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Theory and Field to Determine the Construction of Bridge and Tunnel Linked Segment.

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Title: Theory and Field to Determine the Construction of Bridge and Tunnel Linked Segment.
Authors: Zhang, Anrui1 (AUTHOR) 1063638258@qq.com, Tan, Wei2 (AUTHOR), Yang, ShiYu2 (AUTHOR), Yang, Hong1 (AUTHOR), Cao, Kun1 (AUTHOR), Wang, Wei2 (AUTHOR) wangweicsu@csu.edu.cn, Gao, Meng (AUTHOR) gmxyz@sdust.edu.cn
Source: Advances in Civil Engineering. 4/13/2026, Vol. 2026, p1-15. 15p.
Subjects: Excavation (Civil engineering), Deformations (Mechanics), Computer simulation, Construction industry safety, Tunnel design & construction
Abstract: Bridge–tunnel linked sections characterized by ultra‐small clear distances and steep slopes pose significant construction risks due to strong spatial constraints and complex mechanical interactions between adjacent underground structures. In such conditions, excavation method selection becomes a critical factor governing construction safety and deformation control. Taking the Yuxi‐side tunnel group of the Lvzhijiang Bridge as a case study, this study establishes a three‐dimensional numerical model and integrates it with field monitoring data to systematically compare three excavation methods: full‐face excavation, bench cut, and side heading with pilot tunnels. The schemes are compared using key comparison metrics for scheme selection, including crown displacement evolution, surrounding‐rock plastic‐zone development, and construction safety implications. These results indicate that, although differences in plastic‐zone extent among methods are moderate, the side heading method with pilot tunnels exhibits superior deformation control and more stable excavation responses under ultra‐small clear‐distance conditions. Field monitoring further validates the numerical trends and highlights the influence of site‐specific factors such as potential sliding surfaces and rainfall. These results support a scheme‐selection logic that prioritizes deformation controllability over excavation efficiency in ultra‐small clear‐distance portal zones, and indicate that the side heading method with pilot tunnels is a safer option under the investigated site constraints. [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.)
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  Data: Theory and Field to Determine the Construction of Bridge and Tunnel Linked Segment.
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  Data: <searchLink fieldCode="AR" term="%22Zhang%2C+Anrui%22">Zhang, Anrui</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> 1063638258@qq.com</i><br /><searchLink fieldCode="AR" term="%22Tan%2C+Wei%22">Tan, Wei</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yang%2C+ShiYu%22">Yang, ShiYu</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yang%2C+Hong%22">Yang, Hong</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Cao%2C+Kun%22">Cao, Kun</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Wei%22">Wang, Wei</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> wangweicsu@csu.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Gao%2C+Meng%22">Gao, Meng</searchLink> (AUTHOR)<i> gmxyz@sdust.edu.cn</i>
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  Data: <searchLink fieldCode="JN" term="%22Advances+in+Civil+Engineering%22">Advances in Civil Engineering</searchLink>. 4/13/2026, Vol. 2026, p1-15. 15p.
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  Data: <searchLink fieldCode="DE" term="%22Excavation+%28Civil+engineering%29%22">Excavation (Civil engineering)</searchLink><br /><searchLink fieldCode="DE" term="%22Deformations+%28Mechanics%29%22">Deformations (Mechanics)</searchLink><br /><searchLink fieldCode="DE" term="%22Computer+simulation%22">Computer simulation</searchLink><br /><searchLink fieldCode="DE" term="%22Construction+industry+safety%22">Construction industry safety</searchLink><br /><searchLink fieldCode="DE" term="%22Tunnel+design+%26+construction%22">Tunnel design & construction</searchLink>
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  Label: Abstract
  Group: Ab
  Data: Bridge–tunnel linked sections characterized by ultra‐small clear distances and steep slopes pose significant construction risks due to strong spatial constraints and complex mechanical interactions between adjacent underground structures. In such conditions, excavation method selection becomes a critical factor governing construction safety and deformation control. Taking the Yuxi‐side tunnel group of the Lvzhijiang Bridge as a case study, this study establishes a three‐dimensional numerical model and integrates it with field monitoring data to systematically compare three excavation methods: full‐face excavation, bench cut, and side heading with pilot tunnels. The schemes are compared using key comparison metrics for scheme selection, including crown displacement evolution, surrounding‐rock plastic‐zone development, and construction safety implications. These results indicate that, although differences in plastic‐zone extent among methods are moderate, the side heading method with pilot tunnels exhibits superior deformation control and more stable excavation responses under ultra‐small clear‐distance conditions. Field monitoring further validates the numerical trends and highlights the influence of site‐specific factors such as potential sliding surfaces and rainfall. These results support a scheme‐selection logic that prioritizes deformation controllability over excavation efficiency in ultra‐small clear‐distance portal zones, and indicate that the side heading method with pilot tunnels is a safer option under the investigated site constraints. [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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        Value: 10.1155/adce/2885347
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      – Code: eng
        Text: English
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        PageCount: 15
        StartPage: 1
    Subjects:
      – SubjectFull: Excavation (Civil engineering)
        Type: general
      – SubjectFull: Deformations (Mechanics)
        Type: general
      – SubjectFull: Computer simulation
        Type: general
      – SubjectFull: Construction industry safety
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      – SubjectFull: Tunnel design & construction
        Type: general
    Titles:
      – TitleFull: Theory and Field to Determine the Construction of Bridge and Tunnel Linked Segment.
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            NameFull: Zhang, Anrui
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            NameFull: Tan, Wei
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              M: 04
              Text: 4/13/2026
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              Y: 2026
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