International Society for Rock Mechanics (1981). Rock Characterization Testing & Monitoring, Pergamon Press Ltd, pp. 30-33. International Society for Rock Mechanics (1981). Rock Characterization Testing & Monitoring, Pergamon Press Ltd, pp. 30-33.

Japan Highway Public Corporation (1985). 日本道路工團 NATM 暫定指針 設計要領 第三集, Japan Highway Public Corporation (in Japanese).Japan Highway Public Corporation (1985). 日本道路工團 NATM 暫定指針 設計要領 第三集, Japan Highway Public Corporation (in Japanese).

Jeong, Y. J., Lee, Y. H., Yoon, Y. S., Kim, T. G., Na, Y. S., Choi, S. S. and Seo, Y. S. (2004). “Geological Characteristics of Conglomerate Layer of the Cenozoic Era in Gyeonju-Gampo area,” Conference Proceedings of the Korean Society of Engineering Geology 2004, pp. 67-73 (in Korean).Jeong, Y. J., Lee, Y. H., Yoon, Y. S., Kim, T. G., Na, Y. S., Choi, S. S. and Seo, Y. S. (2004). “Geological Characteristics of Conglomerate Layer of the Cenozoic Era in Gyeonju-Gampo area,” Conference Proceedings of the Korean Society of Engineering Geology 2004, pp. 67-73 (in Korean).

Kim, S. W. and Lee, K. H. (2005). “Rock Classification and Aggregate Evaluation of Tertiary Unconsolidated Deposits,” Journal of Korean Geotechnical Society, Korean Geotechnical Society, Vol. 27, No. 3, p.27-40 (in Korean).Kim, S. W. and Lee, K. H. (2005). “Rock Classification and Aggregate Evaluation of Tertiary Unconsolidated Deposits,” Journal of Korean Geotechnical Society, Korean Geotechnical Society, Vol. 27, No. 3, p.27-40 (in Korean).

Korea Expressway Corporation (2009). Samcheok-Donghae Construction Document, Korea Expressway Corporation. Korea Expressway Corporation (2009). Samcheok-Donghae Construction Document, Korea Expressway Corporation.

Korea Society for Rock Mechanics (2007). Standard Test Method for Determination of the Slake-durability Index of Rock, Korea Society for Rock Mechanics, pp. 245-247 (in Korean). Korea Society for Rock Mechanics (2007). Standard Test Method for Determination of the Slake-durability Index of Rock, Korea Society for Rock Mechanics, pp. 245-247 (in Korean).

Ministry of Land, Transport and Maritime Affairs (2010). Highway Design Manual(Ⅰ), Ministry of Land, Transport and Maritime Affairs. Ministry of Land, Transport and Maritime Affairs (2010). Highway Design Manual(Ⅰ), Ministry of Land, Transport and Maritime Affairs.

The Japanese Railway Society (1993). 道路トンネル觀察․計測指針, The Japanese Railway Society (in Japanese).The Japanese Railway Society (1993). 道路トンネル觀察․計測指針, The Japanese Railway Society (in Japanese).