한국구조물진단유지관리공학회 논문집 (Journal of the Korea institute for structural maintenance and inspection)
- 제5권3호
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- Pages.225-231
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- 2001
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- 2234-6937(pISSN)
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- 2287-6979(eISSN)
한강 단층대를 통과하는 하저터널의 안정성 확보에 관한 연구
Stability Evaluation for a riverbed tunnel in the Han River at the Fault Zone Crossing
- 투고 : 2001.06.08
- 발행 : 2001.07.31
초록
When building tunnels beneath riverbeds where very large quantities of groundwater inflow exist, added to high water head the soil supporting conditions are very poor because the soil consists of sand and silt, etc. It is necessary to have grouting and mini pipe roof installed in the region for ground reinforcement to decrease permeability. According to this result of horizontal boring and laboratory soil testing, ground reinforcement was achieved by L.W grouting for range of 3.0 times the tunnel radius, to increase stability of the tunnel we used the ling-cut method, 0.8m for one step excavation, shotcrete with 25cm thick, steel lib with H-
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