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세그먼트 시공오차에 따른 이음부 지수재별 방수성능 평가
허승무,정훈,이석원 사단법인 한국터널지하공간학회 2018 한국터널지하공간학회논문집 Vol.20 No.6
The interest in the use of shield TBM (Tunnel Boring Machine) on the tunnel excavation has been increased rapidly in Korea. The shield TBM tunnel is generally designed as non-drainage tunnel. Consequently, if water leakage through the segment joints happens, big problems on the usage and stability of tunnel can be occurred. In this study, the variation of waterproof capacity of hydrophilic rubber waterstop and gasket, respectively by the construction error and excessive displacement of segment was studied. The test results show that hydrophilic rubber waterstop has favorable on the offset, however unfavorable on the gap. On the other hand, gasket has unfavorable on the offset, however favorable on the gap. 최근 국내에서는 쉴드 TBM (Tunnel Boring Machine)을 이용한 터널 굴착에 대한 관심이 크게 증가하고 있다. 쉴드 TBM 터널은 비배수 터널로써 세그먼트 이음부에서 누수가발생할 경우에는 터널의 사용성 및 안정성에 문제가 될 수 있다. 본 연구에서는 쉴드 TBM 터널의 세그먼트 시공 시 시공오차 및 세그먼트 과다변형에 의한 수팽창 지수재 및 가스켓각각의 방수 성능을 검토하였다. 실험결과, 수팽창 지수재는 엇갈림에 대해서는 대응성이좋으나, 틈새 간격에 대해서는 대응성이 불리한 것으로 나타났다. 반면에 가스켓은 틈새간격에 대해서는 대응성이 좋으나, 엇갈림에 대해서는 대응성이 불리한 것으로 나타났다.
Effectiveness of One-Sided Gasket Waterproofing System
허승무,이석원 대한토목학회 2022 KSCE JOURNAL OF CIVIL ENGINEERING Vol.26 No.12
The application of shield Tunnel Boring Machine (TBM) is steadily increasing in downtown areas. Since segments are used in shield TBM, gaskets are mostly required for the waterproofingsystem. Each of the two facing segments has a gasket attached to it, and the two gaskets are pressed tightly together. However, construction errors such as offsets and gaps may cause water leakage during the segment assembly process. In this study, a new waterproofing system was developed that ensures higher waterproofing performance while essentially eliminating the offset effect by putting a gasket on only one side rather than both sides. To investigate the effectiveness of the new system, waterproofing performance tests were conducted, and the results of the existing system were compared with those of the new system. The results of the existing system showed that, when the offset exceeded 5 mm, the gaskets rapidly became vulnerable to leakage regardless of the gap. However, the new system showed that adequate waterproofing performance could be acquired when the height of the gasket was secured above a certain level. Finally, it was found that the new system proposed in this study was relatively superior to the existing system.
허승무(Seung Moo Heo),권영국(Young Guk Kwon) 대한인간공학회 2018 대한인간공학회 학술대회논문집 Vol.2018 No.11
Objective: The aim of this study is to make practical application in the field through the procedural and methodological suggestion. Background: As a result of several risk factor investigation of musculoskeletal burdens, efforts have been made to supplement the system. There are some areas that have not been improved, and many researchers have raised problems and improvement directions. But worker’s interest has been lowered as a number of investigation have been repeatedly surveyed. This is because the investigation is not practical aid and it is a formal process. Method: This study summarizes the procedural and methodological aspects of the problems that have been raised in the past and suggests ways to improvement compared with the current situation. As needed we have tried to application by bringing up empirical methodology. Conclusion: The Participatory system has been strengthened recently, procedure and methodology for each step were presented. Application: The results of this study will be helpful as a practical guide to investigate musculoskeletal burdens which are realistic help regardless of industry.
허승무(Seung-Mu Heo),장재건(Jae-Khun Chang) 한국멀티미디어학회 2006 한국멀티미디어학회 학술발표논문집 Vol.2006 No.2
최근 인식 분야에서 많은 관심을 간고 있는 SVM(Support Vector Machines)은 여러 분야에서 자주 응용되고 있다. 본 논문에서는 현대의 복잡한 교통 상황에서 차량의 정보를 알 수 있는 가장 중요한 요소인 차량 번호판을 인식하는데 있어서 SVM을 이용한 번호판 위치를 찾는 새로운 방법을 제안한다. 제안한 기술은 입력된 영상에서 정확하게 차량 번호판 부분만을 찾아내며, 실험을 통하여 제안한 기법에 대한 결과를 알아본다.