- 권한신청
- P-ISSN2233-8292
- E-ISSN2287-4747
- KCI
ISSN : 2233-8292
개착식 터널 프리캐스트 아치 구조물의 변형거동 연구
Investigation for the deformation behavior of the precast arch structure in the open-cut tunnel
이규필 (한국건설기술연구원)
임철원 (후레씨네코리아)
- 다운로드 수
- 조회수
Abstract
The behavior of the 3 hinged precast arch structure was investigated by comparing field measurements with numerical analyses performed for precast lining arch structures, which are widely used for the open-cut tunnel. According to the field measurements, the maximum vertical displacement occurred at the crown with upward displacements during the backfilling up to the crown of the arch and downward displacements at the backfill height above the crown. The final crown displacement was 19 mm upward from the original position. The horizontal displacement at the sidewall, which had a maximum horizontal displacement, occurred inward of the arch when compacting the backfill up to the crown and returned to the original position after completing the backfill construction. According to the analysis of displacement measurements, economical design is expected to be possible for precast arch structures compared to rigid concrete structures due to ground-structure interactions. Duncan model gave good results for the estimation of displacements and deformed shape of the tunnel according to the numerical analyses comparing with field measurements. The earth pressure coefficients calculated from the numerical analyses were 0.4 and 0.7 for the left and the right side of the tunnel respectively, which are agreed well with the eccentric load acting on the tunnel due to topographical condition and actual field measurements.
- keywords
- Open-cut tunnel, Precast lining, 3 hinged, Precast arch structure, Duncan model, 개착식 터널, 프리캐스트 라이닝, 3힌지, 프리캐스트 아치 구조물, Duncan 모델
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