一种新型复合锚固结构抗爆性能的试验研究

Test Study on Blast Resistance of a New Composite Anchorage Structure

对一种新型复合锚固结构的抗爆性能进行了试验研究。这种新型复合锚固结构是"注浆锚杆-构造措施"型,用于地下空间的加固支护。"构造措施"是指在锚杆里端规律设置一段表面经过处理的空孔。试验研究表明:①复合锚固结构洞室的临界破坏荷载显著高于单一锚固结构洞室,其安全性和稳定性更高,其构造措施段具有一定的抗爆吸能作用;②复合锚固结构用于岩石洞室的抗爆加固是完全可行的;③就本次试验条件而言,在累次爆炸加载作用下,单一锚固结构洞室的破坏程度是复合锚固结构洞室的2.5倍;④加固区具有足够的深度、强度、刚度和稳定性是复合锚固结构优化设计实现的前提。

This paper researches the blast resistance performance of a new type of composite anchorage struc ture. This kind of composite anchorage structure consists of grouted bolt and ＇ tectonic measure＇ , and is applied in the reinforcement of underground space. ＇ Tectonic measure＇ indicates a hole section, which is located in the end of bolt, with the processed hole wall. The blast resistance test shows： the critical damage load of composite anchor age structure reinforced cavity is much higher than that of the single anchorage structure reinforced cavity, it has high er security and stability, its tectonic measure has certain explosion resisting and energy absorbing capability; it is entirely feasible for this composite structure to be applied in the reinforcement and explosion resistance of rock cavity ; for this experiment, under the effect of accumulated blast loads, the damage degree of the single anchorage struc ture reinforced cavity is in average 2.5 times of that of the composite anchorage structure reinforced cavity; the precondition of achieving the optimum design of composite anchorage structure is that the reinforced zone must have e nough depth, strength, stiffness and stability.