Three year's operation has proved that this system is an advanced testing system for prestressed anchor ropes.
三年来的运行实践考核证明该系统是较先进的锚索预应力自动测试系统。
2
At present, ultrasonic non-destructive testing is usually used in health detection of anchor screws, and it mainly used in detecting inner defect of anchor screws under long term service.
The testing methods on extension of anchor bolt are introduced. The whole deformations of normal bolts under pretensioning and its effect on the jacking of surrounding rock are pointed out.