Journal of Conservation Science (보존과학회지)

The Korean Society Of Conservation Science For Cultural Heritage (한국문화재보존과학회)
권호 표지
DOI QR코드

DOI QR Code

Deterioration Assessment and Structural‐Reinforcement of Stone Lantern of the Four Guardian Kings in Beopjusa Temple, Boeun

보은 법주사 사천왕석등의 비파괴 훼손도 평가 및 구조보강

  • Choie, Myoungju (Conservation Science Division, National Research Institute of Cultural Heritage) ;
  • Lee, Myeong Seong (Conservation Science Division, National Research Institute of Cultural Heritage) ;
  • Jun, Yu Gun (Conservation Science Division, National Research Institute of Cultural Heritage) ;
  • Lee, Mi Hye (Conservation Science Division, National Research Institute of Cultural Heritage) ;
  • Kim, Yuri (Conservation Science Division, National Research Institute of Cultural Heritage) ;
  • Ha, Jun Kyeong (Song Baek Conservation Tech)
  • 최명주 (국립문화재연구소 보존과학연구실) ;
  • 이명성 (국립문화재연구소 보존과학연구실) ;
  • 전유근 (국립문화재연구소 보존과학연구실) ;
  • 이미혜 (국립문화재연구소 보존과학연구실) ;
  • 김유리 (국립문화재연구소 보존과학연구실) ;
  • 하준경 ((주)송백보존테크)
  • Received : 2016.11.04
  • Accepted : 2017.02.03
  • Published : 2017.02.20
Download PDF
⟨ Previous Next ⟩

Abstract

The stone lantern of the four guardian kings in the Beopjusa temple at Boeun was mainly made of biotite granodiorite consisting of porphyritic-textured potassium feldspar and included in ilmenite series. A base stone made of alkali granite was buried, after founded its place during an earlier restoration process. Cracking and break out are noticeable on this object. In addition, discoloration, salt crusting, and epiphytes were observed. The lantern was vulnerable in terms of physical and structural stability caused by cracking in the front and back of the light chamber and in the non-horizontal direction. According to the conservational condition of the stone lantern, structural reinforcement was carried out based on calculations, including those on the position, size, and anchor length of the titanium stiffener. Chemical and biological pollutants were washed off without damage to the surface of the stone material. Oxygenated iron pieces were replaced with titanium. Ethyl silicate was applied to the surface of the lantern for consolidation and smooth drainage.

보은 법주사 사천왕석등의 주부재는 K-장석이 반상조직을 보이는 티탄철석계열의 흑운모 화강섬록암 석재이며, 땅 속에 묻혀있던 알칼리 화강암 재질의 하대하석 및 지대석이 복원되며 본래의 모습을 되찾았다. 석등에는 균열 및 탈락에 의한 손상이 두드러지게 발생하였으며 이외에도 변색, 염 침착 및 생물 착생 등이 관찰된다. 특히 화사석의 전면과 후면을 관통하는 균열과 수평 불균형으로 인해 물리 및 구조적 안정성이 취약한 상태이다. 이에 따라 티타늄 보강재의 위치, 규격 및 정착 길이를 산정하여 구조적 보강을 실시하였다. 화학 및 생물학적 오염물은 석재에 손상을 주지 않는 한도 내에서 세정하고 산화된 철편을 티타늄제로 교체하였다. 또한 에틸 실리케이트계 강화제를 도포하여 암석의 강화와 원활한 수분 배출을 유도하였다.

Keywords

References

  1. Bae, B.S., Kim, H.Y., Kim, S.D., Lee, D.S. and Hong, S.G., 2013, Restoration of stone cultural heritage using metal reinforcement armature. 10-2012-0127209, Republic of Korea. (in Korean)
  2. Baek, S.C., Kim, Y.T., Kim, H.T., Yoon, J.S. and Lee, Y.C., 2006, Evaluation of rock uniaxial compressive strength using ultrasonic velocity. Journal of Korean Geo-environmental Society, 7, 33-42. (in Korean with English abstract)
  3. Choi, B.S., Kim, Y.C., Kim, H.Y., Kim, S.D. and Lee, D.S., 2014, Metal reinforcement method of stone cultural heritage. 10-2014-0013801, Republic of Korea. (in Korean)
  4. Kim, S.D., Lee, M.S., Han, B.I., Lee, J.J. and Song, C.Y., 2009, Deterioration diagnosis and conservation treatment of the Jincheon Sagongnimaaeyeoraeipsang (Stone relief of standing buddha in Sagok-ri), Korea. Journal of Conservation Science, 25(3), 323-333. (in Korean with English abstract)
  5. Kim, S.D., Lee, D.S. and Kim, H.Y., 2012, A study on the anchorage length of metal stiffeners for the structural reinforcement of stone cultural heritages. Journal of Conservation Science, 28(2), 141-151. (in Korean with English abstract) https://doi.org/10.12654/JCS.2012.28.2.141
  6. Lee, C.H., Jo, Y.H. and Chun, Y.G., 2009, Establishment of ultrasonic measurement and correlations of direct-indirect method for weathering evaluation of stone cultural heritage. Journal of Conservation Science, 25(3), 233-244. (in Korean with English abstract)
  7. Lee, C.H., Jo, Y.H. and Kim, S.D., 2012, Three-dimensional image analysis, deterioration evaluation and scientific conservation treatment of the Daechiri dinosaur trackways in Haman Country, Korea. Journal of the Geological Society of Korea, 48, 179-191. (in Korean with English abstract)
  8. Lee, C.H., Kim, S.D., Han, B.I., Kim, Y.T. and Lee, M.S., 2004, Conservational treatment and deterioration assessment of the sculptured standing buddha named Teahwa 4 year in the Jincheon, Korea. Journal of Conservation Science, 16, 39-51. (in Korean with English abstract)
  9. Lee, C.H., Lee, J.E., Shin, E.J. and Kim, S.D., 2008, Deterioration degree and petrological characteristics of the 10th-storied stone pagoda in Gyeongcheonsa temple, Korea. Journal of the Geological Society of Korea, 44, 765-779. (in Korean with English abstract)
  10. Lee, C.H., Lee, M.S. and Park, B.S., 1980, Geological map of Miweon sheet(1:50000). Geological and Mineral Institute of Korea, 1-29. (in Korean and English)
  11. Lee, D.S. and Kim, H.Y., 2015, A study on structural reinforcement suitable for the weathering properties of stone cultural heritage. Journal of Conservation Science, 31(4), 477-488. (in Korean with English abstract) https://doi.org/10.12654/JCS.2015.31.4.13
  12. Lee, M.S., Jeong, M.H., Jeong, Y.D. and Lee, C.H., 2006, Deterioration and conservation treatment of the three storied stone pagoda in Seoak-ri, Gyeongju. Journal of Conservation Science, 18, 63-74. (in Korean with English abstract)
  13. National Research Institute of Cultural Heritage, 1999, The survey report of stone lantern I. National Research Institute of Cultural Heritage, Korea, 90. (in Korean)
  14. The Aegis of Ministry of Culture and Information, 1977, A comprehensive survey of cultural relics. 1, 510. (in Korean)
  15. Yoo, E.K. and Hong, S.H., 1973, Geological map of Young Yu Ri sheet(1:50000). Geological and Mineral Institute of Korea, 1-21. (in Korean and English)