考虑孔壁界面剪切滑移锚杆锚固段应力分布

Stress Distribution of Anchorage Section of Prestressed Rock Bolt Consideringthe Shearing slip Effect of Grout-Rock Interface

基于锚固体与孔壁界面的剪切滑移本构模型,采用荷载传递函数法,建立弹塑性理论空间模型,对预应力锚杆锚固段剪应力沿长度方向的分布规律进行理论研究,得到不同位置处的界面剪应力满足不同剪应力分布规律,界面剪应力主要分布在锚固短端部4.5 m左右范围内等结论,为预应力锚杆设计提供了理论依据。

Based on shearing slide constitutive model of the interface between anchorage body and hole wall,with load transmission method,a elastic-plastic space model was set up,and the theoretical study on the distribution law of shearing stress along the length direction of anchor bolt was carried out.It was concluded that the distribution laws the interfacial shearing stress at different location are different,interfacial shearing stress primarily distributes at the about 4.5m long end of anchorage section.It provide a theoretical basis for the design of prestressed rock bolt.