Unclassified 



SECURITY CLASSIFICATION OF THIS PAGE (When Da.a 



Entered) 





REPORT DOCUMENTATION PAGE 



READ INSTRUCTIONS 

 BEFORE COMPLETING FORM 



1. REPORT NUMBER 



TR-805 



2 GOVT ACCESSION NO. 



3, RECIPIENT'S CATALOG NUMBER 



>. TITLE r<-.s„..„e, LONG-TERM DEEP-OCEAN TEST 

 OF CONCRETE SPHERICAL STRUCTURES-Part I: 

 Fabrication, Emplacement, and Initial Inspections 



5. TYPE OF REPORT & PERIOD COVERED 



Not final; July 1971-June 1973 



6. PERFORMING ORG. REPORT NUMBER 



7, AUTHORfs,^ 



Harvey H. Haynes 





9. PERFORMING ORGANIZATION NAME AND ADDRESS 



CIVIL ENGINEERING LABORATORY 

 Naval Construction Battalion Center 

 Port Hueneme, California 93043 



10 PROGRAM ELEMENT PROJECT, TASK 

 AREA a WORK UNIT NUMBERS 



3.1610 



11. CONTROLLING OFFICE NAME AND ADDRESS 



Naval Facilities Engineering Command 

 Alexandria, VA 223 32 



March 1974 



13. NUMBER OF PAGES 



43 



U- MONITORING AGENCY NAME S ADDRESSfif dillerent Irom Conlrol/.nfi Ollice) 



15. SECURITY CLASS (ot this report) 



Unclassified 



15a. DECLASSIFICATION DOWNGRADING 

 SCHEDULE 



16. DISTRIBUTION STATEMENT (ol IhU ReporO 



Approved for public release; distribution unlimited. 



17. DISTRIBUTION STATEMENT (ol the nbslracl entered in Block 20, il dillerenl Irom Report) 



16 SUPPLEMENTARY NOTES 



19. KEY WORDS (Continue on reverse side it necessary and identity by block number) 



Concrete structures, pressure-resistant structures, concrete spheres, permeability, implosion, 

 submerged concrete structures, seawater permeability of concrete, long-term loading, 

 unreinforced concrete. 



20, ABSTRACT (Continue on reverse side It necessary and identity bv block number) 



This report summarizes the fabrication, emplacement and inspections during the first 

 1.2 years of submergence of eighteen 66-inch-OD concrete spheres. The spheres are located 

 4 miles south of Santa Cruz Island, California, in depths of water from 1,840 to 5,075 feet. 

 The purpose of the test is to collect data on time-dependent failure, permeability and 

 durability of concrete pressure-resistant structures. Findings from the inspections showed 

 that two spheres located at the depths of 3,725 and 4,330 feet had imploded and that the 



DD , j°r73 1473 EC 



NOV 65 IS OBSOLETE 



Unclassified 



■ CLASSIFICATION OF 



AGE (When Da 



WIBL/WHOI 



03D1 D0MD41D T 



