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기존 2층 피복 테트라포드 상부에 추가 거치되는 피복재(테트라포드)의 안정계수: 정적거치 조건
김영택1, 이종인2
1한국건설기술연구원 국토보전연구본부 연구위원 2전남대학교 공과대학 토목공학과 교수
Stability Number of Additionally Placed Armor Unit (Tetrapod) Covered on Existing Two-Layered Tetrapod Rubble Mound Structures: Pattern Placing Condition
1Research Fellow, Department of Land, Water and Environment Research, Korea Institute of Civil Engineering and Building Technology 2Department of Civil Engineering, Chonnam National University, 50, Daehak-ro, Yeosu, Jeonnam 59626, Korea
Corresponding author:
Jong-In Lee ,Tel: +82-61-659-7321, Fax: +82-61-659-7329, Email: jilee@chonnam.ac.kr
Received: November 23, 2020; Revised: December 14, 2020. Accepted: December 15, 2020.
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ABSTRACT
Since the aging of coastal structures have been increased, the researches about the reinforcements of the existing aged structures are needed. Especially, the existing armor units placed on rubble mound structures should satisfy the stability against the increased design wave conditions. However the researches about these design problems have not been performed. In this study, the hydraulic model tests to investigate the stability number about the additionally placed armor unit were conducted. The main armor unit is a Tetrapod. The test results showed that the stability number (Kd) for additionally placed armor units(Tetrapod) increased up to maximum 10% comparing with that for 2 layers tetrapod (Kd = 8) within these test conditions with the pattern placing for existing armor layers and the stable armor layer slope for the non overtopping condition.