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대천-원산도 해저터널 부지조사를 위한 단일채널 탄성파자료의 정밀 처리 및 분석
김원식 ( Won Sik Kim ),박의섭 ( Eui Seob Park ),이호영 ( Ho Young Lee ),김현도 ( Hyun Do Kim ),박근필 ( Keun Pil Park ),구남형 ( Nam Hyung Koo ),정순홍 ( Sn Ons Cheong ) 한국지구물리·물리탐사학회 2010 지구물리와 물리탐사 Vol.13 No.4
The Single-channel seismic survey with the source of bubble pulser and drilling survey was carried out in 2008 and 2009 for the site survey of Daecheon-Wonsando area, which was a proposed area of Korea-China subsea tunnel. The goal of this study is to analyze the depth and characteristics of acoustic basement for the stability assessment and tunnel design in this proposed area through combining drilling data with this single-channel seismic data after detailed processing. For this purpose, among the data processing schcmcs which are usually applied to multi-channel seismic data. we applied the F-K filtering to eliminate the AC(alternating current) noise and the post-stack depth migration to produce depth section. As a result, we verified that the improved depth section could bc obtained from single-channel seismic data, and the distribution and characteristics of basement could be analyzed in survey area through the combined analysis with drilling data. However, we could not interpret the detailed structures, fault and fracture zone, due to the quality of bubblc pulscr source and single-channel data. We expect that those detailed structures can be analyzed when higher resolution seismic data is provided. Therefore, we recommend some items for future seismic survey of subsea tunnel to obtain the high resolution seismic data.