Testing Technology for Grouted Density and Empty Hole of Prestressed Corrugated Pipe Based on Ultrasonic Wave

A method to explore detecting function for grouted density and empty hole of corrugated pipe is proposed in the paper. Firstly, the grouted corrugated pipes and concrete(avoiding corrugated pipes) were detected by using elastic wave to judge defective corrugated pipes through comparative analysis of the data. Secondly, the defective corrugated pipes were detected using ultrasonic wave to determine the specific location and size of defect in corrugated pipes by the analysis of the test data. Finally, the above-mentioned results were verified by actual experiment. The result shows that judged location and size of the empty hole are consistent with the actual situation. So it is feasible to detect grouted density and empty hole of pre-stressed corrugated pipe with the method. The presented method provides theoretical guidance for grouted detection of corrugated pipe.