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A fiber-optic detection method for sediment thickness at the bottom of grouted pile holes.

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Title: A fiber-optic detection method for sediment thickness at the bottom of grouted pile holes.
Authors: Song, Xiaojin1 (AUTHOR) 13819702066@163.com, Wu, Shan1 (AUTHOR) wus@hfut.edu.cn, Han, Heming1 (AUTHOR) hanheming@smail.nju.edu.cn, Zha, Fusheng1 (AUTHOR) geozha@hfut.edu.cn, Wang, Qiao1 (AUTHOR) qiaowang@hfut.edu.cn, Yu, Liangchen1 (AUTHOR) ylc1203@126.com
Source: Measurement (02632241). Feb2026, Vol. 260, pN.PAG-N.PAG. 1p.
Subjects: Fiber optics, Sediment analysis, Building design & construction, Optical fiber detectors, Detection algorithms, Bearing capacity (Bridges), Boreholes
Geographic Terms: Chongqing (China), China
Abstract: • A fiber-optic settling detection sensor based on FBG was proposed. • The FGB-based sensor was applied to a test site in Chongqing. • The detection error of sediment thickness is 0.17%. Sediment at the bottom of a borehole during grouted pile construction is one of the main factors affecting the bearing capacity of pile foundations. Accurate detection of sediment thickness is particularly important for evaluating pile bearing capacity. However, existing methods of sediment monitoring have a low detection accuracy, and efficient and accurate slag thickness detection techniques are lacking. To address these issues, this study proposes a fiber-optic settling detection sensor based on fiber Bragg grating (FBG: stands for Fiber Bragg Grating, which is a grating with a spatially periodic phase distribution formed within the fiber core.) sensing technology. The sudden change in the end resistance of the fiber-optic probe as it passes through a sediment layer creates a time difference, and fiber-optic displacement meters are used to determine the difference between the compression displacements during this period, which represents the thickness of the sediment. Indoor calibration and simulation of sediment testing were performed for the proposed fiber-optic settlement detection sensor applied to a test site in Chongqing, China, for sediment thickness detection. The results show that the fiber-optic sensor accurately discriminated between the sediment, silt, and holding layers. The sensor achieved accurate detection of sediment thickness with the maximum detection error is 0.17%, and good stability of the detection data. The fiber-optic detection method overcomes the error problem of the traditional manual detection method and provides a new method for the accurate inspection of sediment thickness. [ABSTRACT FROM AUTHOR]
Copyright of Measurement (02632241) is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 190300105
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Label: Title
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  Data: A fiber-optic detection method for sediment thickness at the bottom of grouted pile holes.
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  Data: <searchLink fieldCode="AR" term="%22Song%2C+Xiaojin%22">Song, Xiaojin</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> 13819702066@163.com</i><br /><searchLink fieldCode="AR" term="%22Wu%2C+Shan%22">Wu, Shan</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> wus@hfut.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Han%2C+Heming%22">Han, Heming</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> hanheming@smail.nju.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Zha%2C+Fusheng%22">Zha, Fusheng</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> geozha@hfut.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Wang%2C+Qiao%22">Wang, Qiao</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> qiaowang@hfut.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Yu%2C+Liangchen%22">Yu, Liangchen</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> ylc1203@126.com</i>
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  Data: <searchLink fieldCode="JN" term="%22Measurement+%2802632241%29%22">Measurement (02632241)</searchLink>. Feb2026, Vol. 260, pN.PAG-N.PAG. 1p.
– Name: Subject
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  Data: <searchLink fieldCode="DE" term="%22Fiber+optics%22">Fiber optics</searchLink><br /><searchLink fieldCode="DE" term="%22Sediment+analysis%22">Sediment analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Building+design+%26+construction%22">Building design & construction</searchLink><br /><searchLink fieldCode="DE" term="%22Optical+fiber+detectors%22">Optical fiber detectors</searchLink><br /><searchLink fieldCode="DE" term="%22Detection+algorithms%22">Detection algorithms</searchLink><br /><searchLink fieldCode="DE" term="%22Bearing+capacity+%28Bridges%29%22">Bearing capacity (Bridges)</searchLink><br /><searchLink fieldCode="DE" term="%22Boreholes%22">Boreholes</searchLink>
– Name: SubjectGeographic
  Label: Geographic Terms
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Chongqing+%28China%29%22">Chongqing (China)</searchLink><br /><searchLink fieldCode="DE" term="%22China%22">China</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: • A fiber-optic settling detection sensor based on FBG was proposed. • The FGB-based sensor was applied to a test site in Chongqing. • The detection error of sediment thickness is 0.17%. Sediment at the bottom of a borehole during grouted pile construction is one of the main factors affecting the bearing capacity of pile foundations. Accurate detection of sediment thickness is particularly important for evaluating pile bearing capacity. However, existing methods of sediment monitoring have a low detection accuracy, and efficient and accurate slag thickness detection techniques are lacking. To address these issues, this study proposes a fiber-optic settling detection sensor based on fiber Bragg grating (FBG: stands for Fiber Bragg Grating, which is a grating with a spatially periodic phase distribution formed within the fiber core.) sensing technology. The sudden change in the end resistance of the fiber-optic probe as it passes through a sediment layer creates a time difference, and fiber-optic displacement meters are used to determine the difference between the compression displacements during this period, which represents the thickness of the sediment. Indoor calibration and simulation of sediment testing were performed for the proposed fiber-optic settlement detection sensor applied to a test site in Chongqing, China, for sediment thickness detection. The results show that the fiber-optic sensor accurately discriminated between the sediment, silt, and holding layers. The sensor achieved accurate detection of sediment thickness with the maximum detection error is 0.17%, and good stability of the detection data. The fiber-optic detection method overcomes the error problem of the traditional manual detection method and provides a new method for the accurate inspection of sediment thickness. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Measurement (02632241) is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1016/j.measurement.2025.119796
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 1
        StartPage: N.PAG
    Subjects:
      – SubjectFull: Fiber optics
        Type: general
      – SubjectFull: Sediment analysis
        Type: general
      – SubjectFull: Building design & construction
        Type: general
      – SubjectFull: Optical fiber detectors
        Type: general
      – SubjectFull: Detection algorithms
        Type: general
      – SubjectFull: Bearing capacity (Bridges)
        Type: general
      – SubjectFull: Boreholes
        Type: general
      – SubjectFull: Chongqing (China)
        Type: general
      – SubjectFull: China
        Type: general
    Titles:
      – TitleFull: A fiber-optic detection method for sediment thickness at the bottom of grouted pile holes.
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            NameFull: Song, Xiaojin
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            NameFull: Wu, Shan
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            NameFull: Han, Heming
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            NameFull: Zha, Fusheng
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            NameFull: Wang, Qiao
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            NameFull: Yu, Liangchen
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            – D: 10
              M: 02
              Text: Feb2026
              Type: published
              Y: 2026
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