관추진시 관의 주변 마찰저항력에 의한 지표변위를 파악하였으며, 융기 및 침하실험 결과 동일한 토피고에서 사각관이 원형관보다 관직경의 5~10%정도 융기 및 침하가 많이 일어났다. 그러나, 토피고에 의한 변위량의 차이가 관의 형태에 의한 변위량의 차이보다 크게 측정되었다. 굴착단계별 침하량과 융기량을 모사하기 위해 마찰조건과 지표변위를 일반화된 조건들에 바탕을 둔 변수로 실험을 수행하였고, 그 결과를 관입관의 형태에 따라 비교 분석하였다. In this study, a non-open cut method using a round or square pipe which has been commonly employed In Korea was experimentally evaluated and the behavioral features resulting from the friction while the pipe is penetrated into the ground was identified through the scale model test. To that end, a test device was fabricated by type of penetration pipe, by which the surface displacement caused by surrounding friction resistance was monitored. To simulate the settlement and heaving by excavation stage, the test was conducted based on generalized friction condition and surface displacement and the result therof was compared and analyzed, considering the type of penetration pipe.
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.