Academic Journal
Performance of an Irregular Top-Down Excavation with Synchronous Construction of Superstructure and Substructure: Case Study and Numerical Exploration.
| Title: | Performance of an Irregular Top-Down Excavation with Synchronous Construction of Superstructure and Substructure: Case Study and Numerical Exploration. |
|---|---|
| Authors: | Huang, Keqi, He, Xiaopei, Liu, Xiaomin, Wang, Jiawei, Zhang, Qiang, Ge, Longbo |
| Source: | International Journal of Geomechanics; Jul2026, Vol. 26 Issue 7, p1-13, 13p |
| Subject Terms: | Excavation (Civil engineering), Retaining walls, Structural analysis (Engineering), Computer simulation, Building foundations, Building design & construction |
| Geographic Terms: | Shenzhen (Guangdong Sheng, China : East), China |
| Abstract: | This study investigates a 24-m-deep irregular excavation in Shenzhen, China, which is surrounded by dense buildings and constructed by the top-down method with synchronous construction of the superstructure and substructure. Based on field instrumentation data, this paper uses finite-element software PLAXIS to simulate the entire construction process and verifies the precision of the numerical model. The numerical analysis reveals the three-dimensional deformation characteristics of the retaining wall, the vertical deformation patterns of the supporting system, and the axial force redistribution in the slabs, thereby providing a theoretical basis for optimization design. The following major findings are obtained: (1) adjacent buildings, especially high-rise buildings, increase retaining wall deflections as a surcharge, and the construction of the superstructure has a negligible effect on retaining wall deformation; (2) the irregular excavation geometry leads to an asymmetrical wall deflection distribution, with larger deflections near external corners because of a smaller boundary constraint. The large internal corner causes a double-peak distribution of wall deflection; (3) the overload generated by superstructure construction leads to a decrease in the rising rate of the column and retaining wall and even causes settlement; (4) the stress concentration phenomenon is observed at the excavation openings, and structural design recommendations such as local strengthening around the edges of openings are provided; (5) the excavation-induced building damage potential is assessed as negligible, confirmed by the absence of cracks in practice. [ABSTRACT FROM AUTHOR] |
| Copyright of International Journal of Geomechanics is the property of American Society of Civil Engineers 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: | Complementary Index |
| FullText | Text: Availability: 0 |
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| Header | DbId: edb DbLabel: Complementary Index An: 193805086 RelevancyScore: 1082 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 1082.42175292969 |
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| Items | – Name: Title Label: Title Group: Ti Data: Performance of an Irregular Top-Down Excavation with Synchronous Construction of Superstructure and Substructure: Case Study and Numerical Exploration. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Huang%2C+Keqi%22">Huang, Keqi</searchLink><br /><searchLink fieldCode="AR" term="%22He%2C+Xiaopei%22">He, Xiaopei</searchLink><br /><searchLink fieldCode="AR" term="%22Liu%2C+Xiaomin%22">Liu, Xiaomin</searchLink><br /><searchLink fieldCode="AR" term="%22Wang%2C+Jiawei%22">Wang, Jiawei</searchLink><br /><searchLink fieldCode="AR" term="%22Zhang%2C+Qiang%22">Zhang, Qiang</searchLink><br /><searchLink fieldCode="AR" term="%22Ge%2C+Longbo%22">Ge, Longbo</searchLink> – Name: TitleSource Label: Source Group: Src Data: International Journal of Geomechanics; Jul2026, Vol. 26 Issue 7, p1-13, 13p – Name: Subject Label: Subject Terms Group: Su Data: <searchLink fieldCode="DE" term="%22Excavation+%28Civil+engineering%29%22">Excavation (Civil engineering)</searchLink><br /><searchLink fieldCode="DE" term="%22Retaining+walls%22">Retaining walls</searchLink><br /><searchLink fieldCode="DE" term="%22Structural+analysis+%28Engineering%29%22">Structural analysis (Engineering)</searchLink><br /><searchLink fieldCode="DE" term="%22Computer+simulation%22">Computer simulation</searchLink><br /><searchLink fieldCode="DE" term="%22Building+foundations%22">Building foundations</searchLink><br /><searchLink fieldCode="DE" term="%22Building+design+%26+construction%22">Building design & construction</searchLink> – Name: SubjectGeographic Label: Geographic Terms Group: Su Data: <searchLink fieldCode="DE" term="%22Shenzhen+%28Guangdong+Sheng%2C+China+%3A+East%29%22">Shenzhen (Guangdong Sheng, China : East)</searchLink><br /><searchLink fieldCode="DE" term="%22China%22">China</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: This study investigates a 24-m-deep irregular excavation in Shenzhen, China, which is surrounded by dense buildings and constructed by the top-down method with synchronous construction of the superstructure and substructure. Based on field instrumentation data, this paper uses finite-element software PLAXIS to simulate the entire construction process and verifies the precision of the numerical model. The numerical analysis reveals the three-dimensional deformation characteristics of the retaining wall, the vertical deformation patterns of the supporting system, and the axial force redistribution in the slabs, thereby providing a theoretical basis for optimization design. The following major findings are obtained: (1) adjacent buildings, especially high-rise buildings, increase retaining wall deflections as a surcharge, and the construction of the superstructure has a negligible effect on retaining wall deformation; (2) the irregular excavation geometry leads to an asymmetrical wall deflection distribution, with larger deflections near external corners because of a smaller boundary constraint. The large internal corner causes a double-peak distribution of wall deflection; (3) the overload generated by superstructure construction leads to a decrease in the rising rate of the column and retaining wall and even causes settlement; (4) the stress concentration phenomenon is observed at the excavation openings, and structural design recommendations such as local strengthening around the edges of openings are provided; (5) the excavation-induced building damage potential is assessed as negligible, confirmed by the absence of cracks in practice. [ABSTRACT FROM AUTHOR] – Name: Abstract Label: Group: Ab Data: <i>Copyright of International Journal of Geomechanics is the property of American Society of Civil Engineers 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: 10.1061/IJGNAI.GMENG-13072 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 13 StartPage: 1 Subjects: – SubjectFull: Shenzhen (Guangdong Sheng, China : East) Type: general – SubjectFull: China Type: general – SubjectFull: Excavation (Civil engineering) Type: general – SubjectFull: Retaining walls Type: general – SubjectFull: Structural analysis (Engineering) Type: general – SubjectFull: Computer simulation Type: general – SubjectFull: Building foundations Type: general – SubjectFull: Building design & construction Type: general Titles: – TitleFull: Performance of an Irregular Top-Down Excavation with Synchronous Construction of Superstructure and Substructure: Case Study and Numerical Exploration. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Huang, Keqi – PersonEntity: Name: NameFull: He, Xiaopei – PersonEntity: Name: NameFull: Liu, Xiaomin – PersonEntity: Name: NameFull: Wang, Jiawei – PersonEntity: Name: NameFull: Zhang, Qiang – PersonEntity: Name: NameFull: Ge, Longbo IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 07 Text: Jul2026 Type: published Y: 2026 Identifiers: – Type: issn-print Value: 15323641 Numbering: – Type: volume Value: 26 – Type: issue Value: 7 Titles: – TitleFull: International Journal of Geomechanics Type: main |
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