Numerical Simulation Study of Shield Tunnel Construction Under Canal in Water‐Rich Sand Layer.
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| Title: | Numerical Simulation Study of Shield Tunnel Construction Under Canal in Water‐Rich Sand Layer. |
|---|---|
| Authors: | Liu, Jianhua1,2 (AUTHOR), Bai, Liliuyang1 (AUTHOR) nicholasvvhite@outlook.com, Chen, Xing3 (AUTHOR), Liu, Ke1 (AUTHOR), Zhou, Lejiang1 (AUTHOR), Ji, Jian (AUTHOR) jian.ji@hhu.edu.cn |
| Source: | Advances in Civil Engineering. 6/30/2026, Vol. 2026, p1-23. 23p. |
| Subjects: | Pore water pressure, Grouting, Computer simulation, Soil mechanics, Sandy soils, Tunnel design & construction, Construction management |
| Geographic Terms: | China |
| Abstract: | To address the amplified ground deformation, the difficulty of controlling shield construction parameters, and the pronounced seepage‐related risks associated with twin earth pressure balance (EPB) shield tunneling beneath a canal and a mid‐channel divider island in water‐rich sandy strata, this study is based on Phase I of Nantong Metro Line 1 in China. Physical and mechanical parameters of the water‐rich sandy strata are obtained through field sampling and laboratory testing. A three‐dimensional staged construction model is then established in FLAC3D to examine the effects of key construction variables on ground deformation, identify critical control targets, and analyze the response of the pore water pressure field to construction disturbance. The results show that ground settlement is governed by the superposition of plastic zones and the cumulative effect of volume loss induced by twin‐tunnel construction, and exhibits a segmented pattern consistent with the engineering boundary conditions. Settlement peaks tend to occur at the divider island, riverbanks, and transitional construction sections. The effect of excavation face support pressure on settlement is nonlinear, both underpressure and overpressure amplify settlement, but the adverse effect of overpressure is more pronounced. In canal sections, synchronous grouting pressure exhibits a compensation threshold, beyond which excessive uplift of the riverbed and a higher risk of differential deformation occur. While limiting uplift, a grouting pressure of 0.2 MPa provides relatively stable settlement control. Construction‐induced pore water pressure disturbance is concentrated mainly in the vicinity of the excavation face, and transitional sections are more prone to hydraulic gradient concentration. These findings clarify the mechanism of ground deformation during twin EPB shield tunneling beneath canals in water‐rich sandy strata and provide useful reference for shield parameter design, monitoring layout, and engineering risk assessment in similar projects. [ABSTRACT FROM AUTHOR] |
| Copyright of Advances in Civil Engineering is the property of Wiley-Blackwell 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: 194973627 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Numerical Simulation Study of Shield Tunnel Construction Under Canal in Water‐Rich Sand Layer. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Liu%2C+Jianhua%22">Liu, Jianhua</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Bai%2C+Liliuyang%22">Bai, Liliuyang</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> nicholasvvhite@outlook.com</i><br /><searchLink fieldCode="AR" term="%22Chen%2C+Xing%22">Chen, Xing</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Liu%2C+Ke%22">Liu, Ke</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhou%2C+Lejiang%22">Zhou, Lejiang</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ji%2C+Jian%22">Ji, Jian</searchLink> (AUTHOR)<i> jian.ji@hhu.edu.cn</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Advances+in+Civil+Engineering%22">Advances in Civil Engineering</searchLink>. 6/30/2026, Vol. 2026, p1-23. 23p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Pore+water+pressure%22">Pore water pressure</searchLink><br /><searchLink fieldCode="DE" term="%22Grouting%22">Grouting</searchLink><br /><searchLink fieldCode="DE" term="%22Computer+simulation%22">Computer simulation</searchLink><br /><searchLink fieldCode="DE" term="%22Soil+mechanics%22">Soil mechanics</searchLink><br /><searchLink fieldCode="DE" term="%22Sandy+soils%22">Sandy soils</searchLink><br /><searchLink fieldCode="DE" term="%22Tunnel+design+%26+construction%22">Tunnel design & construction</searchLink><br /><searchLink fieldCode="DE" term="%22Construction+management%22">Construction management</searchLink> – Name: SubjectGeographic Label: Geographic Terms Group: Su Data: <searchLink fieldCode="DE" term="%22China%22">China</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: To address the amplified ground deformation, the difficulty of controlling shield construction parameters, and the pronounced seepage‐related risks associated with twin earth pressure balance (EPB) shield tunneling beneath a canal and a mid‐channel divider island in water‐rich sandy strata, this study is based on Phase I of Nantong Metro Line 1 in China. Physical and mechanical parameters of the water‐rich sandy strata are obtained through field sampling and laboratory testing. A three‐dimensional staged construction model is then established in FLAC3D to examine the effects of key construction variables on ground deformation, identify critical control targets, and analyze the response of the pore water pressure field to construction disturbance. The results show that ground settlement is governed by the superposition of plastic zones and the cumulative effect of volume loss induced by twin‐tunnel construction, and exhibits a segmented pattern consistent with the engineering boundary conditions. Settlement peaks tend to occur at the divider island, riverbanks, and transitional construction sections. The effect of excavation face support pressure on settlement is nonlinear, both underpressure and overpressure amplify settlement, but the adverse effect of overpressure is more pronounced. In canal sections, synchronous grouting pressure exhibits a compensation threshold, beyond which excessive uplift of the riverbed and a higher risk of differential deformation occur. While limiting uplift, a grouting pressure of 0.2 MPa provides relatively stable settlement control. Construction‐induced pore water pressure disturbance is concentrated mainly in the vicinity of the excavation face, and transitional sections are more prone to hydraulic gradient concentration. These findings clarify the mechanism of ground deformation during twin EPB shield tunneling beneath canals in water‐rich sandy strata and provide useful reference for shield parameter design, monitoring layout, and engineering risk assessment in similar projects. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Advances in Civil Engineering is the property of Wiley-Blackwell 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: 10.1155/adce/4412394 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 23 StartPage: 1 Subjects: – SubjectFull: Pore water pressure Type: general – SubjectFull: Grouting Type: general – SubjectFull: Computer simulation Type: general – SubjectFull: Soil mechanics Type: general – SubjectFull: Sandy soils Type: general – SubjectFull: Tunnel design & construction Type: general – SubjectFull: Construction management Type: general – SubjectFull: China Type: general Titles: – TitleFull: Numerical Simulation Study of Shield Tunnel Construction Under Canal in Water‐Rich Sand Layer. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Liu, Jianhua – PersonEntity: Name: NameFull: Bai, Liliuyang – PersonEntity: Name: NameFull: Chen, Xing – PersonEntity: Name: NameFull: Liu, Ke – PersonEntity: Name: NameFull: Zhou, Lejiang – PersonEntity: Name: NameFull: Ji, Jian IsPartOfRelationships: – BibEntity: Dates: – D: 30 M: 06 Text: 6/30/2026 Type: published Y: 2026 Identifiers: – Type: issn-print Value: 16878086 Numbering: – Type: volume Value: 2026 Titles: – TitleFull: Advances in Civil Engineering Type: main |
| ResultId | 1 |
