STABILITY OF ARMOR UNITS COVERING RUBBLE MOUND OF COMPOSITE BREAKWATERS AGAINST A STEADY OVERFLOW OF TSUNAMI

Proceedings of the International Conference on Coastal Engineering

Jun Mitsui²  Minoru Hanzawa²  Akira Matsumoto²  Kazuo Nadaoka¹ 

[1] Tokyo Institute of Technology;Fudo Tetra Corporation

关键词: tsunami;    overflow;    armor unit;    stability;    harbor-side;    breakwater;   

DOI  :  10.9753/icce.v34.structures.34

学科分类：建筑学

来源: Coastal Engineering Research Council

【 摘 要 】

This paper presents a simple and highly accurate stability estimation method for armor units covering breakwater rubble mounds against tsunami overflow. In this method, overflow depth is used to represent the external force. This enables an easier and more robust estimation of the required mass of the armor units than the conventional method based on flow velocity. This method takes into account the influence of the impingement position of the overflow jet and the influence of harbor-side water depth, both of which are important factors for armor stability. Numerical computation is also carried out aiming at the establishment of a stability analysis method for armor units. The validity of the computation method is confirmed by comparing the measured current field. The stability of armor units is investigated by computing the hydraulic force acting on each armor unit.

【 授权许可】

Unknown