Analytical solution for longitudinal bending stiffness of shield tunnels

Yu, Haitao; Cai, Chuan; Bobet, Antonio; Zhao, Xu; Yuan, Yong

doi:10.1016/j.tust.2018.09.011

Cited by 118 publications

(22 citation statements)

References 18 publications

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“…The seismic design and analysis of tunnels has been investigated for many decades . Many researchers have explored the seismic response of tunnels under body waves through various methods, such as model tests, numerical simulations, and analytical methods . However, it is acknowledged that the safety of shallow tunnels far from the epicenter of an earthquake is mainly compromised by Rayleigh waves .…”

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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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

Self Cite

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“…Recently, with the continuous railway and highway construction in China, tunnel engineering has been developing in situations of long, large and deep burial [1][2][3][4][5][6][7]. It is inevitable more long tunnels will be built in soft and weak surrounding rock areas [8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Stress Field Distribution and Deformation Law of Large Deformation Tunnel Excavation in Soft Rock Mass

et al. 2019

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The problem of large deformation is very prominent in deep-buried tunnel excavation in soft rock, which brings serious potential safety hazards and economic losses to projects. Knowledge of the stress field distribution and deformation law is the key to ensuring rational design and safe construction in large deformation tunnels of soft rock. As described in this paper, theoretical analysis, numerical simulation and field monitoring were employed to investigate the surrounding rock stress and displacement state in the Dongsong hydropower station in Sichuan Province, China. The results show that the short-bench construction method can effectively control the deformation of surrounding rock and range of the plastic zone. In order to reserve enough working space, the optimum bench length in the actual construction was 10 to 14 m. The peripheral displacement and plastic radius decreased with the increase of tunnel support strength and the advance of supporting time. The displacement can be effectively controlled by applying the second lining in time at a position about twice the diameter of the hole (16 m) from the working face. A reasonable reserved deformation should be adopted to avoid secondary expanding excavation. The values of different positions in the tunnel laterally and longitudinally may be different, and adjustments are needed according to the actual situation.

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“…Chinese tunnel boom shows no sign of abating. So far, the total length of tunnels (Railways and highways) has been about 30,000 km and 29,600 km, a mounting number of tunnels have been built in complex geological conditions (Lai et al 2016a(Lai et al , 2016b(Lai et al , 2016cQiu et al 2017;Li et al 2018aLi et al , 2018bYan et al 2018;Yu et al 2019). The methane explosion accidents of tunnel construction in coal strata often cause great losses to people's lives and property.…”

Section: Introductionmentioning

confidence: 99%

Methane explosion accidents of tunnels in SW China

Fan

et al. 2019

Geomatics, Natural Hazards and Risk

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This Express Letter reports three methane explosion accidents during tunnel construction in Southwest China. In recent years, tunnel construction of China is developing rapidly. The geological conditions of the tunnel passing through are extremely complex, especially, tunnels in coal strata increase rapidly, what's worse, many methane explosions occur during the tunnel construction. The backgrounds, causes and rescue operation of three methane explosion accidents situation are studied. Furthermore, we proposed relevant measures to prevent methane explosions of tunnels. ARTICLE HISTORY

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Analytical solution for longitudinal bending stiffness of shield tunnels

Cited by 118 publications

References 18 publications

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

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

Stress Field Distribution and Deformation Law of Large Deformation Tunnel Excavation in Soft Rock Mass

Methane explosion accidents of tunnels in SW China

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