论文部分内容阅读
通过对压力分散型预应力锚杆锚固段的受力分析,推导出了该类型锚杆的剪应力和轴力分布的解析解。在此基础上,对比了压力分散型锚杆与压力集中型锚杆的受力性能,结果表明,压力分散型锚杆的剪应力和轴力都大幅下降,避免了应力集中。讨论了岩土体的力学参数和预应力对剪应力和轴力的影响,结果表明,岩土体弹性模量和内摩擦角越大,则剪应力峰值越高,轴力衰减越快,且剪应力和轴力分布越集中;预应力越大,则剪应力和轴力越大;黏聚力越大,则剪应力有所增大而轴力有所减小,但影响不大。
Based on the analysis of the stress distribution of the prestressed anchorage section of the pressure-dispersed prestressed anchor, the analytic solution of the shear stress and the axial force distribution of the anchorage section is deduced. On this basis, the stress performance of pressure-dispersion anchor and pressure-concentrated anchor is compared. The results show that the stress and shear stress of the pressure-dispersion anchor decreases sharply, avoiding the stress concentration. The effects of mechanical parameters and prestressing on shear stress and axial force are discussed. The results show that the greater the elastic modulus and internal friction angle of rock and soil, the higher the peak value of shear stress and the faster the attenuation of axial force The more concentrated the shear stress and the axial force distribution. The bigger the prestress, the larger the shear stress and the axial force. The bigger the cohesion, the larger the shear stress and the smaller the axial force, but the less influence.