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- 저자 : ( Xunhui Xu ) (검색결과 1 건)
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( Xunhui Xu ),( Han Bao ),( Guobiao Zhang ),( Changgen Yan ) 대한지질공학회 2019 대한지질공학회 학술발표회논문집 Vol.2019 No.2
Morphology is an important factor affecting the shear behavior of rock joint. For the purpose of analyzing the relationship between the morphology and the shear behavior of joint, based on 3D laser scanning, the morphology of the joint was obtained, and the molds of joint produced by 3D printing technology were used to make joint replicas with three different compressive strengths. The shear tests in eight shear directions under different normal stresses were conducted on the replicas. The results showed that, under low normal stress, the anisotropy of the peak shear strength does not present simple monotone to the normal stress, and the shear direction has a stronger influence on c than φ. By considering different normal stresses(low and high normal stresses), Gα3D(3D topography parameter of joint obtained by 3D laser scanning before shearing) and as(the proportion of damaged areas of joint after shearing based on image-processing technique), two shear strength models which are suitable for low and high normal stresses were proposed in this study, respectively. Through experimental verification, it was found that the shear strengths of joint calculated by the proposed models are highly fitted to the test results. It can be highly practical to use the models when the morphology before shearing, the feature of the damaged surface after shearing, and the normal stress are already known.
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