nnr.lassifjp.d 



SECURITY CLASSIFICATION OF THIS PAGE 



REPORT DOCUMENTATION PAGE 



Form Approvea 

 0MB No 07040188 

 Exp Dare lun 30. 1986 



la REPORT SECURITY CLASSIFICATION 



Unclassified 



lb RESTRICTIVE MARKINGS 



2a SECURITY CLASSIFICATION AUTHORITY 



2b. DECLASSIFICATION /DOWNGRADING SCHEDULE 



3 DISTRIBUTION /AVAILABILITY OF REPORT 



Approved for public release; distribution 

 unlimited. 



4 PERFORMING ORGANIZATION REPORT NUMBER(S) 

 Technical Report REMR-CO-6 



5 MONITORING ORGANIZATION REPORT NUMBER(S) 



6a NAME OF PERFORMING ORGANIZATION 



USAEWES, Coastal Engineering 

 Research Center 



6b OFFICE SYMBOL 

 (If applicable) 



7a NAME OF MONITORING ORGANIZATION 



6c, ADDRESS {.City, Stare, and ZIP Code) 

 PO Box 631 

 Vicksburg, MS 39180-0631 



7b. ADDRESS (Oty, State, and ZIP Code) 



Ba. NAME OF FUNDING /SPONSORING 

 ORGANIZATION 



US Army Corps of Engineers 



OFFICE SYMBOL 

 (If applicable) 



9. PROCUREMENT INSTRUMENT IDENTIFICATION NUMBER 



Be. ADDRESS (Oty, State, and Z/P Code) 

 Washington, DC 2031A-1000 



10 SOURCE OF FUNDING NUMBERS 



WORK UNIT 

 ACCESSION NO 



32325 



1 1 TITLE (Include Security Classification) 

 Stability of Dolos Overlays for Rehabilitation of Tribar-Armored Rubble-Mound 

 Breakwater and Jetty Trunks Subjected to Breaking Waves 



12 PERSONAL AUTHOR(S) 



Carver, Robert D.; Wright, Brenda J. 



14 DATE OF REPORT [Year, Monthi. Day) 15 PAGE COUNT 

 August 1988 35 



13a TYPE OF REPORT 



Final report 



13b TIME COVERED 

 FROM 



16. SUPPLEMENTARY NOTATION A report of the Coastal problem area of the Repair, Evaluation, Main- 

 tenance, and Rehabilitation (.REMR) Research Program. Available from National Technical 

 Information Service. 5285 Port Royal Road. Springfield. VA 22161. 



COSATI CODES 



18 SUBJECT TERMS (Continue on rei/erse if necessary and identify by block number) 

 Armor units Jetties 



Breakwaters Rubble mound 



19 ABSTRACT (Continue on reverse if necessary and identify by block number) 



An experimental model investigation was conducted to obtain design guidance for dolos 

 overlays used to rehabilitate tribar-armored rubble-mound breakwater and jetty trunks 

 subject to breaking waves. It was concluded that: 



a. The stability coefficient is Independent of sea-side structure slope for slopes of 

 IV on 1.5H and IV on 2H. 



b. Stability showed some dependency on both d/L and 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. The minimum stability coefficient observed significantly exceeds that obtained for 

 new construction. 



20 DISTRIBUTION /AVAILABILITY OF ABSTRACT 

 D UNCLASSIFIED/UNLIMITED S SAME AS RPT 



n OTIC USERS 



21 ABSTRACT SECURITY CLASSIFICATION 



Unclassified 



22a NAME OF RESPONSIBLE INDIVIDUAL 



22b TELEPHONE (/nc/ude Area Code) 22c OFFICE SYMBOL 



DO FORM 1473, 84 MAR 



83 APR edition may be used until exhausted 

 All other editions are obsolete 



SECURITY CLASSIFICATION OF THIS PAGE 



Unclassified 



