Rock bolts are widely used in rock engineering projects to improve the shear capacity of the jointed rock mass. The bolt inclination angle with respect to the shear plane has a remarkable influence on the bolting performance. In this study, a new artificial molding method based on 3D scanning and printing technology was first proposed to prepare bolted joints with an inclined bolt. Then, the effects of the bolt inclination angle and boundary conditions on the shear behavior and failure characteristic of bolted joints were addressed by conducting direct shear tests under both CNL and CNS conditions. Results indicated that rock bolt could significantly improve the shear behavior of rock joints, especially in the post-yield deformation region. With the increase of bolt inclination angle, both the maximum shear stress and the maximum friction coefficient increased first and then decreased, while the maximum normal displacement decreased monotonously. Compared with CNL conditions, the maximum shear stress was larger, whereas the maximum normal displacement and friction coefficient were smaller under the CNS conditions. Furthermore, more asperity damage was observed under the CNS conditions due to the increased normal stress on the shear plane.

锚杆广泛用于岩石工程项目中，以提高节理岩体的抗剪能力。螺栓相对于剪切面的倾斜角度对螺栓连接性能有显着影响。在这项研究中，首先提出了一种基于3D扫描和打印技术的新型人工成型方法，以制备带有倾斜螺栓的螺栓连接。然后，通过在CNL和CNS条件下进行直接剪切试验，研究了螺栓倾斜角度和边界条件对螺栓连接的剪切行为和破坏特性的影响。结果表明，锚杆可以显着改善节理的剪切性能，特别是在屈服后变形区域。随着螺栓倾斜角度的增加，最大剪应力和最大摩擦系数均先增大后减小，而最大法向位移单调减小。与CNL条件相比，在CNS条件下，最大剪切应力较大，而最大法向位移和摩擦系数较小。此外，由于剪切面上的法向应力增加，在CNS条件下观察到了更多的粗糙损伤。