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A Bottom Sitting Diver-operated Sampler for Engineering Properties

出版	Environmental Research Laboratories, 1972
URL	http://books.google.com.hk/books?id=Nbobi8xFjl0C&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN

註釋A diver-operated sampler, capable of taking relative undisturbed samples 8.9 cm in diameter and 70 cm in length, is described in this report. The sampler was designed specifically to obtain reliable samples of near-surface unconsolidated and semi-consolidated marine sediments. Samples of sediments, taken from a selected test site in San Francisco Bay, were analyzed for their mass properties (porosity, density, etc.) and engineering properties (shear strength, bearing capacity). These data were correlated to acoustic measurements made in conjunction with a geophysical experiment conducted over the same area. The data obtained confirms a better sampling capability over devices previously used. With some engineering modification, this tool may have application in sampling placer-type mineral deposits of marine occurrence.