Ground Movements due to Shallow Tunnels in Soft Ground. I: Analytical Solutions

Pinto, Federico; Whittle, Andrew J.

doi:10.1061/(asce)gt.1943-5606.0000948

Cited by 103 publications

(65 citation statements)

References 19 publications

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“…Mechanized tunneling is a complex engineering problem involving various processes such as consequential excavation, grouting and lining installation [8]. Kasper and Meschke [9] presented a 3D finite element model to take into account all relevant components of the construction process (e.g.…”

Section: Introductionmentioning

confidence: 99%

Model validation and calibration via back analysis for mechanized tunnel simulations – The Western Scheldt tunnel case

Zhao

Lavasan

Thomas

et al. 2015

Computers and Geotechnics

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Section: Introductionmentioning

confidence: 99%

Model validation and calibration via back analysis for mechanized tunnel simulations – The Western Scheldt tunnel case

Zhao

Lavasan

Thomas

et al. 2015

Computers and Geotechnics

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“…Mogi 1958 with a small typo, Yoshikawa 1961), underground tunnels when constructed (see e.g. Verruijt 1996;Zymnis et al 2013;Pinto & Whittle 2014) and underground cavities that collapse. For relatively simple cavity (or reservoir) geometries and boundary conditions inside uniform elastic half-spaces, analytical solutions for rock mass and ground surface displacements exist (see e.g.…”

Section: P R E V I O U S At T E M P T S T O M O D E L L I N G P Ro D mentioning

confidence: 99%

Ground motions induced by a producing hydrocarbon reservoir that is overlain by a viscoelastic rocksalt layer: a numerical model

Marketos¹,

Govers²,

Spiers³

2015

Geophys. J. Int.

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S U M M A R YHydrocarbon reservoir pressure depletion leads to stress changes inside the reservoir and ground deformation which is registered at the surface as subsidence. As reservoirs are often overlain by layers of rocksalt (or other evaporites), which are materials that flow so as to relax stresses inside them, there is the potential for time-varying surface subsidence. This work focuses on understanding the macroscopic mechanisms that lead to rocksalt flow-induced ground displacements. A Finite Element Model is used for this purpose in which the rocksalt layer is represented by a viscoelastic Maxwell material. Two distinct mechanisms that lead to displacement are observed. These are active during different stages of the deformation and have different timescales associated with them. An important observation is that the timescale for deformation that is measured at the ground surface is not equal to the timescale for deformation of a viscoelastic material element, but can be many times larger than that. The sensitivity of the response to the thickness and location of the rocksalt layer is also presented. Conclusions are drawn which allow for the relative importance of the presence of the rocksalt layer to be assessed and for a framework for understanding time-dependent subsidence above producing hydrocarbon reservoirs to be developed. Finally the changes in stress distribution around a producing reservoir are also briefly discussed.

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“…16,17 There are many researches on the influencing factors affecting the ground movement during tunnel excavation. Pinto and Whittle, 18 Pinto et al 19 defined the tunnel overburden as a significant parameter that governs the tunneling induced ground movement in their analytical solution, which was validated on the basis of real tunneling projects. Another study conducted by Franzius et al 20 demonstrated the influence of K 0 on ground surface movements resulting from tunnel excavation.…”

Section: Introductionmentioning

confidence: 99%

Mechanized tunneling induced ground movement and its dependency on the tunnel volume loss and soil properties

Zhao

Lavasan

Thomas³

et al. 2019

Num Anal Meth Geomechanics

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Summary This study investigates the ground movements due to mechanized tunnel excavation by applying two‐dimensional finite element analyses. To assess the contribution of the compressibility and plasticity of the soil on the ground movements, different constitutive models are employed to describe the soil behavior. The influence of volume loss around the tunnel on the surface volume loss is investigated, and a quadratic correlation between them is proposed. Consequently, the empirical Gaussian distribution curve, which is generally used to determine the tunneling induced settlement trough, is improved by applying the proposed quadratic correlation between surface volume loss and tunnel volume loss. Furthermore, the settlement trough width parameter has been derived by a linear function of tunnel volume loss as well. The proposed equations are validated via a case study of centrifuge tests from the literature. The results show that the proposed modification enhances the empirical solution by having better knowledge on the model parameters. Additionally, tunnel overburden and coefficient of lateral earth pressure at rest (K0) are taken into account to study their influence on the tunneling induced surface settlements. Finally, global sensitivity analysis is applied to evaluate the relative importance of corresponding model parameters in terms of their influence on the ground movements.

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Ground Movements due to Shallow Tunnels in Soft Ground. I: Analytical Solutions

Cited by 103 publications

References 19 publications

Model validation and calibration via back analysis for mechanized tunnel simulations – The Western Scheldt tunnel case

Model validation and calibration via back analysis for mechanized tunnel simulations – The Western Scheldt tunnel case

Ground motions induced by a producing hydrocarbon reservoir that is overlain by a viscoelastic rocksalt layer: a numerical model

Mechanized tunneling induced ground movement and its dependency on the tunnel volume loss and soil properties

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