Experiments for Amour Stability of Low Crested Structure Covered by Tetrapods

Lee, Jong-In, Bae, Il Rho, Moon, Gang Il

doi:10.12652/Ksce.2019.39.6.0769

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2019 Vol.39, Issue 6 Preview Page Next Page

Coastal and Harbour Engineering

Experiments for Amour Stability of Low Crested Structure Covered by Tetrapods 저 마루높이 구조물의 피복재 안정성 실험: Tetrapod 피복 조건

December 2019. pp. 769-777

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Abstract

이안제와 잠제(인공리프)와 같은 저 마루높이 구조물은 수중구조물은 연안역의 침식 등의 대책으로 일반적으로 사용되고 있다. 이러한 구조물의 피복재 안정성은 비월파조건의 구조물 보다 낮을 수 있다. 기존 연구에서는 대부분 사석으로 피복된 구조물을 대상으로 안정성을 검토하였다. 본 연구에서는 테트라포드로 피복된 저 마루높이 구조물과 수중구조물을 대상으로 안정성을 검토하기 위해 2차원 수리실험을 수행하였다. 피복재 안정성은 구조물 상부, 전사면 및 후사면을 대상으로 파형경사와 여유고를 변화시키며 검토하였다. 피복재의 주된 피해는 전사면 상부와 바다측 마루부에서 발생하였다. 실험결과를 이용하여 테트라포드의 안정계수를 산정할 수 있는 경험식을 제안하였다.

키워드

저 마루높이 구조물

인공리프

수리모형실험

테트라포드

경험식

Low crested coastal structures such as detached breakwaters and submerged breakwaters (artificial reefs) have been commonly used as coastal protection measures. The armour units of these structures are unstable than those in non-overtopped structure cases. The stability of low crested structures armoured by rock has been suggested in existing studies. In this study, the stability of Tetrapods armour units on theses structures has been investigated using two-dimensional hydraulic model tests. The effect of wave steepness and freeboard on the armour stability on crest, front, and the rear slope has been investigated. Armour units were mostly damaged near the upper part of the seaward slope and the crest of the seaward side. From the experimental data, the new empirical formula for the stability coefficients of the Tetrapods was proposed.

Keywords

Low crested structure

Artificial reef

Hydraulic model experiment

Tetrapod

Empirical formula

References

Van der Meer, J. W. and d'Angremond, K. (1991). "Wave transmission at low-crested structures." Coastal structures and breakwaters, ICE, Thomas Telford, London, United Kingdom, pp. 25-42.

10.1680/csab.16729.0003

Van der Meer, J. W. and Pilarczyk, K. W. (1990). "Stability of low- crested and reef breakwaters." Proc. 22th Coastal Conference (ICCE), ASCE, Delft, The Netherlands.

Vidal, C., Losada, M. A., Medina, R., Mansard, E. P. D. and Gomez-Pina, G. (1992). "An universal analysis for the stability of both low-crested and submerged breakwaters." 23rd Coastal Engineering, Venice.

Information

Publisher :Korean Society of Civil Engineers
Publisher(Ko) :대한토목학회
Journal Title :JOURNAL OF THE KOREAN SOCIETY OF CIVIL ENGINEERS
Journal Title(Ko) :대한토목학회 논문집
Volume : 39
No :6
Pages :769-777
Received Date :2019. 10. 30
Revised Date :2019. 11. 08
Accepted Date : 2019. 11. 08
DOI :https://doi.org/10.12652/Ksce.2019.39.6.0769

JOURNAL OF THE KOREAN SOCIETY OF CIVIL ENGINEERS ISSN:1015-6348(Print) 2287-934X(Online) 대한토목학회 논문집

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