Torsional Low-Strain Test for Nondestructive Integrity Examination of Existing High-Pile Foundation

Zhang, Yunpeng; Naggar, Hesham El; Wu, Wenbing; Wang, Zongqin

doi:10.3390/s22145330

Cited by 7 publications

(2 citation statements)

References 37 publications

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“…Nowadays, the commonly used non-destructive testing methods include the static load method [1], the high strain method [2], the low-strain method [3], and the ultrasonic method [4]. The static load method has a long detection period, insufficient equipment accuracy, and strong subjectivity of personnel; the high-strain method uses heavy hammer excitation but the detection steps are cumbersome, it is easy to damage the top of the pile, the detection cost is high and waveform analysis is unreliable.…”

Section: Introductionmentioning

confidence: 99%

Low-Strain Damage Imaging Detection Experiment for Model Pile Integrity Based on HHT

Jiang,

Wang,

Feng

et al. 2023

SDHM

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With the advancement of computer and mathematical techniques, significant progress has been made in the 3D modeling of foundation piles. Existing methods include the 3D semi-analytical model for non-destructive low-strain integrity assessment of large-diameter thin-walled pipe piles and the 3D soil-pile dynamic interaction model. However, these methods have complex analysis procedures and substantial limitations. This paper introduces an innovative and streamlined 3D imaging technique tailored for the detection of pile damage. The approach harnesses the power of an eight-channel ring array transducer to capture internal reflection signals within foundation piles. The acquired signals are subsequently processed using the Hilbert-Huang Transform (HHT), a robust analytical tool known for its effectiveness in handling non-stationary signals. Through the development of a sophisticated multi-channel ring array imaging algorithm, this technique empowers engineers and researchers to identify various pile defects, including their specific type, precise location, and obtain detailed 3D imaging representations. The findings of this research offer a valuable blend of theoretical insights and practical guidance, significantly advancing the state-of-the-art in the realm of concrete pile integrity inspection. By simplifying and enhancing the assessment process, this innovative approach not only addresses the complexities of existing methods but also contributes to the overall safety and reliability of concrete engineering structures.

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Section: Introductionmentioning

confidence: 99%

Low-Strain Damage Imaging Detection Experiment for Model Pile Integrity Based on HHT

Jiang,

Wang,

Feng

et al. 2023

SDHM

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show abstract

“…In practice, test p-y (resistance-defection) curves are a traditional tool to evaluate pile properties [6]. Low-strain and high-strain integrity tests have been used as traditional methods to evaluate the quality of pile foundations [7][8][9]. Although some progress has been made in recent research, with many factors afecting monitoring tools, the dynamic response of the pile must be determined considering the pile-soil interaction under a horizontal dynamic load to ensure the safety of the structure.…”

Section: Introductionmentioning

confidence: 99%

Monitoring of the Bond State between the Concrete-Filled Steel Tube Pile and Surrounding Soil

Zhu

2023

Shock and Vibration

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The bonding state of the pile-soil interaction is complex. Traditional monitoring methods and tools have not been fully applied to monitor and evaluate it although it affects the lifecycle safety of the pile. In this study, a health monitoring method is proposed to evaluate the bonding state of the pile-soil contact area; it is a transient impact response method based on piezoelectric ceramic sensors to monitor the pile-soil bonding state. During the test, different damage degrees of the pile-soil bonding state were simulated by considering the working conditions of different soil densities and different crack depths as examples. A horizontal transient impact stress was applied to the pile top, and a piezoelectric ceramic sensor embedded in the pile detected the stress wave. As the stress wave response differs in different damage conditions, an energy index was established to quantitatively monitor the degree of damage.

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Identification of bored pile defects utilizing torsional low strain integrity test: Theoretical basis and numerical analysis

Zhang,

Ji,

Zhang

et al. 2024

Journal of Rock Mechanics and Geotechnical Engineering

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Torsional Low-Strain Test for Nondestructive Integrity Examination of Existing High-Pile Foundation

Cited by 7 publications

References 37 publications

Low-Strain Damage Imaging Detection Experiment for Model Pile Integrity Based on HHT

Low-Strain Damage Imaging Detection Experiment for Model Pile Integrity Based on HHT

Monitoring of the Bond State between the Concrete-Filled Steel Tube Pile and Surrounding Soil

Identification of bored pile defects utilizing torsional low strain integrity test: Theoretical basis and numerical analysis

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