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《Chinese Journal of Underground Space and Engineering》 2013-05
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Detecting the Default in Covered Structure by CT Method

Huang Yonglin;Xu Hangang;Jiang Xin;Earthquake Engineering Institute of Jiangsu Province;  
CT is the abbreviation for Computer Tomography and is a rapid developing modern non-destructive detecting technology.Because of high resolution,CT can accurately reflect the detail of detected object,so it can be used in fine accurate detection of defects in hidden engineering structure.The theory frame and main technical points for applying this technology to the underground concealed work detection are illustrated by ultrasonic CT technology as an example.Two cases are stated in this paper.They are: checking distribution of post grouting at bottom of long piles by ultrasonic CT,and checking the quality of piles by joint application of ultrasonic CT and electromagnetic CT.These two cases are from the super-large pile group foundation of Yangtze River Bridge and a cross-sea bridge and are the first example in world to check grouting effect for pile foundation and pile quality of piles at 120m underground.
【CateGory Index】: TP391.41;TU195
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