Zhang, X; Zhang, Z; Sun, W; Hu, J; Zhang, L and Zhu, W (2025) The mechanical deformation characteristics of the internal structure of large diameter shield tunnel in different construction stages. Engineering, Construction and Architectural Management, 32(4), pp. 2190-2209. ISSN 0969-9988
Abstract
Purpose: Under the repeated action of the construction load, opening deformation and disturbed deformation occurred at the precast box culvert joints of the shield tunnel. The objective of this paper is to investigate the effect of construction vehicle loading on the mechanical deformation characteristics of the internal structure of a large-diameter shield tunnel during the entire construction period. Design/methodology/approach: The structural response of the prefabricated internal structure under heavy construction vehicle loads at four different construction stages (prefabricated box culvert installation, curved lining cast-in-place, lane slab installation and pavement structure casting) was analyzed through field tests and ABAQUS (finite element analysis software) numerical simulation. Findings: Heavy construction vehicles can cause significant mechanical impacts on the internal structure, as the construction phase progresses, the integrity of the internal structure with the tunnel section increases. The vertical and horizontal deformation of the internal structure is significantly reduced, and the overall stress level of the internal structure is reduced. The bolts connecting the precast box culvert have the maximum stress at the initial stage of construction, as the construction proceeds the stress distribution among the bolts gradually becomes uniform. Originality/value: This study can provide a reference for the design model, theoretical analysis and construction technology of the internal structure during the construction of large-diameter tunnel projects.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | construction stages; field test; internal structure; large diameter shield tunnel; mechanical and deformation characteristic; numerical simulation |
| Index terms: | field test, deformation, methodology, design model, tunnel, loading, construction phase, heavy construction, construction stages, construction technology, finite element analysis, integrity, numerical simulation |
| Subjects: | engineering analysis, research methods, health safety and environment, design process, construction operations, digital engineering, infrastructure and transport systems, material properties and characteristics, modelling and simulation, project delivery, data collection methods |
| Topics: | Research Practice, Construction Materials, Site Management, Design Practice, Digital Applications, Health and Safety, Project Management, Engineering Principles |
| Descriptive scope: | 4 PCTA |
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