岩石供試体と耐圧強度について

概要

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1. The Relation of the Type of Test-piece and its Bearing-power It is important problem that bearing-power of foundation rocks on civil engineering. The writer tried to make the test-piece of rocks and destroyed under compressive-testing-machine, for the measure sake of destroying point on the unit area, and found the standard type of the test-piece. These experimental samples are sandstone and quartz diorite. It was found the difference of bearing-power of the test-piece relate to the alteration of height each of circular-cylinder-type, and tetragonal-prism-type. Consequently, he think that it was right to determine the standard type that the circular-cylinder-types are L/D = 2 (L = length, D = diameter), the tetragonal-prism-types are H/D = 1 (H = Height, L = length of tetragonal). 2. The Relation between Size of Cubic Test-piece and these Bearing-power The writer tested the influence of bearing-power by the variation of size of cubic test-piece. The experimental samples are three kinds of quartz diorite occurred in Mt. Mitoyama, Tokyo. The writer tried the bearing-power examination on the variation of size from these samples, and got the most reasonable size. Consequently, he found that the fittest size of cubic test-piece is 6 cm. cube. Besides, he found it was hardly different that the value of bearing-power on same load-surface both of cubic, and circular-cylinder-type.
社団法人東京地学協会の論文