Effects of the Source on Wave Propagation in Pile Integrity Testing

2010 ◽  
Vol 136 (9) ◽  
pp. 1200-1208 ◽  
Author(s):  
Hua-You Chai ◽  
Kok-Kwang Phoon ◽  
Dian-Ji Zhang
Keyword(s):  
Wave Propagation ◽  
Integrity Testing ◽  
Pile Integrity

scholarly journals Sonic Logging Vs PIT untuk Mendeteksi Integritas Pondasi Tiang

2011 ◽  
Vol 2 (2) ◽  
pp. 1031
Author(s):  
Gouw Tjie Liong
Keyword(s):  
Basic Theory ◽  
Load Testing ◽  
Destructive Testing ◽  
Pile Capacity ◽  
Advantages And Disadvantages ◽  
Integrity Testing ◽  
First Category ◽  
Sonic Logging ◽  
Second Category ◽  
Pile Integrity

Non destructive testing on piles can be divided into two main categories. The first category is to find out the integrity of the piles, such as pile integrity testing (PIT) and sonic logging. The second category is to find out the pile capacity, such as dynamic load testing/pile driving analysis. Since the early 1990s, the application of the tests was brought into practice and gained its popularity in Indonesia. However, the basic theory behind the testing has not been widely disseminated. This study tries to elaborate the first category of the testing, i.e. the pile integrity testing and sonic logging. The basic theory, the advantages and disadvantages, the application, the limitation and the interpretation of those techniques shall be discussed. Comparison on case studies of those testing methods also shall be given. 

Numerical Simulation of Ultrasonic Pile Integrity Testing

2020 ◽  
Vol 56 (1) ◽  
pp. 1-11
Author(s):  
I. N. Lozovsky ◽  
R. A. Zhostkov ◽  
A. A. Churkin
Keyword(s):  
Numerical Simulation ◽  
Integrity Testing ◽  
Pile Integrity

Time–Frequency Signal Analysis for Nondestructive Evaluation of Pile with Cap

2008 ◽  
Vol 47-50 ◽  
pp. 9-12
Author(s):  
Kuo Feng Lo ◽  
Sheng Huoo Ni ◽  
Jenq Jy Charng ◽  
Yan Hong Huang
Keyword(s):  
Time Domain ◽  
Signal Analysis ◽  
Time History ◽  
Frequency Signal ◽  
Time Frequency ◽  
Integrity Testing ◽  
Testing Signal ◽  
Pass Through ◽  
As Stress ◽  
Pile Integrity

As stress waves decay as they pass through the pile foundation system, it is extremely challenging for all nondestructive testing methods to evaluate the pile integrity of a shaft underneath a structure. In this study, time–frequency signal analysis (TFSA) is used for signal processing and adopted to interpret the pile integrity testing signal. An experimental case with pile lengths of 58m with caps, were tested by the low strain sonic echo method. Traditional time domain analyses can not identify the pile tip response signals 58m lengths. After time-history curves are transformed into a time–frequency domain distribution, the results indicate the pile tip can be located more easily and clearly than the traditional time-domain analyses of pile integrity testing allowed for.

Three-dimensional effects in low-strain integrity testing of piles: analytical solution

2016 ◽  
Vol 53 (2) ◽  
pp. 225-235 ◽  
Author(s):  
Changjie Zheng ◽  
George P. Kouretzis ◽  
Xuanming Ding ◽  
Hanlong Liu ◽  
Harry G. Poulos
Keyword(s):  
Impact Load ◽  
Three Dimensional ◽  
Three Dimensions ◽  
Integrity Testing ◽  
Integrity Tests ◽  
The One ◽  
Propagation Of Waves ◽  
The Impact ◽  
Pile Integrity ◽  
Elastic Soil

The interpretation of low-strain integrity tests of piles is commonly based on methods developed around the one-dimensional wave propagation theory. In reality, waves resulting from the impact of a hammer on a pile head propagate in three dimensions, and the validity of the plane-front assumption is rather questionable for cases where the size of the hammer is small relative to that of the pile. This paper presents an analytical model of the dynamic response of a pile to an impact load on its head, considering propagation of waves in both vertical and radial directions. The proposed formulation applies to a pile of finite length embedded in multilayered elastic soil, and allows for considering both shape and material pile defects, by reducing locally the radius of the pile cross section or the Young’s modulus of its material. Arithmetic examples are used to depict the effect of high-frequency interferences on the interpretation of pile integrity tests, which can only be accounted for in the three-dimensional formulation of the problem, and lead to practical suggestions for the interpretation of such tests.

scholarly journals Pile integrity testing: Testing and results analysis

2019 ◽  
Vol 62 (3) ◽  
pp. 39-59
Author(s):  
Mladen Ćosić ◽  
Kristina Božić-Tomić ◽  
Nenad Šušić
Keyword(s):  
Integrity Testing ◽  
Pile Integrity

Applying of dynamic acoustic signal attributes for evaluation of the contact between pile and soils

2020 ◽  
pp. 126-137
Author(s):  
V. V. Kapustin ◽  
A. A. Churkin
Keyword(s):  
Data Analysis ◽  
Static Load ◽  
Geophysical Methods ◽  
Additional Information ◽  
Integrity Testing ◽  
Testing Data ◽  
Load Tests ◽  
Dynamic Attributes ◽  
Non Destructive ◽  
Pile Integrity

The low-strain impact method is one of the most commonly used non-destructive geophysical methods in pile integrity testing. Data analysis of the low-strain method in the frequency domain allows the researcher to get additional information about the studied foundation. The authors of the article propose a methodology for assessing the contact of piles with soils based on an analysis of the dynamic attributes of the frequency response. Conclusions drawn from using the above-described method can be used by engineers to study piles quality and to plan direct static load tests to determine the bearing capacity of piles.

Multisignal detecting system of pile integrity testing

2002 ◽  
Author(s):  
Zuting Liu ◽  
Ying Luo ◽  
Shihai Yu
Keyword(s):  
Integrity Testing ◽  
Pile Integrity
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