围岩性质对树脂锚杆锚固性能影响的研究

Study on Influence of Property of Surrounding Rock on Anchorage Property of Resin Anchored Bolt

运用数值模拟方法分析了树脂锚固剂锚固界面上剪应力大小在不同性质围岩情况下的分布规律,指出对于不同性质的围岩,锚杆拉拔载荷对锚杆锚固性能影响较大,锚杆锚固长度与锚固剂厚度对锚杆锚固性能影响较小,同时在载荷保持不变的情况下,锚杆与树脂锚固剂界面处的剪应力峰值随着围岩弹性模量的增加而增加,剪应力峰值越大,岩体越容易屈服。

The numerical simulation method is used to analyze the distribution of shear stress on the anchorage interface of resin anchorage under the conditions of different properties of surrounding rock. It is pointed out that for different properties of surrounding rock, anchor pulling load has great influence on anchorage performance of anchor rod, and anchorage length and anchorage agent thickness have little effect on anchorage performance of anchor rod. Moreover, when the load remains constant, the greater the elastic modulus of the surrounding rock is, the greater the peak shear stress at the interface between the anchor and resin anchorage, the easier the rock mass will yield.