海底土質の判別法に関する研究
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概要
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Investigations on echo soundings from the sea bottom of mud and soil have been carried out. The frequency characteristics of acoustical properties of Arakida and fly ash, which are typical soil of clay (very fine particles) and silt (relatively coarse particles) respectively, were obtained by a horizontal type experimental tank. The transmission and reflection echo characteristics on both soil were observed over a range of apparent density, from 1.01 to 1.5, at three frequencies, 200kHz, 100kHz, 14kHz. At a fixed frequency, fly ash is far more transparent to ultrasonics, and gives weaker echo from the surface of soil than Arakida. From these result, the nature of the soil of sea bottom can be determined by analysing the echo at many frequencies.
- 独立行政法人 海上技術安全研究所の論文
- 1972-02-29