Effects of Layer Thickness and Core Material on Stability of Wave Dissipating Concrete Blocks

Horizontally composite breakwaters covered fully with wave-dissipating concrete blocks have been widely used in Japan because of the efficiency in rapid construction. However, in recent years, due to economical advantage, layered covered types having the core material beneath the primary cover layer have been increasingly constructed. It has been pointed out the influence of layer thickness and permeability of core material on the stability of armor units used for rubble mound breakwaters. Although these factors also affect the stability of armor blocks in horizontally composite breakwaters, such influences have not yet been evaluated quantitatively. In this paper, the results of a series of hydraulic model experiments are described. First, stability tests were conducted under several combinations of layer thickness and core material. Second, the velocity fields on the breakwater were measured to correlate the wave force with the stability test results. Finally, an assessment methodology of the interlocking force in the armor layer based on possible displacement length is proposed and applied to dolos armor layer.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0784407339
• Corporate Authors:

  American Society of Civil Engineers

  1801 Alexander Bell Drive
  Reston, VA  United States  20191-4400
• Authors:
  • Kubota, Shin-ichi
  • Kobayashi, Shigetaka
  • Matsumoto, Akira
  • Hanzawa, Minoru
  • Matsuoka, Michio
• Conference:
  • Coastal Structures 2003
  • Location: Portland Oregon, United States
  • Date: 2003-8-26 to 2003-8-30
• Publication Date: 2004

Language

• English

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 126-136
• Monograph Title: Coastal Structures 2003

Subject/Index Terms

• TRT Terms: Breakwaters; Coastal engineering; Concrete blocks; Hydraulics; Rubble mound breakwaters; Stability (Mechanics); Structural analysis; Thickness; Wave height; Wave motion; Waves
• Subject Areas: Marine Transportation; Materials;

Filing Info

• Accession Number: 01003542
• Record Type: Publication
• ISBN: 0784407339
• Files: TRIS
• Created Date: Sep 1 2005 7:26AM