砂浆锚杆锚固段的界面力学特性

The interfacial mechanical characteristics in anchorage zone of grouted bolts

以砂浆锚杆发生砂浆体-岩体界面破坏为背景,通过实验室的模型试验来研究砂浆体-混凝土基体的界面力学特性.由试验得到的荷载-滑移曲线分析了界面裂缝开展的过程;借鉴Stang的计算理论,建立了分析模型,计算出界面开裂的表征参数;并且推导出极限荷载的计算公式,与试验结果符合良好.

A push-out test was carried out at the lab to study the interracial mechanical characteristics in the case of bond failure happening at the grout-rock interface. Based on the load-slip curves, the propagation of debonding was analyzed and a mathematical model was founded using Stang＇ s theory to calculate the debonding parameters. The maximum load was attained and agreed well with the experimental results.