Effect of soil models on the prediction of tunnelling-induced deformations of structures

Giardina, Giorgia; Losacco, Nunzio; DeJong, Matthew J.; Viggiani, Giulia M. B.; Mair, RJ

doi:10.1680/jgeen.18.00127

Cited by 14 publications

(8 citation statements)

References 46 publications

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“…The calibration of material parameters, reported in Table S2 of "Supplemental Materials", was based on a mixed strategy, considering experimental data of the Fraction E sand used in the centrifuge tests, for similar relative densities. In particular, starting from the values reported in Giardina et al (2020), a calibration process was carried out with reference to the laboratory tests performed by Visone (2008), consisting of drained and undrained triaxial compression and extension tests as well as resonant column and torsional shear tests. The final set of values listed in "Supplemental Materials" was obtained by performing a further parametric study on two specific constants, i.e.…”

Section: Advanced Modelmentioning

confidence: 99%

Tunneling-Induced Deformation of Bare Frame Structures on Sand: Numerical Study of Building Deformations

Boldini

Losacco

Franza

et al. 2021

J. Geotech. Geoenviron. Eng.

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The paper compares the performance of two Finite Element Method approaches in reproducing the response of bare frame structures to tunneling in dry dense sand. A fully coupled approach, in which the tunnel, frame and soil are accounted for, is compared with a two-stage method incorporating simpler structural and soil models. The two approaches are validated against centrifuge test results of tunneling in sand beneath frames founded on either rafts or separate footings. Both approaches provide good estimates of displacements and distortions experienced by the frames provided that the soil-foundation interface and structural stiffness are correctly accounted for. The numerical models are also employed to extend the range of eccentric configurations investigated with centrifuge tests.The results demonstrate that shear deformations play an important role for all considered buildings, whereas only frames on separate footings are sensitive to horizontal ground movements. Finally, data are synthesized using modification factors and recently proposed relative stiffness terms.

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Section: Advanced Modelmentioning

confidence: 99%

Tunneling-Induced Deformation of Bare Frame Structures on Sand: Numerical Study of Building Deformations

Boldini

Losacco

Franza

et al. 2021

J. Geotech. Geoenviron. Eng.

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“…Analytical methods, such as the complex variable method (Verruijt, 1997;Zhang et al, 2011) and the stochastic medium theory (Yang et al, 2004), are always used to predict tunnelinginduced soil displacement. The centrifuge model method is used to shrink the scale of practical engineering to simulate the process of tunnel excavation, which is widely used in physical method tests (Franza et al, 2019;Giardina et al, 2020). Finite element analysis, a typical numerical simulation method, can be used to consider the nonlinear interaction between the tunnel and the soil to estimate soil displacements due to tunneling (Zhang et al, 2012;Miro et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Double-O-Tube Shield Tunneling-Induced Soil Displacement Considering Burial Depth and Convergence Mode: Transparent Soil Experiment and DEM Simulation

Zeng

Zhu

et al. 2022

Front. Earth Sci.

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Double-O-tube shield tunneling technology has gained extensive attention due to saving space and the high cost-effectiveness of the underground construction method. Estimating and predicting DOT shield tunneling-induced soil displacements is essential to prevent damage to nearby aboveground and underground structures in densely populated urban areas. This study develops a device for modeling DOT shield tunneling based on transparent soil technology and image processing technique and investigates soil displacement during the construction process of the DOT shield tunnel, which is considered in the uniform convergence mode (UCM) of soil loss. Meanwhile, the soil displacement under the non-uniform convergence mode (NCM) is analyzed contrastively using a two-dimension particle flow code (PFC2D). The results show that horizontal displacements increase gradually when the shield tail passes the monitoring face, while settlements increase rapidly. The maximum horizontal displacement of the surface and the maximum surface settlement under NCM are slightly larger than those under UCM. A trapezoid-shaped failure pattern of soil is experienced at three tunnel depths. The maximum soil displacement under NCM is 1.93, 2.10, and 2.05 times, respectively, as much as that under UCM, corresponding to H/D (the ratio of the tunnel depth to the tunnel diameter) = 1.0, 1.5, and 2.0. The soil arch effect above DOT tunnels arises as the DOT tunnel depth increases. Moreover, the experimental and numerical results are adopted to assess the validity of the proposed model, which indicates that the proposed model is close to the test results of the disturbance zone on DOT tunnels.

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“…Structure failure is a process that evolves from local damage to overall destruction [13,14]. Different initial damage causes different failure processes [15][16][17][18][19][20]. The system reliability theory can analyze the reliability evolution of different failure modes [8,[21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Tunnel Failure Evolution and System Reliability Analysis Based on the β-unzipping Method

2021

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The structural failure of a tunnel is a process that evolves from local damage to overall destruction. The system reliability analysis method can be useful for analyzing the evolutionary law of local structural failure. In many complex stress environments, the structural performance function may be very complicated or even impossible to solve. This paper establishes a response surface function to represent the implicit tunnel performance function. The reliability of the shear capacity of a tunnel is considered. The critical parts and critical failure paths of the tunnel system are determined using the β-unzipping method. Failure evolution is analyzed to obtain the failure process of the tunnel system. Different failure modes are shown under different cases. Based on the partial failure probability and impact on the tunnel system, the risk levels of the critical parts at each stage of the failure history are evaluated. Therefore, the tunnel failure tree model obtained by combining the response surface method and β-unzipping method plays an important role in tunnel reliability evolution, and can evaluate tunnel safety comprehensively.

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Effect of soil models on the prediction of tunnelling-induced deformations of structures

Cited by 14 publications

References 46 publications

Tunneling-Induced Deformation of Bare Frame Structures on Sand: Numerical Study of Building Deformations

Tunneling-Induced Deformation of Bare Frame Structures on Sand: Numerical Study of Building Deformations

Double-O-Tube Shield Tunneling-Induced Soil Displacement Considering Burial Depth and Convergence Mode: Transparent Soil Experiment and DEM Simulation

Tunnel Failure Evolution and System Reliability Analysis Based on the β-unzipping Method

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