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通过对层状岩石边坡锚注加固模拟剪切试验的研究,对比分析各种结构节理剪切力—剪切位移全程曲线的特点;阐述节理剪切破坏各个阶段的细观过程及不同节理的抗剪切强度和抗剪切刚度的特征。研究表明:锚注加固节理面抗剪切强度并不等于锚杆和胶结面抗剪切强度之和,其强度同步发挥的程度与锚杆钢筋的取材及钢筋配筋率有关;边坡锚注加固后,节理由原来的摩擦型节理和加锚柔性节理变为锚注刚性节理,由于节理的变形减小,可以有效地控制边坡的位移量;锚注节理的抗剪切强度随锚杆与节理面夹角的增大而减小,两者呈反比关系;当剪切力方向与锚杆倾向相同且在锚杆与锚注节理面夹角从90°到30°的变化过程中,锚注节理的抗剪切强度逐渐增大,表现为节理面的C值和φ值逐渐增大。
Through the research on the analog shear test of anchoring and reinforcement of stratified rock slope, the characteristics of the whole curve of shear-shear displacement of various structures are compared and analyzed. The mesoscopic process and the different joints of different joints Shear strength and shear stiffness characteristics. The results show that the shear strength of the joints strengthened by the anchor injection is not equal to the sum of the shear strength of the anchor and the cemented surface. The degree of synchronization of the strength of the anchor and the cemented surface is related to the material of the steel bar and the steel reinforcement ratio. After reinforcement, the jointed joints are changed from the original frictional joints and the anchored joints to rigid joints. Because the joint deformation decreases, the displacement of the slope can be effectively controlled. The shear strength of the joints with anchors When the angle between shear stress and anchor is the same and the included angle between bolt and anchor joint surface changes from 90 ° to 30 °, The shear strength of the anchor injection joints gradually increases, showing that the C value and φ value of the joint surface gradually increase.