Anacapa Island Split Pipe Installation Inspection and Repair, 1978-1979

摘要

The U.S. Navy currently maintains and operates numerous underwater power and signal cables. Most of the these cables utilize split pipe systems to protect the cable from damage in the surf zone and when crossing exposed rocky seafloors. Past experience has shown that the hardware used to install the split pipe system lacks the reliability and maintenance-free operation required for the life of the cables. Based on previous experience with cable failures, the areas determined to be in greatest need of investigation are fasteners for holding the split pipe halves together, immobilization of the pipe, and cathodic protection for the entire system. As a result, CEL tested prototype and commercially available hardware components which appeared to be suitable replacements for the existing split pipe hardware. The candidate hardware was then used in a 300-foot-long test section of split pipe installed March 1976 at Anacapa Island, to be inspected during a five-year-period. This report presents the results of the October 1978 inspection conducted 2-1/2 years after installation of the test system. Also discussed is the repair operation conducted in March 1979 to replace those sections of split pipe which were damaged during a severe storm in January 1978. (Author)