Experimental study on nondestructive testing of anchor cable in pumped storage power station

In order to demonstrate the effect of elastic wave reflection method, the nondestructive testing test of anchor cables was carried out at the bank slope of Fukang Pumped Storage Power Station in Xinjiang. On the basis of the basic theory of elastic wave reflection method, the anchor cable sensor is embedded, and the data acquisition, signal excitation position and wave velocity of anchor body in the process of nondestructive testing of anchor cable are systematically studied. The following results are obtained: When the receiving sensor position is fixed and the excitation part is the steel strand where the receiving sensor is installed, the receiving signal amplitude is the largest. When the excitation part is anchor cable tray, the amplitude of the received signal is weakened, but the interference signal is large. The wave velocity of anchor cable decreases with the increase of anchor cable grouting, grouting age and tensile load. According to the experimental test results of anchor cable, the length of anchor cable can be detected and quantitatively analyzed based on elastic wave reflection method. However, at present, elastic wave reflection method can only make qualitative evaluation on grouting tightness of anchor cable anchorage body, which does not reach the accuracy of quantitative evaluation. The experimental results have certain reference and guidance for the peers who study the nondestructive testing technology of anchor cables.