試錐による大分市中心部の第四紀層の研究

概要

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On the basis of data obtained from boring and surface survey to Quaternary sediments in the district under consideration, has it become clear that thikness of the alluvium is less than 15m. and early to middle Pleitocene formations lie under the Alluvium. Besides standard penetration test to these sediments indicates that N value of Alluvial fine to medium sand and silt is not more than 10 at shallower than 5m. underground, while that of Diluvial sand is more than 25 at deeper than 15m. But as for gravel, their N value is not always in proportion to depth where they lie. The Alluvium is composed mostly of shllow sea sediments, on the other hand, the Diluvium contains very often tuffs, and lacustrine materials in the lower part and bay ones in the upper.
一般社団法人日本応用地質学会の論文