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터널의 유지관리를 위한 전문가시스템 개발 : 시스템 구축 및 적용성 검토
김문겸 ( Kim Moonkyum ),임윤묵 ( Lim Yunmook ),허택녕 ( Huh Taiknyung ),김도훈 ( Kim Dohoun ) 한국구조물진단유지관리공학회 2000 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.4 No.1
A tunnel maintenance is often neglected since tunnels have tendency to become stable with time, and the determination of tunnels safety is not a complicated problem. So the role of experienced engineer in the tunnel maintenance is very important and development of an expert system which can perform as these engineers has been needed. In this study, an expert system which can determine the tunnels safety is developed. The developed knowledge base contains the maintenance procedure which is used in KISTEC(Korea Infrastructure Safety & Technology Corporation). Field test, laboratory test and nondestructive test methods are considered in this knowledge base. Criterion for each item and integrated diagnosis criteria are implemented in the expert system based on literatures and reports. The expert system includes basic inspection, detail inspection and precision inspection. To verify the expert system, the proposed procedure was compared with an existing tunnel diagnosis report.
언더피닝 공법을 이용한 구조물 침하에 대한 시공 단계 해석
이종협(Lee Jonghyop),허승진(Heo Seungjin),옥수열(Ok Suyeol),임윤묵(Lim Yunmook) 대한토목학회 2012 대한토목학회논문집 A Vol.32 No.3A
본 연구에서는 건설공사에 적용된 언더피닝공법의 수치해석 결과와 시공 중 완료후의 계측 값을 비교하여 불확실성을 줄일 수 있는 해석모델링 방안을 제시하고자 한다. 수치해석을 이용하여 구조물의 거동을 정확하게 예측하기 위해서는 다양한 조건을 복합적으로 고려해야 하며, 복합적으로 고려하였다 하더라도 예측된 결과에는 상당한 불확실성이 내포되어 있으므로 실제 공사에서는 계측을 통한 안정성 확보가 필요하다. 본 연구에서는 굴착 인접 구조물인 지하차도의 침하량뿐만 아니라 본 구조물인 강관에서도 많은 침하량이 발생하는 것을 수치해석을 통해서 분석하였다. 지하차도 침하량의 현장계측 결과를 통해서 지하차도가 매단 굴착 시 단계적으로 침하가 발생하며 대칭 굴착으로 진행된 단계보다 비대칭 굴착으로 진행된 단계에서 침하량이 더 크게 발생하는 경향이 나타났다. 수치해석 시 주요 고려사항으로는 현장의 시공순서, 기존 시설물의 방향성, 요소의 모델링 방법, 물성치의 적용이며, 이들 값에 따라 수치해석 결과 값에 영향을 미칠 수 있음을 확인하였다. This paper aims to present accurately analytical modeling method for underpinning using uncertainty reduction, obtained from comparison between numerical analysis and Site measuring data during construction and service stages. Combination of various conditions should be considered for using numerical analysis to predict the behavior of the structure accurately, even though complexly considered the conditions, real construction should be secured the stability by applying the actual instrument measurement data because predicted results are including the considerable uncertainty. In order to secure the stability during construction, the real time instrument measurements together with numerical analysis results performed before construction state are complementary used actively. From the results of this study, the significant settlements are occurred not only in underpass structure of adjacent excavation area but also in the permanent steel pipe structures were analyzed. From the site measurement results of underpass settlement, the settlements are occurred in every stages of excavation, furthermore observed tendency is asymmetrical excavation patterns are settled more than symmetrical excavation patterns. The essential consideration points for numerical analysis are construction sequence, the direction of the existing facilities, the methods of elements modeling, the applied factors for nature of material and different results would be occurred depending upon inputting the above factors.