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| Application Analysis of Tube Wave in the Pile Integrity Testing |
| REN Chun - shan，YANG Huai - yu，WANG Chuang |
| (The Third Railway Survey and Design Institute Group Corporation，Tianjin 300142，China) |
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Abstract Research purposes ： The generation of the tube wave is conditional， with its spreading characteristics of strong energy，slow decay， slow propagation velocity and the feature of solid medium around in spreading. Combined with the propagation of longitudinal waves and the comparative analysis of propagation characteristics of different types of foundation pile integrity，study the feasibility of analyzing and determining the integrity of concrete piles pile by using tube wave analysis，through the analysis of the pipe wave generation conditions and the propagation characteristics in the pipe water.
Research conclusions :(1) It is feasible to determine the quality of concrete pile integrity through analyzing the pile of tube wave propagation characteristics， based on the theory of tube waves. (2) It is regularity spreading of the longitudinal wave and the tube wave in the pipes，with a quite difference of the two waves" spreading characteristics， forming the image features of the phase axis. (3) The tube wave propagation has the physical characteristics of pile concrete，the different tube wave phase axis image map features reflect the structural properties of the concrete pile. (4) The research results can be used in the field of engineering construction pile foundation inspection. And the method provides a new way for pile integrity testing technology.
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Received: 22 July 2015
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2015, Vol. 32 
