Journal of Korean Society of Coastal and Ocean Engineers (한국해안·해양공학회논문집)

Korean Society of Coastal and Ocean Engineers (한국해안·해양공학회)
권호 표지
DOI QR코드

DOI QR Code

Hydraulic Experiments on Stable Armor Weight and Covering Range of Round Head of Rubble-Mound Breakwater Armored with Tetrapods: Non-breaking conditions

경사식방파제 제두부에 거치된 Tetrapod의 안정중량 및 피복범위에 관한 수리실험: 비쇄파 조건

  • Kim, Young-Taek (Hydro Science and Engineering Research Institute, Korea Institute of Civil Engineering and Building Technology) ;
  • Lee, Jong-In (Department of Marine and Civil Engineering, Chonnam National University)
  • 김영택 (한국건설기술연구원 수자원.하천연구소) ;
  • 이종인 (전남대학교 공학대학 해양토목공학과)
  • Received : 2017.11.29
  • Accepted : 2017.12.26
  • Published : 2017.12.31
Download PDF
⟨ Previous Next ⟩

Abstract

The re-analysis on the stable weight of the concrete armor unit (CAU) at the roundhead and the suggestion of the covering range at the roundhead with the increased weight of CAU were conducted. Tetrapods were applied to the tests and the three dimensional hydraulic tests were performed. The test results for the stable weight at the roundhead area were similar to the guides from Korean Design Standard for Harbour and Fishery Port (MOF, 2014) and Coastal Engineering Manual (USACE, 2005). The investigation of covering range at the roundhead of rubble mound structures armoured with Tetrapods was suggested that the length of five times of the design wave height from the tip of the superstructure was needed and appropriate. Both sides of the superstructure should be covered with increasing weighted CAU to satisfy the stability at roundhead area.

본 연구에서는 상치콘크리트가 설치되어 있고, 주피복재로 테트라포드(Tetrapod)가 거치된 제두부 구간에 대하여 피복재 안정중량 재분석 및 피복중량의 할증 범위에 대해 검토하였다. 결과 분석을 위하여 3차원 수리실험을 수행하였다. 수리실험 결과에 의하면 항만 및 어항설계기준 해설(MOF, 2014), 미국의 CEM(USACE, 2005) 등에 제시된 제두부 구간에서의 피복재 할증 중량은 적정한 것으로 검토되었다. 테트라포드가 거치된 경사식구조물 제두부 구간 피복재의 할증중량 피복범위는 제두부 기준선을 중심으로 설계파고의 약 5배 범위를 항내측과 항외측에 피복하는 것이 적정한 것으로 검토되었다.

Keywords

References

  1. Allsop, N.W. (1983). Low-crest breakwaters, studies in random waves. Proceedings of Coastal Structures '83, ASCE. 99-107.
  2. British Standard (2000). Maritime Structures.
  3. Broderick, L.L. (1983). Riprap stability a progress report. In: Proc. Specialty Conference on Design, Construction. Maintenance and Performance of Coastal Structures, Arlington, VA. March 9-11, 1983. Coastal Structures '83, ASCE, 320-330.
  4. CIRIA, CUR, CETMEF (2007). The Rock Manual. The use of rock in hydraulic engineering (2nd edition) C683, CIRIA, London.
  5. De Jong, R.J. (1996). Wave transmission at low-crested structure, Stability of Tetrapod at front, crest and rear of a low-crested breakwater. Master thesis, Delft University of Technology, Netherlands.
  6. Hudson, R.V. (1959). Laboratory investigation of rubble-mound breakwaters. Journal of Waterways and Harbors Division, ASCE, 85(WW3), 93-121.
  7. Iribarren, R. (1965). Formule pour le calcul des diques en enrochements naturels on elements artificieles. In: XXI Int. Navigation Congr, Sect. II-I, Stockholm, Sweden, 15-46.
  8. Jansen O.J. (1984). A Monongraph on rubble mound breakwaters, Danish Hydraulic Institute.
  9. Maria, P. Herrera, M. Esther Gomez-Martin and Josep R. Medina (2017). Hydraulic stability of rock armors in breaking wave conditions. Coastal Engineering, 127, 55-67. https://doi.org/10.1016/j.coastaleng.2017.06.010
  10. Melby, J.A. and Kobayashi, N. (1998). Progression and variability of damage on rubble mound breakwaters. Journal of Waterway, Port, Coast and Ocean Engineering, ASCE, 124(6), 286-294. https://doi.org/10.1061/(ASCE)0733-950X(1998)124:6(286)
  11. Ministry of Oceans and Fisheries (2014). Design standards for harbour and fishery port.
  12. Suh, K.-D. and Kang, J. (2012). Stability formula for Tetrapod. Journal of Waterway, Port, Coastal and Ocean Engineering, 138(3), 261-266. https://doi.org/10.1061/(ASCE)WW.1943-5460.0000124
  13. Thompson, D.M. and Shuttler, R.M. (1975). Riprap design for wind wave attack. A laboratory study in random waves. Report EX 707. Hydraulic Research, Wallingford.
  14. USACE (1984). Shore Protection Manual. U.S. Army Coastal Engineering Research Center, U.S. Army Engineer Waterways Experiment Station, Vicksburg, Mississippi.
  15. USACE (2005). Coastal Engineering Manual. U.S. Army Coastal Engineering Research Center, U.S. Army Engineer Waterways Experiment Station, Vicksburg, Mississippi.
  16. van der Meer, J.W. (1987). Stability of breakwater armor layers design formulae. Coastal Engineering, 11, 219-239. https://doi.org/10.1016/0378-3839(87)90013-5
  17. Van der Meer, J.W. (1988). Stability of cubes, tetrapod and accropode. In: Design of Breakwaters, Thomas Telford, London, 71-80.
  18. Van Gent, M.R.A., Smale, A.J. and Kuiper, C. (2003). Stability of rock slopes with shallow foreshores. Coastal Structures 2003, Portland, 100-112.
  19. Vidal, C., Medina, R. and Lomonaco, P. (2006). Wave height parameter for damage description of rubble-mound breakwaters. Coastal Engineering, 53(9), 711-722. https://doi.org/10.1016/j.coastaleng.2006.02.007