Face stability analysis of shallow circular tunnels in cohesive–frictional soils

Zhang, Chengping; Han, Kaihang; Zhang, Dingli

doi:10.1016/j.tust.2015.08.007

Cited by 250 publications

(53 citation statements)

References 28 publications

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“…Face pressure needs to be maintained within certain limits to avoid collapse or blow-out. For soil-dominated conditions, these limits may be obtained at the design stage by means of limit equilibrium techniques (Anagnostou and Kovari, 1996), plastic analysis (Mollon et al, 2009) and/or numerical methods (Zhang et al, 2015). The later are also amenable to study more complicated cases such as mixed face rock conditions (Senent and Jimenez, 2015).…”

Section: Cmentioning

confidence: 99%

Thrust and torque components on mixed-face EPB drives

González

Arroyo

Gens

2016

Tunnelling and Underground Space Technology

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In this communication we propose a method to estimate net thrust and torque applied at the excavation front by cutting tools from EPB machines when they are working in mixed faces constituted by soils and soft rock. The method is inspired by similar simplifications used for the analysis of TBM drives in rock. The proposal is validated using a database of EPB registers which were gathered from more than 35 km of tunnel drives excavated in soils, soft rock and heterogeneous media. The results allow us to assess the influence of the type of ground excavated and its geotechnical properties on the net thrust and torque applied.Peer ReviewedPostprint (author's final draft

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Section: Cmentioning

confidence: 99%

Thrust and torque components on mixed-face EPB drives

González

Arroyo

Gens

2016

Tunnelling and Underground Space Technology

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“…Numerical methods are effective tools to address complex dynamic problems and consider the actual dimensions of tunnels, nonlinear behavior, etc. However, these methods are time‐consuming, and the numerical accuracy is correlated with the numerical algorithm . In contrast, analytical solutions may capture the physical nature of problems and serve as the benchmark of complex numerical models.…”

Section: Introductionmentioning

confidence: 99%

Analytical solution for longitudinal seismic response of long tunnels subjected to Rayleigh waves

Yang

Yuan

et al. 2020

Num Anal Meth Geomechanics

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The longitudinal seismic response of a long tunnel subjected to Rayleigh waves is investigated in this paper. The tunnel is assumed to be infinitely long, has a uniform cross section, and rests on a viscoelastic foundation. The free-field deformation under Rayleigh waves traveling parallel to the tunnel axis is decomposed into two directions, namely, the axial motion and the vertical motion, and transformed into dynamic loads imposed on the tunnel. Based on the Fourier and Laplace integral transform techniques, the governing equations of tunnels are simplified into algebraic equations, and the analytical solutions are obtained with the convolution theorem. The final solutions of the tunnel responses in terms of deflection, velocity, acceleration, axial force, bending moment, and shear force are investigated. The proposed solution is verified by comparison of its results and those from the finite element program ABAQUS. Further parametric analysis is carried out to investigate the influence of soil-structure relative stiffness ratio and wave frequency on dynamic longitudinal responses of the tunnel. K E Y W O R D S analytical solution, integral transform, long tunnel, Rayleigh waves

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“…With the development of the computer technique and numerical software, the numerical simulation method has become more and more effective to solve the problem in tunnel construction [15,16]. Finno and Clough [17] simulated the entire EPB tunnelling process in five stages by the finite element program and obtained the lateral displacement.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study and Field Monitoring of the Ground Deformation Induced by Large Slurry Shield Tunnelling in Sandy Cobble Ground

Zhang

Cai

Zhu

2019

Advances in Civil Engineering

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This paper presents the ground deformation induced by the large slurry shield tunnelling with a diameter of about 12 m in urban areas, which may challenge the safety of the existing nearby constructions and infrastructures. In this study, the ground deformation is analyzed by a three-dimensional finite difference model, involving the simulation of tunnelling advance, grouting, and grouting hardening. The transverse settlement, longitudinal settlement, and horizontal displacement of the ground are analyzed by comparing the simulation results with the field measurements in the Rapid Transit Line Project from Beijing Railway station to West Beijing Railway station in China. The numerical model proposed in this paper could well predict the ground deformation induced by large slurry shield tunnelling. The results show that the main transverse settlement occurs within the zone about 1.5 times of the excavation diameter, and the settlement during the passage of the shield and the tail void plays a most important role in the excavation process.

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Face stability analysis of shallow circular tunnels in cohesive–frictional soils

Cited by 250 publications

References 28 publications

Thrust and torque components on mixed-face EPB drives

Thrust and torque components on mixed-face EPB drives

Analytical solution for longitudinal seismic response of long tunnels subjected to Rayleigh waves

Numerical Study and Field Monitoring of the Ground Deformation Induced by Large Slurry Shield Tunnelling in Sandy Cobble Ground

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