Performance Investigation of Tunnel Lining with Cavities around Surrounding Rocks

Li, Jiajia; Fang, Yong; Cheng, Lu; Zhang, Yongxing; Lü, Wei

doi:10.1155/2020/1364984

Cited by 11 publications

(5 citation statements)

References 16 publications

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“…Generally, α � 0.09. From equations (1) and 3, the frost heaving force P can be expressed as follows:…”

Section: Calculation Of Frost Heaving Forcementioning

confidence: 99%

“…However, due to the low temperature, all year round and seasonal freeze-thaw cycles, tunnels in these areas are threatened by frost heave disasters. When the tunnel is underexcavated and the lining and the surrounding rock are not properly fitted, there will be cavity defects between the lining and the surrounding rock [1]. After the water accumulates in the cavity, it will freeze and expand in a low temperature environment.…”

Section: Introductionmentioning

confidence: 99%

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A Simplified Viscoelastic Solution of the Frost Heaving Force of Cavity Water behind Tunnel Linings

Guo

Zhang

et al. 2020

Advances in Civil Engineering

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With the high demand for construction of tunnels in China’s severe cold regions, the problem of frost heaving has become an important factor that endangers tunnel safety. This paper attempts to investigate the effect of frost heave of cavity water that widely exists in the tunneling engineering on the tunnel stability. According to the actual deformation of the surrounding rock of the tunnel, the viscoelastic behavior is considered to the surrounding rock. On the premise of the elastic solution of stagnant water frost heave, the viscoelastic solution of frost heaving pressure is deduced by Laplace transform using the generalized Kelvin model based on the elastic-viscoelastic correspondence principle. The frost heaving force is analyzed through a case study with variations in the size of the cavity defect as well as the constitutive model parameters. It is concluded that the frost heaving force increases with the cavity defect size; over time, the frost heaving force gradually increases, but it will eventually stabilize. It is found that when the frost heaving force reaches a certain level, the surrounding rock with low strength or the lining with insufficient strength will crack, and the frost heaving force will not continue to increase.

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“…Generally, α � 0.09. From equations (1) and 3, the frost heaving force P can be expressed as follows:…”

Section: Calculation Of Frost Heaving Forcementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Simplified Viscoelastic Solution of the Frost Heaving Force of Cavity Water behind Tunnel Linings

Guo

Zhang

et al. 2020

Advances in Civil Engineering

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“…Zhang et al [ 11 ] tested models to study the effect of contact loss on the lining of a double-arch tunnel when the surrounding rock behind the lining formed a void and established a numerical model for verification. Numerous studies proved that voids have a great impact on tunnel lining, which is reflected in the bending moment and axial force [ 12 , 13 ].…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation on the Mechanical Properties of Vault Void Lining and Steel Plate Strengthening

Shao

et al. 2023

Materials

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To study the mechanism of vault lining under different void heights and verify the strengthening effect of the attached steel plate, a CDP (concrete-damaged plasticity) model and the XFEM (extended finite element method) were used to construct the local numerical model of the vault void, and an experiment was carried out for verification. The strengthened structure of the steel plate was assembled with a combination of a two-component epoxy adhesive and chemical anchor bolts. Five lining models with various void thicknesses, together with their strengthened models, were evaluated. The results of the established numerical model were compared with the experimental results in terms of failure mode, vertical displacement, and load-deformation results. The results of the two numerical models were in good agreement with the experimental results, revealing the failure mechanism of the vault lining. The rigidity of the specimen after steel plate strengthening was significantly improved. When the void height was one-fourth of the secondary lining thickness, the lining cracks were reduced from 14 to 4, and the distribution width of the cracks was also reduced from 1.047 to 0.091 m after steel plate strengthening. The level of damage caused by cracking was significantly reduced, which proves the effectiveness of the surface-sticking method for steel plate strengthening.

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“…It has been estimated that the length of the tunnels constructed annually since 2013 reaches approximately 5200 km, and that the current tunnelling market represents 6-7% of the global infrastructure construction market. erefore, tunnelling has always been a significant focus of research in the area of civil engineering [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Ground Deformation Characteristics Induced by Mechanized Shield Twin Tunnelling along Curved Alignments

Guo

et al. 2021

Advances in Civil Engineering

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This paper investigates the ground deformation characteristics induced by mechanized shield twin tunnelling along curved alignments by adopting the nonlinear three-dimensional (3D) finite element method (FEM). The performance of the adopted FEM is demonstrated to be satisfactory by comparing the numerical analysis results with the field monitoring data in a typical case history and with the predicted results generated by a modified version of the Peck’s empirical Gaussian formula. It has been found that the tunnelling-induced transverse ground surface settlement troughs and the distributions of the subsurface horizontal and vertical ground displacements are mostly similar in both form and magnitude for the considered various radii of curvature of tunnel alignment including 50 m, 100 m, 150 m, 200 m, 250 m, 300 m, 400 m, and infinity (i.e., straight-line tunnel). Considering the variational characteristics of the ground deformations with the magnitude of the radius of curvature, the radius of curvature of 100 m can be regarded as a critical tunnel alignment radius of curvature controlling the transformation of the curved tunnelling-induced ground deformational behaviors. For the benefit of geotechnical engineers interested in curved tunnelling with a small radius of curvature, a discussion of the technologies for reducing the overexcavation and improving the accuracy of tunnel lining segment installation is also presented.

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Performance Investigation of Tunnel Lining with Cavities around Surrounding Rocks

Cited by 11 publications

References 16 publications

A Simplified Viscoelastic Solution of the Frost Heaving Force of Cavity Water behind Tunnel Linings

A Simplified Viscoelastic Solution of the Frost Heaving Force of Cavity Water behind Tunnel Linings

Numerical Investigation on the Mechanical Properties of Vault Void Lining and Steel Plate Strengthening

Ground Deformation Characteristics Induced by Mechanized Shield Twin Tunnelling along Curved Alignments

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