多軸応力下における岩石の破壊条件と中間主応力の影響

概要

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In order to investigate the effect of the intermediate principal stress on failure strength of rock and failure condition of rock under the multiaxial stresses, the true triaxial compression tests are carried out on two kinds of rocks, namely KIMACHI snadstone and OGINO tuff. For this test, a true triaxial compression testing machine using the cubic specimen was designed as shown in Fig.2 and Photo.1. The main results obtained in this study are summarized as follows ; From the experimental results under the various combined triaxial compressive stresses, it becomes clear that the intermediate principal stress has an effect on the failure strength of rock, and the degree of its effect on the failure strength of rock is different for each rock. Also, under the multiaxial stresses including tension to compression stress field, the failure condition of rock can be expressed by Murrell's criterion rather than Drucker-Prager's one.
一般社団法人日本応用地質学会の論文
1986-03-31