Nondestructive Testing of Deep Foundations

Hertlein, Bernard; Davis, Allen G.

doi:10.1002/0470034831

Cited by 45 publications

(13 citation statements)

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“…The common factor of all the seismic based methods is that they are fast and they have the ability to determine efficiently the localisation of defect in deep foundation. Table 1 summarizes the inherent advantages and limitations of each one of these method [1,[3][4][5][6][7][8].…”

Section: Seismic Methodsmentioning

confidence: 99%

A review of non-destructive methods applied in deep foundations

Allalan,

Bounab,

El Khannoussi

2022

MATEC Web Conf.

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In the field of civil engineering, non-destructive methods occupy an essential place at the heart of each major project or planned civil engineering work. Among the several applications of this technique, one finds the quality control of various elements constituting the structure of the work (concrete, reinforcement, steel ... etc) as well as the recognition of pathologies. Of main interest in this context, non-destructive based methods allow for quality monitoring during construction and inspection of defects during and after the works, especially in inaccessible sites (piles, deep foundations, nuclear sites). Secondly, the preventive and corrective maintenance of old infrastructures can gain in efficiency thanks to the detection of failures and accurate localisation of damaged parts which are provided by this technique. It is in this perspective that the present research project focuses on the detection of failures that occur in deep foundations by means of a non-destructive testing method. A critical analysis is adopted and various methods were explored along with their principle, advantages, limitations and fields of application.

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Section: Seismic Methodsmentioning

confidence: 99%

A review of non-destructive methods applied in deep foundations

Allalan,

Bounab,

El Khannoussi

2022

MATEC Web Conf.

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“…The most commonly used surface reflection tests are the sonic echo (SE) and impulse response (IR) methods 13–15 . For the SE method, the integrity of the tested piles is evaluated by identifying and analyzing the travel time, phase direction, and the amplitude of the reflections measured by the geophone in the time domain.…”

Section: Surface Reflection Methodsmentioning

confidence: 99%

Integrity Evaluation of PCC Piles Using the Surface Reflection Method

Yan

2012

Experimental Techniques

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The surface reflection method was used in this study to evaluate its applicability and limitations in the evaluation of the integrity of pour concrete‐cased (PCC) piles. Parametric studies of the surface reflection technique were carried out numerically and experimentally, and the responses were analyzed both in the time and frequency domains. It was found that the length of the PCC piles can be determined with confidence in both domains. However, detecting the integrity of PCC piles in the time domain seems more appropriate than that in the frequency domain. Also, the relative angle between the impact and receivers should not be larger than 90° to obtain satisfactory accuracy in the determination of the defect depth.

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“…In order to perform the PS test, a borehole close to the tested foundation is drilled in the soil and filled with water to provide good acoustic coupling [3]. The external force is applied at the top or side of the foundation by an impulse hammer and the propagated stress wave is sensed by a hydrophone placed in the borehole at certain depths, as shown in Fig.…”

Section: General Proceduresmentioning

confidence: 99%