STABILITY OF HIGH-SPECIFIC GRAVITY ARMOR BLOCKS

Proceedings of the International Conference on Coastal Engineering

Hiroshi Murakami²  Yuichi Iwagaki²  Masato Yamamoto¹  Minoru Hanzawa¹  Kenji Nemoto¹  Masahiro Ito² 

[1] Nippon Tetrapod Co. Ltd.;Department of Civil Engineering, Meijo University

关键词: armor;    armor blocks;    armor stability;   

DOI  :  10.9753/icce.v24.%p

学科分类：建筑学

来源: Coastal Engineering Research Council

【 摘 要 】

The stability coefficient of the well-known the Hudson formula, KD, has been established by many laboratory tests for various types of armor blocks with a range of specific gravity 2.16-2.47 representative of normal concrete. Design manuals for coastal structures do not describe the adoption of high-specific gravity armor blocks for use in field construction. To examine the effect of specific gravity on stability of Tetrapods, then a laboratory test was conducted by using Tetrapod models of different weights which are composed of five values of specific gravities. Temporal changes of damage ratio arranged test conditions that satisfy the Hudson formula do not coincide among each other, depending on wave period and specific gravity. The effect of the specific gravity on their stability is discussed. As a result, it is found that the relationship between the stability and the specific gravity is considerably affected by the surf similarity parameter and Reynolds number.

【 授权许可】

Unknown