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首页> 外文期刊>Journal of materials in civil engineering >Mechanical Behavior of Rock-Like Specimens with Hidden Smooth Joints under Triaxial Compression
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Mechanical Behavior of Rock-Like Specimens with Hidden Smooth Joints under Triaxial Compression

机译：隐藏有光滑节理的岩石样件在三轴压缩下的力学行为

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摘要

The mechanical behavior of rock mass is strongly influenced by internal joints. To investigate the effect of hidden joints on the strength and deformation behavior of rock mass, a series of triaxial compression tests was carried out using specimens made from rock-like material. In the experiments, a self-designed pouring apparatus was used to prepare specimens with hidden smooth joints at a given inclination angle. Based on the experimental results of axial stress-axial strain curves, the effect of joint inclination angle and confining pressure on the mechanical behavior of the jointed specimens was analyzed. Four failure modes, which are related to joint inclination angle, were identified. An anisotropic effect parameter was proposed to reflect the degree of strength anisotropy affected by joint angle and confining pressure. It was found that the strength anisotropy decreases with the increase of confining pressure. Finally, the Mohr-Coulomb and the Hoek-Brown failure criteria were applied to describe the strength of the jointed specimens. It was found that the strength parameters of the two failure criteria are closely related to joint inclination angle. The Hoek-Brown failure criterion described the strength envelope of the jointed specimens better than the Mohr-Coulomb failure criterion.
机译：岩体的力学行为受内部节理的强烈影响。为了研究隐藏节理对岩体强度和变形行为的影响，使用由类岩石材料制成的标本进行了一系列三轴压缩试验。在实验中，使用自行设计的浇注设备以给定的倾角制备带有隐藏的光滑接缝的标本。根据轴向应力-轴向应变曲线的实验结果，分析了接头倾角和围压对接缝试样力学性能的影响。确定了与关节倾角有关的四种失效模式。提出了各向异性效应参数，以反映受接头角度和围压影响的强度各向异性程度。研究发现，随着围压的增加，强度各向异性减小。最后，采用Mohr-Coulomb和Hoek-Brown破坏准则来描述接缝试样的强度。发现这两个破坏准则的强度参数与关节倾角密切相关。 Hoek-Brown破坏准则比Mohr-Coulomb破坏准则更好地描述了连接试样的强度包络线。

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