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NTIS 바로가기韓國地盤工學會論文集 = Journal of the Korean geotechnical society, v.30 no.4, 2014년, pp.21 - 34
한영철 (연세대학교 토목공학과) , 정상섬 (연세대학교 토목공학과)
This paper studies the time-dependent behaviors of tunnel and surrounding ground due to tunnel deterioration. In the first part, the literature on deterioration characteristics of tunnels was reviewed. In the second part, a numerical analysis was performed to investigate the behavior of concrete lin...
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핵심어 | 질문 | 논문에서 추출한 답변 |
---|---|---|
장기적으로 터널 운영과정 중에 발생하는 터널 복합 구조체의 열화 현상에 대한 원인은 무엇들로 대별되는가? | 장기적으로 터널 운영과정 중에 발생하는 터널 복합 구조체의 열화 현상에 대한 원인으로는 물리적(Physical processes), 화학적(chemical processes) 및 기타 요인(Other actions)으로 대별할 수 있다(Sandrone and Labiouse, 2010). | |
1980년 초 국내 도입된 NATM 터널은 무엇으로 구성되어 있는가? | 1980년 초 국내 도입된 NATM 터널은 주변 지반과 1차 지보공(shotcrete, rockbolt, steel rib, spiles 등) 및 2차라이닝(secondary lining)의 이중(double shell) 복합구조체로 구성되며, 2차(콘크리트) 라이닝은 지하수 차단과 1차 지보공 및 2차 라이닝의 분리를 목적으로 설치되는 방수막(waterproofing membrane)의 보호, 차량의 통행에 따른 시계 및 미관 확보 등의 목적으로 Final(concrete) lining, Permanent lining, Inner liner로도 불리우고 있다. 이러한 터널 구조물은 시간이 경과함에 따라 터널 복합 구조체에 각종 열화가 진행되고 노후화 되어 내구성의 저하가 발생하며 내구수명 및 사용연한을 감소시키는 결과를 초래하게 된다. | |
장기적으로 터널 운영과정 중에 발생하는 터널 복합 구조체의 열화 현상에 대한 원인중 물리적 요인은 어떠한 현상인가? | 물리적 요인은 ageing 혹은 creep효과와 같이 시간이 경과함에 따라 특성의 변화가 발생하는 현상이며 강성도의 저하 혹은 변형률 증가를 일으키며, 화학적 요인은 풍화(weathering)나 주변 환경(지하수, 대기오염 등)에 따른 화학적 변화로서 강도 및 역학적 특성을 감소시키며, 특히 shotcrete나 라이닝의 두께를 감소시킨다. 또한 기타 요인으로서는 동결, 화재 등이 있다. |
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