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趙萬燮,曺義權,金沂柱 全北大學校 1996 論文集 Vol.42 No.-
To construct a structure in rock, first of all, the mechanical behavior of the rock should be understood. Most of rocks in situ have contained mechanical weak planes which greatly influenced on the mechanical behavior of the rock. On this study, hard rock was used to investigate in influence of the weak plane on the peak strength and displacement behavior. The results were summarized as follows; 1. When the angle of a weak plane(α) was 30。, the lowest peak strength was appeared. And the peak strengths between 30。to 45。were increased with increasing angles of weak plane. But the anisotropy of peak strength by the angle of weak plane was not remarkable in the comparision with that of soft rock, Tuff. The reason is the influence of the angle of the internal friction of the weak plane. 2. Different from soft rock, the peak strength was higher α= 60。than 90。with the lowest rate of displacement (1㎛/sec) in case of hard rock. It shows that the peak strength of weak plane is chiefly influenced by coefficient of internal friction rather than cohesion.