摘要
用于锚杆长度检测的主要方法为声波反射法,而该方法测试精度会受到一些外在因素的影响。通过模拟某工程隧道锚杆设计方案,设置不同长度锚杆,采用弹性波无损检测方法,分析锚杆无损检测中的影响因素。结果表明,在锚杆无损检测中,对于锚杆底端反射波的准确识别和有效判定以及激振频率的合理选取及合适的传感器与锚杆杆体间的耦合方式对测试精度有着直接的影响。
At present,the main method used to detect anchor length is acoustic reflection method,and the test accuracy of this method tends to be affected by some external factors. By simulating a tunnel engineering anchor design,setting bolts of different length,the influencing factors of bolt nondestructive testing are analyzed through the NDT methods with elastic waves. The results show that,in the bolt nondestructive testing,the accurate identification and effective judgment of reflected wave at the bottom of bolt,the reasonable selection of excitation frequency,and the suitable coupling way of sensor and anchor rod body have a direct impact on test accuracy.
出处
《四川理工学院学报（自然科学版）》
CAS
2015年第3期71-75,共5页
Journal of Sichuan University of Science & Engineering(Natural Science Edition)
关键词
锚杆长度检测
弹性波无损检测
激振频率
耦合方式
bolt length detection
elastic wave nondestructive testing
excitation frequency
coupling way
