Integrity monitoring of cast in-situ piles using thermal approach: A field case study
Author | Sun, Qianchen |
Author | Elshafie, Mohammed Z.E.B. |
Author | Barker, Chris |
Author | Fisher, Anthony |
Author | Schooling, Jennifer |
Author | Rui, Yi |
Available date | 2024-08-05T07:19:20Z |
Publication Date | 2022 |
Publication Name | Engineering Structures |
Resource | Scopus |
ISSN | 1410296 |
Abstract | A review of the literature shows that pile integrity is a significant concern in pile construction; in particular, determining the location and nature of anomalies along the depth of the piles using thermal integrity testing data. This paper proposes a new anomaly detection approach which combines early-age temperature monitoring data and finite element back-analyses. A case study on a continuous flight auger (CFA) test pile with engineered inclusions was conducted using this new approach. Through 1D finite element analysis, a linear relationship between maximum temperature and effective pile radius is established. A crucial indicator- 'the effective pile radius' could be used to reconstruct as-built pile 3D shape and identify anomalous regions inside or outside the pile reinforcement cage. The data interpretation results of the field case study show that thermal integrity testing provides reliable information to identify anomalous regions within the pile. Compared to the conventional cross-hole sonic logging, thermal integrity testing used in combination with the new approach presented in this paper, can provide more reliable information in the pile integrity assessment process. |
Sponsor | The authors would like to acknowledge the support from Ove Arup & Partners Ltd and Cementation Skanska Ltd. The research has received support from the grant EP/N021614/1 (CSIC Innovation and Knowledge Centre Phase 2), Innovate UK grant 920035 (Centre for Smart Infrastructure and Construction), and the Construction Innovation Hub grant RG96631 (Centre for Digital Built Britain, University of Cambridge). This work is also performed in the framework of ITN-FINESSE, funded by the European Union's Horizon 2020 research and innovation program under the Marie Skłodowska-Curie Action grant agreement n° 722509. This research has received support from the Centre for Digital Built Britain’s (CDBB) at the University of Cambridge which is within the Construction Innovation Hub and is funded by UK Research and Innovation through the Industrial Strategy Fund. |
Language | en |
Publisher | Elsevier |
Subject | Cast in-situ pile Finite element modelling Non-destructive test Pile anomaly detection Structural health monitoring Thermal integrity test |
Type | Article |
Volume Number | 272 |
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Civil & Architectural Engineering [769 items ]