基于钢筋粘结滑移模型的灌浆-锚杆界面力学性能分析

Mechanical properties analysis of grouting-anchor interface based on reinforced bond slippage model

为了研究锚杆-灌浆体系界面应力-应变关系,提高预应力锚杆锚固效应,运用前人提出的钢筋粘结滑移模型来模拟灌浆-锚杆之间力学性能。重点分析了锚杆全长范围内应力状态中的弹性阶段、弹性软化阶段两种应力状态下,锚杆沿杆长分布的轴力-位移关系。最后通过拉拔试验进行验证和校准,得出锚杆与灌浆界面的剪切力呈非线性力学特征,并与理论推导出的锚杆-灌浆界面切应力变化趋势一致,这对于研究锚杆围岩的受力和变形具有参考意义。

In order to study the stress-strain relationship at the interface between anchor and grouting and improve the anchoring effect of prestressed anchor.Reinforcement bonding model was proposed to simulate the mechanical properties between grouting and anchor.The axial force-displacement relationship of the anchor rod along the length of the rod under the two stress states of the elastic stage and elastic softening stage was analyzed emphatically.Finally,the tensile test was used to verify and calibrate that the shear force at the interface between grouting and grouting is non-linear and consistent with the trend of shear stress at the interface between grouting and grouting,which has the great significance for the research on the stress and deformation of rock.