Experimental study of high frequency longitudinal guided wave propagation in grouted rock bolt

被引：0
|
作者：
Zhou, Song-Qiang [1 ]
He, Wen [2 ]
Wang, Cheng [1 ]
机构：
[1] State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China
[2] Engineering Institute, Jiangxi University of Science and Technology, Ganzhou, Jiangxi 341000, China
来源：
Beijing Ligong Daxue Xuebao/Transaction of Beijing Institute of Technology | 2011年 / 31卷 / SUPPL.1期
关键词：
Mortar - Rock bolting - Concrete construction - Guided electromagnetic wave propagation - Rock mechanics - Bolts - Foundations - Grouting - Velocity;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The properties of high frequency longitudinal guided wave propagating in a free bolt and grouted rock bolts were studied by experimental methods. Guided waves with frequencies 1~3 MHz were used to inspect rock bolts, and the optimal excitation wave frequencies were obtained. Under the optimal frequencies, the amplitude of bolt end reflected waves has a maximum value, and the propagation velocity of guided waves in the rock bolts reaches a maximum value too. Furthermore, guided wave velocity values in a free bolt are close to that of the embedded section the rock bolt. As a result, the position of flaws on the bolt can be determined by the velocity of the high frequency guided wave in a free bolt and the reflected waves of the flaws.
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页码：121 / 124
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