柱状节理岩体相似材料力学特性试验研究

摘要

Based on the model test of columnar jointed rock mass,the anisotropic characteristics of columnar jointed rock mass are investigated.A new method of simulating the interior joint of rock mass is used to make 3D printing of six prism joints with different inclination angles.The resin is as the joint printing material and the cement mortar is as the model material.The anisotropic properties of the jointed rock mass with the change of the dip angle of 0°-45° are investigated by the uniaxial compression test of the cube specimen.It is shown that the compressive strength of rock mass decreases with the gradual increasing of the angles between the extension direction and the vertical direction of the joint,and the failure mode of the cylinder under uniaxial compression is mainly shear failure.%通过柱状节理岩体模型试验探究白鹤滩水电站坝区柱状节理岩体各向异性特征.使用了模拟岩体内部节理的新方式——3D打印制作不同倾角六棱柱形节理试件,以树脂为节理打印材料,水泥砂浆为模型材料,通过立方体试件单轴压缩试验考察节理岩体强度随倾角0°~45°变化的各向异性特征.试验结果表明:岩体压缩强度随着节理面延伸方向与竖直方向的夹角的逐渐增大而减小,单轴压缩下柱体破坏模式主要为剪切破坏.