Comparison and Popularized Application of Ultrasonic Testing Judgment Criteria in China and Abroad

By combining with the application of China ultrasonic testing method and international ultrasonic testing method in checking the bored piles with over-length and large-diameter,through analyzing and comparing China ultrasonic testing criteria and the criteria stipulated in international common cases,the ultrasonic testing judgment criteria is further summarized,which will provide the reference for the popularization of ultrasonic testing technology in the similar projects in future.