高地应力隧道阻尼锚杆抗冲击性能研究

Performance Research of Damping Bolt for Impact Resistancein High Stress Tunnel

为探讨冲击载荷作用下阻尼锚杆的耗能机理,开展了阻尼锚杆和普通锚杆的冲击试验,从锚杆变形与能量耗散等方面,分析了冲击地压发生时锚杆的动力响应特征,结果表明,在相同冲击能量下,阻尼锚杆轴力峰值远小于普通锚杆,且具有更好的延性特征及动载适应性,阻尼锚杆耗能效果明显。

In order to study the energy dissipation mechanism of damping bolt under impact load,the impact tests of damping bolt and ordinary bolt were carried out.The dynamic response characteristics of bolt under impact ground pressure were analyzed from the aspects of deformation and energy dissipation of bolt.The results show that under the same impact energy,the peak value of axial force of damping bolt is far less than that of the common bolt,and it has better ductility characteristics and dynamic load adaptability.The damping bolt has obvious energy dissipation effect.