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本文应用模拟方法研究非预应力砂浆锚杆的支护机理,研究了岩石和锚杆组合材料在单轴和三轴压缩情形下的变形特性和强度特性。试验结果表明:锚杆影响区域内围岩具有正交异性特性。在锚杆沿着试件的轴线方向时,围岩的弹性模量随着锚杆含钢率的增加而增大,围岩强度的提高主要是内摩擦角φ值增加,而此时粘结力C几乎没有变化。
In this paper, the supporting mechanism of non-prestressed mortar anchors was studied by using the simulation method, and the deformation characteristics and strength characteristics of rock and anchor composites under uniaxial and triaxial compression were studied. The test results show that the surrounding rock in the area affected by anchor bolts has orthotropic characteristics. When the anchor rod is along the axial direction of the test piece, the elastic modulus of the surrounding rock increases with the increase of the steel content of the anchor rod, and the increase of the surrounding rock strength is mainly due to the increase in the value of the internal friction angle φ, and the bond at this time Force C hardly changed.