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기술사례 : 소음 및 진동을 고려한 도심지 내 대단면 수직구 발파설계 사례 -싱가포르 Transmission Cable Tunnel EW2 공구-
김지연 ( Ju Lie Kim ),이효 ( Hyo Lee ),김도훈 ( Da Ve Kim ),고태영 ( Tae Young Ko ),이승철 ( Si Mon Lee ) 대한화약발파공학회 2013 화약발파 Vol.31 No.1
With increasing needs in power, Singapore is requiring stronger power transmission. Singapore Transmission Cable Tunnel is underground tunnel for transmission system installation such as 400 kV cable. This Transmission Cable Tunnel is 35 km long in total. The North-South Transmission Cable Tunnel is 18.5 km long and there is a total of three (3) contracts; NS1, NS2 and NS3 in respect of the design and construction. The East-West Transmission Cable Tunnel is 16.5 km long, and also there is a total of three (3) contracts; EW1, EW2 and EW3. Among of them, SK E&C has been awarded and operating contract EW2 and NS2. In scope of works, each contract has 3 to 4 shafts which connect aboveground and underground high volt cable and those shafts are used as TBM launching shafts during construction. Transmission Cable Tunnel is undercrossing middle of Singapore and most of shafts are located in urban area. Thus, optimal blasting design satisfying high blasting efficiency as well as blasting vibration limit of Singapore is highly required. Blasting design for large shaft of Singapore Transmission Cable Tunnel follows blasting vibration limits in Singapore and reflects our blasting engineering skills. With Singapore Transmission Cable Tunnel Contract EW2, it is expected that our excellent blasting engineering and performance skills can be delivered to the world.
기술사례 : 터널막장 전방 파악을 위한 TSP(Tunnel Seismic Prediction) 탐사 사례 연구
조성원 ( Sung Won Cho ),이효,유재원 ( Jae Won Yoo ),김도훈 ( Da Ve Kim ),남승혁 ( Seung Hyeok Nam ) 대한화약발파공학회 2013 화약발파 Vol.31 No.2
To predict ground conditions ahead of the tunnel face, seismic refraction survey has been widely used. But due to the development in seismic equipment and techniques, tomography using borehole and others are actively applied in recent years. This study has a purpose to prevent stability problems during excavation and construction of tunnels by predicting unfavorable ground conditions such as fault, fractured zone and rock quality variation zone ahead of the tunnel face using TSP survey equipment. In this study, the validity of predicting ground conditions ahead of tunnel face by TSP survey has been evaluated through the case study in the road construction site.