【摘要】 为研究锚杆工作荷载,应用了分形理论中的盒维数方法。根据一维杆波动理论,在锚杆外露端头安装一个自激式加速度传感器,利用锚杆无损检测加载试验台分级加载、检测标定测得锚杆-围岩相互作用体系在激发荷载作用下的速度响应,计算其加速度响应曲线的盒维数,拟合得出荷载-盒维数曲线,直观地判断锚杆工作荷载和锚固质量。更多还原

【Abstract】 Box dimension method in fractal theory was used to study the working load of bolts.According to the wave theory of one dimensional bar,a self oscillating acceleration sensor was mounted on the exposed end of the bolt.Nondestructive testing of the bolt,step loading of test beds,and calibration were used to measure speed response of interaction system of bolt-surrounding rock under excitation loads,to calculate the box dimension of acceleration response curve.By the fitted curve of load-box dimensions,anchor bolt working load and anchor quality could be visually determined.更多还原