A variational approach to the analysis of excavation-induced vertical deformation in a segmental tunnel

Huang, Shengfeng; Chen, Zhibo; Xie, Yongning; Lin, Zhiyuan

doi:10.1016/j.tust.2021.104342

Cited by 10 publications

(2 citation statements)

References 26 publications

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“…Additional strains have been comprehensively investigated using field measurements [6][7][8][9], numerical simulations [10][11][12], and model tests [13][14][15]. The theoretical analysis combining the two-stage method and the elastic beam model provides a simple and effective scheme with a clear mechanical concept and low computational costs, which can be employed to analyze the mechanical characteristics of existing tunnels [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Investigating the influence of excavating a tunnel undercrossing an existing tunnel at zero distance

Xu,

Lei,

Zhu

et al. 2024

PLoS ONE

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In urban areas with limited underground space, the new tunnel construction introduces additional loads and displacements to existing tunnels, raising serious safety concerns. These concerns become particularly pronounced in the case of closely undercrossing excavation at zero-distance. The conventional elastic foundation beam model, which assumes constant reaction coefficients for the subgrade, fails to account for foundation loss. In this study, the existing tunnel is modeled as an Euler-Bernoulli beam supported by the Pasternak elastic foundation, and the foundation loss caused by zero-distance undercrossing excavations is considered. Furthermore, an analytical solution is proposed to evaluate the mechanical response in segments, by establishing governing differential equations and boundary conditions for the excavation and neutral zones, and underpinning loads are also considered. The analytical solution is validated in two case studies. Finally, a parametric analysis is performed to explore the influence of various parameters on the mechanical response of the existing tunnel.

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Section: Introductionmentioning

confidence: 99%

Investigating the influence of excavating a tunnel undercrossing an existing tunnel at zero distance

Xu,

Lei,

Zhu

et al. 2024

PLoS ONE

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“…The growing traffic in metropolitan areas and the need for high-performance rail systems has driven cities to use their underground space for transport infrastructure [1,2]. This resulted in increased construction of tunnels and continuous development in tunnelling technology in the past years.…”

Section: Introductionmentioning

confidence: 99%

EPBM Advance Rate Prediction Using Hybrid Feature Selection and Support Vector Regression Modeling

Huang¹,

Esmaeilpour²,

Dastpak³

et al. 2023

Proceedings of the TMIC 2022 Slope Stability Conference (TMIC 2022)

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Advance rate (AR) prediction is crucial for optimal mechanized tunneling performance. However, the type of input features used when developing AR prediction models vary greatly from study to study. In this paper, a hybrid automatic feature selection method is presented and demonstrated through the development of a support vector regression (SVR) model for AR prediction in Earth pressure balance machine (EPBM) tunnel construction. EPBM datasets are collected from a tunnel project in the city of Porto, Portugal. Irrelevant features whose values are constant for most of the time were first removed via constant and quasi-constant detection method (CQD). Sequential forward selection (SFS) was then performed to determine the best subset of features to develop the best performed model. The results showed that the SVR model successfully predicted AR using the selected features with squared correlation coefficient (R 2 ) of 0.919 and 0.884 for training and testing, respectively. The efficiency of the feature selection method is demonstrated by comparing the results of the SVR model with feature selection and the one without. It is proved that proposed method helps improve the accuracy of the predictions by 8% and 17% for training and testing, respectively.

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Basement excavation influences zones for deformation of the adjacent side tunnel

et al. 2022

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A variational approach to the analysis of excavation-induced vertical deformation in a segmental tunnel

Cited by 10 publications

References 26 publications

Investigating the influence of excavating a tunnel undercrossing an existing tunnel at zero distance

Investigating the influence of excavating a tunnel undercrossing an existing tunnel at zero distance

EPBM Advance Rate Prediction Using Hybrid Feature Selection and Support Vector Regression Modeling

Basement excavation influences zones for deformation of the adjacent side tunnel

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