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Modelling the infiltration behaviour of foam into saturated sand considering capillary resistance for EPB shield tunnelling.

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Title: Modelling the infiltration behaviour of foam into saturated sand considering capillary resistance for EPB shield tunnelling.
Authors: Zheng, Dongzhu1 (AUTHOR), Bezuijen, Adam2 (AUTHOR), Thewes, Markus3 (AUTHOR)
Source: Géotechnique. Nov2024, Vol. 74 Issue 12, p1204-1214. 11p.
Subjects: Earth pressure, Individual differences, Tunnels, Permeability, Sand, Foam
Abstract: With reference to earth pressure balance (EPB) shield tunnelling, the pressure infiltration of foam into saturated sand is investigated through model study. The model accounts for the companion liquid flow during the foam spurt that was experimentally measured in a previous paper. A micro-stability model is established to predict the maximum foam penetration depth that is based on the minimum pressure difference over an individual foam bubble through the pore throats. From tests on three different sands, the micro-stability model compared well with two sands but underestimated the maximum penetration depth for the third. This is attributed to a case where many bubbles are small enough to flow through the larger pore throats unhindered. Further results from numerical simulation are in accordance with the measured discharge behaviour during the foam spurt. The general agreement suggests that the model could explain the foam infiltration behaviour and can be used to describe the foam spurt during foam infiltration that can be expected in EPB shield tunnelling. [ABSTRACT FROM AUTHOR]
Copyright of Géotechnique is the property of Thomas Telford Ltd 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: 180236049
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
Items – Name: Title
  Label: Title
  Group: Ti
  Data: Modelling the infiltration behaviour of foam into saturated sand considering capillary resistance for EPB shield tunnelling.
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Zheng%2C+Dongzhu%22">Zheng, Dongzhu</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Bezuijen%2C+Adam%22">Bezuijen, Adam</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Thewes%2C+Markus%22">Thewes, Markus</searchLink><relatesTo>3</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Géotechnique%22">Géotechnique</searchLink>. Nov2024, Vol. 74 Issue 12, p1204-1214. 11p.
– Name: Subject
  Label: Subjects
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  Data: <searchLink fieldCode="DE" term="%22Earth+pressure%22">Earth pressure</searchLink><br /><searchLink fieldCode="DE" term="%22Individual+differences%22">Individual differences</searchLink><br /><searchLink fieldCode="DE" term="%22Tunnels%22">Tunnels</searchLink><br /><searchLink fieldCode="DE" term="%22Permeability%22">Permeability</searchLink><br /><searchLink fieldCode="DE" term="%22Sand%22">Sand</searchLink><br /><searchLink fieldCode="DE" term="%22Foam%22">Foam</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: With reference to earth pressure balance (EPB) shield tunnelling, the pressure infiltration of foam into saturated sand is investigated through model study. The model accounts for the companion liquid flow during the foam spurt that was experimentally measured in a previous paper. A micro-stability model is established to predict the maximum foam penetration depth that is based on the minimum pressure difference over an individual foam bubble through the pore throats. From tests on three different sands, the micro-stability model compared well with two sands but underestimated the maximum penetration depth for the third. This is attributed to a case where many bubbles are small enough to flow through the larger pore throats unhindered. Further results from numerical simulation are in accordance with the measured discharge behaviour during the foam spurt. The general agreement suggests that the model could explain the foam infiltration behaviour and can be used to describe the foam spurt during foam infiltration that can be expected in EPB shield tunnelling. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Géotechnique is the property of Thomas Telford Ltd 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: 10.1680/jgeot.21.00146
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 11
        StartPage: 1204
    Subjects:
      – SubjectFull: Earth pressure
        Type: general
      – SubjectFull: Individual differences
        Type: general
      – SubjectFull: Tunnels
        Type: general
      – SubjectFull: Permeability
        Type: general
      – SubjectFull: Sand
        Type: general
      – SubjectFull: Foam
        Type: general
    Titles:
      – TitleFull: Modelling the infiltration behaviour of foam into saturated sand considering capillary resistance for EPB shield tunnelling.
        Type: main
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          Name:
            NameFull: Zheng, Dongzhu
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            NameFull: Bezuijen, Adam
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            NameFull: Thewes, Markus
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            – D: 01
              M: 11
              Text: Nov2024
              Type: published
              Y: 2024
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              Value: 74
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              Value: 12
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