Stability of Dolos and Tribar Overlays for Rehabilitation of Stone-Armored Rubble-Mound Breakwater and Jetty Trunks Subjected to Breaking Waves
Abstract
An experimental model investigation was conducted to obtain design guidance for dolos and tribar overlays used to rehabilitate stone-armored rubble-mound breakwater and jetty trunks subjected to breaking waves. It was concluded that: a. Randomly placed dolos are an acceptable option, provided that a stability coefficient of 12 is used to size the units. b. Dolos stability proved to be sensitive to relative depth (d/L) and relative wave height (H/d) with minimum stability occurring at the lower values of d/L and higher values of H/d i.e., longer wave periods in shallower water. c. Randomly placed tribars are not recommended at slopes steeper than IV on 2H; however, they may be used at milder slopes with a stability coefficient of 9. d. Uniformly placed tribars are an acceptable option for a lV-on-1.5H slope, provided they are used in concert with toe buttressing stone, size selection is based on a stability coefficient of 7, and placement of the units replicates that used in the model. e. Tribar stability appears to be insensitive to d/L and H/d for both types of placement.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1988
- Accession Number
- ADA622243
Entities
People
- Brenda J. Wright
- Robert D. Carver
Organizations
- Coastal Engineering Research Center