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

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.

Analytical solution for distributed torsional low strain integrity test for pipe pile

2021 ◽  
Author(s):  
Yunpeng Zhang ◽  
Guosheng Jiang ◽  
Wenbing Wu ◽  
M. Hesham El Naggar ◽  
Hao Liu ◽  
...  
Keyword(s):  
Analytical Solution ◽  
Integrity Test ◽  
Pipe Pile

Multiple Source-Detector Reflected Wave Method in the Intercity High-Speed Rail Tunnel Application

2012 ◽  
Vol 170-173 ◽  
pp. 1569-1574
Author(s):  
Xiang Hong Liu ◽  
Ping Song Zhang ◽  
Lin Hua Sun ◽  
Song Chen
Keyword(s):  
High Speed ◽  
Geological Structure ◽  
Multiple Source ◽  
Observation System ◽  
Wave Method ◽  
Tunnel Face ◽  
High Speed Rail ◽  
Reflected Wave ◽  
Geological Conditions ◽  
Fault Belt

In the tunnel excavation process, often encounter fault belt, soft interlayer and abnormal water-bearing body does not directly predict adverse geological structure, not timely prediction and control these geological disasters will affect the safety of production. In many prediction methods in geophysical technology with nondestructive, accurate, efficient, fast and be recognized, many shot-geophone reflected wave method in different geological conditions on the apparent impedance response, the migrated results can accurately distinguish the lithologic interface, in many projects has been confirmed. The paper introduces the multiple source-detector reflection wave observation system based on, combined with the specific project example, elaborated how the shot-receiver reflected wave method in tunnel face geological disaster prediction in rats.

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.

scholarly journals Effect of radial homogeneity on low-strain integrity detection of a pipe pile in a viscoelastic soil layer

2018 ◽  
Vol 14 (10) ◽  
pp. 155014771880645 ◽  
Author(s):  
Chunyi Cui ◽  
Kun Meng ◽  
Zhimeng Liang ◽  
Chengshun Xu ◽  
Gang Yang ◽  
...  
Keyword(s):  
Soil Layer ◽  
Complex Impedance ◽  
Pile Head ◽  
Pipe Pile ◽  
Wave Signal ◽  
Reflected Wave ◽  
Scope Of Application ◽  
Transfer Method ◽  
Construction Operation ◽  
Parametric Analyses

This article proposes a new analytical model for the low-strain integrity detection of a pipe pile embedded in a viscoelastic soil layer with radial inhomogeneity by extending Novak’s plane-strain model and transfer method of complex stiffness to consider viscous-type damping. The analytical solutions for the complex impedance, the velocity admittance and the reflected wave signal of velocity at the pile head are also derived. Extensive parametric analyses are further conducted to investigate the effects of the disturbance degree and the disturbance range of surrounding soil due to construction operation on the velocity admittance and the reflected wave signal of velocity at the pile head. It is demonstrated that the proposed model and the obtained solutions can provide extensive scope of application, compared with the relevant existing solutions.

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