考虑不同节理倾角和贯通率的类岩材料单轴压缩试验

Uniaxial compression test of rock-like material considering different joint inclinations and penetration rates

为研究节理倾角与贯通率对类岩材料力学特性的影响,选用预制贯通节理类岩材料作为研究对象,对以节理倾角和贯通率为单一变量的两组砂浆试样进行单轴压缩试验。试验结果表明:节理倾角为0°时,随着节理贯通率的增大,试样的峰值强度、峰值应变以及弹性模量均不断减小;不同贯通率试样破坏时均呈现出整体张拉破坏的特征;节理贯通率相同时,随着节理倾角的增大,试样峰值强度呈现V字形变化趋势;试样峰值应变先减小后增大再减小,弹性模量先增大后减小再增大,二者呈现良好对应关系。通过对比节理贯通率和不同倾角对力学特性的影响,发现节理贯通率在试样强度、变形破坏过程中起主要影响作用。

In order to study the influence of joint inclination and penetration rate on the mechanical properties of rock-like material,by selecting the prefabricated joint rock-like materials as the research object,a series of uniaxial compression tests on two sets of mortar samples considering different joint inclined angles and penetration rates were conducted.The results show that when the joint inclination angle is0°,the peak strength,peak strain and elastic modulus of the specimens decrease with the increase of the joint penetration rate and the specimens with different penetration rates all show the overall tensile failure.When the joint penetration rate is the same,with the increase of the joint inclination angle,the peak strength of the sample shows a V-shaped change trend.The peak strain of the sample first decreases,then increases and then decreases,while the elastic modulus first increases,then decreases and then increases.The two deformation properties show a good corresponding relationship.Furthermore,the results show that the joint penetration rate plays a major role in the strength,deformationand failure of the specimen compared with the joint inclination angle.