http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
鋼管多段 Grouting 工法의 Tunnel 補强效果에 關한 硏究
박진원,류체천,김송만,박춘수 충남대학교 산업기술연구소 2001 산업기술연구논문집 Vol.16 No.1
When Umbrella Arch Method is applied in construction of the first Ok-chon tunnel which have soft ground zone or fractured zone, the result as finite element analysis method, the PENTAGON-2D, is following. 1)There is little effect in bottom displacement due to side wall reinforcement, but side wall displacement decrease 50%. 2)Before reinforced by Umbrella Arch Method, rockbolt axial stress is 16 ton which exceed allowed axial stress, however after reinforced, that is about 5.5ton in up and down path, therefore rockbolt axial stress after reinforced is safe. 3)In shotcrete, compression stress decrease average 65% and shearing force and bending moment is decrease more than average 65%. hence shotcrete has great effect on ground reinforcement in side wall. 4)Umbrella Arch Method was proven as assistant method in fractured zone, but in long term stability, judging the fact that bottom displacement is slightly great, the tunnel invert is continued. Or bottom must be reinforced with reinforced with reference to field measurement data in excavation.