Theoretical Analysis of Non-Destructive Integrity Test in the Pile with Cap Based on Low Strain Reflected Wave Method

2013 ◽  
Vol 427-429 ◽  
pp. 1447-1451
Author(s):  
Pei Ge Liu ◽  
Ran Zhao ◽  
Zong Quan Ying ◽  
Lin Wang Su
Keyword(s):  
Theoretical Analysis ◽  
Stress Wave ◽  
Field Testing ◽  
Wave Method ◽  
Propagation Characteristics ◽  
Integrity Test ◽  
Time Curve ◽  
Reflected Wave ◽  
Non Destructive ◽  
Test Result

This paper analyzes the propagation characteristics of stress wave in the cap-pile system. Based on reflected wave method, the propagation velocity-time curve of stress wave in the defective pile with cap is calculated theoretically. Then the calculation result shows that the waveform curve by theoretical analysis is consistent with the defect location and pile position, and the waveform curve well reflects the propagation characteristics of waves in the pipe with cap. Finally the theoretical analysis method is used to assist the field testing, and compared with the test result to describe the integrity status of pile.

Reliability study on the application of reflected wave method in integrity test of pre-stressed pipe pile

2018 ◽  
Vol 18 (3) ◽  
pp. 411-422
Author(s):  
Zhonghuan HUANG ◽  
Zigiang ZHU ◽  
Jianzhong LI ◽  
Guangyin LIU
Keyword(s):  
Wave Method ◽  
Integrity Test ◽  
Reliability Study ◽  
Pipe Pile ◽  
Reflected Wave

Non-Destructive Pile Integrity Test Using HWAW Method

2006 ◽  
Vol 321-323 ◽  
pp. 363-366 ◽  
Author(s):  
Hyung Choon Park ◽  
Dong Soo Kim
Keyword(s):  
Numerical Simulation ◽  
Wave Method ◽  
Integrity Test ◽  
Simulation Test ◽  
Model Pile ◽  
Harmonic Wavelet ◽  
Good Potential ◽  
Non Destructive ◽  
Pile Length ◽  
Pile Integrity

The evaluation of soundness of pile is very important for safety of super structure. In this paper, the HWAW(Harmonic Wavelet Analysis of Wave) method is modified and applied to evaluate soundness of pile non-destructively. The proposed method can evaluate pile integrity such as pile length, material quality represented by wave velocity and pile end condition which are very important factors for pile behavior. To verify the applicability of proposed method, the numerical simulation test using ABAQUS was performed. A model pile was made and the proposed method was applied to evaluate soundness of model pile. Through numerical simulation and model tests, it is shown that the HWAW method has good potential of applying in the evaluation of pile integrity.

scholarly journals Quantitative Analysis of Low-strain Characteristics on Defective Piles with Constriction or Segregation

2015 ◽  
Vol 9 (1) ◽  
pp. 1-6
Author(s):  
Zegen Wang ◽  
Lin Chen ◽  
Zuocheng Xiao
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Quantitative Analysis ◽  
Wave Method ◽  
Time Curve ◽  
Reflected Wave ◽  
Integrity Testing ◽  
Practical Engineering ◽  
Pile Integrity ◽  
Element Method

As one of the most commonly used dynamic pile test technologies, low-strain reflected wave method is increasingly used in pile integrity testing. Currently, field test is only operated in the simple discriminant of defect, but is lack of the comprehension of stress reflection law of different degree defects, especially of the quantitative analysis of defect. To solve the problem, differences between reflected wave of different defective piles are compared, situations with different segregation degrees are simulated with finite element method. The degree of pile concrete segregation was quantificational analyzed in accordance with the theory that velocity-time curve is consistent, which combines the defect characteristics of the ratio between reflected wave peak and incident wave peak ,and the concrete modulus between segregation section and the normal. The construction of finite element method will be significant guidance for practical engineering.

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