Acoustic Emission Sensing of Pipe–Soil Interaction: Full-Scale Pipelines Subjected to Differential Ground Movements

Smith, Alister; Moore, Ian D.; Dixon, Neil

doi:10.1061/(asce)gt.1943-5606.0002185

Cited by 23 publications

(8 citation statements)

References 30 publications

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“…The current investigation is only to establish some relationships that can help real-time monitoring and damage detection for largescale underground structures. An increase in dimensions of utility tunnel is expected to increase the magnitude of AE signals, since macro-cracks can propagate to a much larger scale, showing more released energy [38,41].…”

Section: Instrumentationmentioning

confidence: 99%

“…The dynamic change of b-value in acoustic emission analysis has some specific physical significance: (1) the increase of b-value means that the proportion of small-scale AE events increases, and the micro-fracture inside the material is in a stable and expanding state; (2) the decrease of b-value means that the proportion of large-scale AE events increases, and the internal micro-cracks of the material are mainly caused by large-scale failure; (3) the b-value fluctuates within a small range, indicating that the failure state of micro-cracks inside the material is relatively slow; (4) the constant value of b-value indicates that micro-fractures at different scales are relatively stable; (5) a sudden transition of b-value in a large range means an improvement of microcrack state, which represents a burst instability expansion [38,46].…”

Section: Characteristics Of B-valuementioning

confidence: 99%

“…For instance, the b-value can be characterized to establish the relationship between the occurrence of AE events and the damage intensity. Different analysis schemes for AE signals are more suitable to analyze model-scale specimens, but the ease of time series analysis can provide reliable estimation of damage process for health monitoring of an underground structure in the field condition [37][38][39].…”

Section: Introductionmentioning

confidence: 99%

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Time Series Analysis of Acoustic Emissions in Prefabricated Utility Tunnel During the Sealing Test

Lin

Deng

et al. 2020

Int. J. of Geosynth. and Ground Eng.

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Utility tunnel is increasingly applied for underground space development, and its health monitoring becomes attractively important. The acoustic emission (AE) technology is often used for damage monitoring of small-scale specimens made of concrete or rock in the laboratory. In this study, the AE technology is adopted to instrument a novel prefabricated utility tunnel to provide insights into the leakage behavior of the structure during the sealing test. Filtering is conducted on AE data to eliminate the influence of noise interference, especially for data in the pressurization stage. The traditional ring-down count and AE energy are determined from eigenvalue analysis of AE events. It is found that these conventional calculations can be well related to the pattern of internal water pressure, and the Felicity effect is found in the loading process. Furthermore, time series analysis is carried out for each specific pressurization or pressure-holding stage during the sealing test, in which the b-value (an important mean to study the characteristics of AE signal) is evaluated. Results show that the b-value can also be used as a prediction basis for pre-alarming monitoring before the occurrence of seepage failure for utility tunnel.

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Section: Instrumentationmentioning

confidence: 99%

Section: Characteristics Of B-valuementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Time Series Analysis of Acoustic Emissions in Prefabricated Utility Tunnel During the Sealing Test

Lin

Deng

et al. 2020

Int. J. of Geosynth. and Ground Eng.

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“…Acoustic emission (AE) technology has become an acceptable approach for landslide monitoring [ 23 , 24 , 25 , 26 , 27 , 28 ]. When particulate materials deform, part of the released energy is converted to sound and AE refers to the high frequency proportion of the sound energy [ 29 , 30 ]. AE technology has the characteristics of high temporal resolution, strain sensitivity, and lower costs.…”

Section: Introductionmentioning

confidence: 99%

Correlation between Acoustic Emission Behaviour and Dynamics Model during Three-Stage Deformation Process of Soil Landslide

Deng

Yuan

Chen

et al. 2021

Sensors

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Acoustic emission (AE) monitoring has become an optional technology to quantify slope deformation. However, there are still challenges in developing generic AE interpretation strategies. Dynamics and kinematics models are two physical methods for analysing slope stability, which appear to improve the interpretability of AE monitoring data. The aim of this study is to explore the change patterns and interrelations of dynamics, kinematics, and AE measurements using a model test and physical analysis, to further understand the development process of a progressive landslide. A model test is designed based on the kinematics model of landslide three-stage deformation. An equation between factor of safety (FoS) and thrust is proposed based on the mechanical model of a landslide test. There is a clear correspondence between the displacement and inverse velocity during the deformation-controlled process. Relationships are uncovered between the thrust and FoS as well as the thrust and acceleration. As a characteristic parameter of AE, ring down count (RDC) is able to quantify the deformation process of the soil slope. Moreover, acceleration and RDC can reflect the sudden change of the slope state and, hence, can be effective indicators for the early warning in a progressive landslide.

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“…Non-extended statistical modeling of electrical emissions were used to predict the fracture of mortar beams by Stergiopoulos et al [19]. In addition, as a new non-destructive testing method, AE has been widely used for the damage monitoring of various materials [20] such as marble [21], joint specimens [22], buried pipe deformation [23], and polymer structure [24]. Zhou et al [25] proposed a method to reconstruct the denudation of sedimentary basin by using AE, a technique which is also effective in monitoring the tensile failure mechanism of carbon fiber woven composites [26].…”

Section: Introductionmentioning

confidence: 99%

Bending Resistance and Failure Type Evaluation of Basalt Fiber RPC Beam Affected by Notch and Interfacial Damage Using Acoustic Emission

et al. 2020

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Generally, reactive powder concrete (RPC) contains steel fibers often exposed to aggressive environments. Steel fibers in such RPCs are subjected to corrosion in-service, which can significantly change the mechanical properties of the structural components. In this paper, basalt fibers were used to replace steel fibers for preparing a new basalt fiber modified reactive powder concrete (BFRPC). The bending resistance of BFRPC beams was studied, and the crack propagation and failure type of BFRPC beam were monitored by acoustic emission (AE). During the bending test, the failure type of BFRPC was evaluated by AE. Besides, the effects of notch and interfacial damage on the bending resistance and failure type were also studied. During the test, ordinary Reactive Powder Concrete (RPC) without basalt fibers was used as a reference. Results revealed that failure type of the RPC beam and BFRPC beam was mainly caused by shear failure. The notch increased the number of tensile cracks in the beam failure crack, resulting in a decrease in the bending resistance of RPC beam and BFRPC beam. Besides, basalt fiber could improve the toughness and bending resistance of BFRPC beam and increase resistance of the BFRPC beam to notch and interface damage.

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Acoustic Emission Sensing of Pipe–Soil Interaction: Full-Scale Pipelines Subjected to Differential Ground Movements

Abstract: Smith et al.

Cited by 23 publications

References 30 publications

Time Series Analysis of Acoustic Emissions in Prefabricated Utility Tunnel During the Sealing Test

Time Series Analysis of Acoustic Emissions in Prefabricated Utility Tunnel During the Sealing Test

Correlation between Acoustic Emission Behaviour and Dynamics Model during Three-Stage Deformation Process of Soil Landslide

Bending Resistance and Failure Type Evaluation of Basalt Fiber RPC Beam Affected by Notch and Interfacial Damage Using Acoustic Emission

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