Long-Term Deep-Ocean Test of Concrete Spherical Structures. Part I:Fabrication, Emplacement,and Initial Inspections.

摘要

The report summarizes the fabrication,emplacement and inspections during the first 1.2years of submergence of eighteen 66-inch-OD concrete spheres. The spheres are located 4miles south of Santa Cruz Island,California,in depths of water from 1,840to 5,075feet. 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 3,725and 4,330feet had imploded and that the quantity of seawater which permeated through the concrete for phenolic-coated spheres was about 0.8cu ft and for uncoated spheres it was about 1.6cu ft. This test program is planned to continue through 1981 (total of 10years). (Author)