Nondestructive Test And Evaluation Of Anchorage System Quality

Rock bolts now used widely in the world, such as tunneling, mining, high slope and deep foundation excavation etc. It is used in underground structure from intact wall rock, joint rock to coal seam and soil. But construction of rock bolts is a covert project, which not only lies on the effect of traverse stratum and condition but also decided by construct techniques and management level, it is also the case that some potential flaw makes the quality of construction can't reach design requirement and do a lot of damage in project and economy. As a result, we must emphasize detection in anchorage quality to guarantee the safe mass of projects.Nowadays most detection on anchorage quality and stress is stayed in the step of using fluid pressure operated jacks, which needs too much work and time, and of the most important thing is that this method will do a lot of perturbation turbulence on rock mass and weaken the reinforcement action. Therefore, it is an urgent mission to make a research on nondestructive detection in anchorage quality of rock bolts.The paper based on wave theory and according to variable situation on anchoring state, a lot of research is conducted in the theory on anchorage quality of rock bolts and gets some major achievement as follows:(1) Systematic study is conduct on mechanical problems in detection of anchorage system and parameters which effect the anchorage quality was analyzed.(2) According to analyze theory of stress wave, it do research on diffuse regulation of elastic wave, and summarized attenuation and energy distribution rule to provide an important academic gist in detection on anchorage quality.(3) It decomposed the waveform and made the buzz weaken in the wave pattern according to study on wavelet transformation, and compared the reconfiguration wave to evaluate the anchorage quality on rock bolts.(4) It used wavelet to transfer signals of Baise water conservancy according to analyzing the composed wave and spectrum analysis of the original wave. Anchorage quality can be evaluated efficiently. And the consequence of analyse is the same as the practical result, so adopt the wavelet which is mentioned in this paper to evaluate the quality of anchorage is useful and effective.The wavelet analyse used in this paper is also can be used in nondestructive detection at construction of slop engineering and underground engineering, and provide referenced academic evidence for their safety evaluation.