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一、前言深海吸砂船的设计方案,经过去年一年的反复研究、逐步改进,总轮廓已经完成,但还有许多不完善之处,提请大家批评指正。二、海砂情况 1975年,日本的取砂量约为9,400万m~3,其中海砂为2700万m~3。目前,河川砂和陆地砂占多数,但由于受到种种限制,使其生产停滞。而海砂尽管有某些缺点(如含盐分等),但还可代替陆地砂,做为今后稳定的材料来源,迫切希望尽快生产。现在,取海砂主要是九州、四国、中国等地。取砂船有:抓斗船、链斗船、泵船等,已达1000艘,近畿以东地区也趋向于取海砂。
I. INTRODUCTION The design of the deep-sea suction sand-holding vessel has been gradually improved after repeated studies last year. The general outline has been completed. However, there are still many imperfections to draw attention to. Second, the situation of sea sand In 1975, Japan’s sand was about 94 million m ~ 3, of which 27 million m 3 sea sand. At present, river sand and land sands account for the majority, but their production is stagnant due to various restrictions. The sea sand despite its shortcomings (such as salt tolerance), but also can replace the land sand, as a stable source of future materials, an urgent hope that as soon as possible. Now, take the sea is mainly Kyushu, Shikoku, China and other places. Grasping sand ships are: grab bucket, chain bucket boats, pump boats, has reached 1,000, the area east of Kinki also tend to take the sea sand.