. Concepts for drilling and excavating in and below the ocean bottom. Underwater drilling; Ocean bottom. soft bottom Figure 46. Concept of a barge-mounted work system for local excavation. Summary Adequate pressure-resistant buoyancy systems are available, but costs for depths to 20,000 feet are inordinately high, suggesting investigation of new approaches such as benef iciated wood. Future Plans No active research and development are planned in the area of buoyancy, except for limited, informal small-scale pressure chamber trials of a few simple systems for impregnating and sheathing wood. SH
. Concepts for drilling and excavating in and below the ocean bottom. Underwater drilling; Ocean bottom. soft bottom Figure 46. Concept of a barge-mounted work system for local excavation. Summary Adequate pressure-resistant buoyancy systems are available, but costs for depths to 20,000 feet are inordinately high, suggesting investigation of new approaches such as benef iciated wood. Future Plans No active research and development are planned in the area of buoyancy, except for limited, informal small-scale pressure chamber trials of a few simple systems for impregnating and sheathing wood. SHALLOW DRILLING AND EXCAVATING The operations described in this section are those which in surface operations normally would be done by bulldozing, scarifying, scraping, shallow auger drilling, and loading and removal of the spoil from the site, or using it for backfill. These are all specific operations requiring great operator skill and, to achieve accuracy, repeated checking of grade, tamping, etc. There is at pre- sent no reasonable hope of performing these same functions on the ocean bottom in the same manner. Fortunately, there appears to be no need to use established terrestrial methods. 58. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Naval Civil Engineering Laboratory (Port Hueneme, Calif. ). Port Hueneme, Calif. : Naval Civil Engineering Laboratory
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Keywords: ., bookcentury1900, bookcollectionbiodivers, booksubjectoceanbottom
