Upper and lower bounds for three-dimensional undrained stability of shallow tunnels

Antão, A. N.; Silva, M. Vicente da; Monteiro, Natividade; Deusdado, N.

doi:10.1016/j.trgeo.2020.100491

Cited by 6 publications

(2 citation statements)

References 33 publications

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“…The stress distribution and deformation characteristics of surrounding rocks will help to understand tunnel stability research. Researchers (Liu et al, 2020;Antão et al, 2021;Fernández et al, 2021;Han et al, 2021;Nguyen and Nguyen-Son, 2022;Pelech et al, 2022;Zhuo et al, 2022;Qin et al, 2023c) established numerical models based on the numerical method, e.g., finite element method or discrete element method with the continuous improvement of computer performance and the development of computing technology. Numerical modeling is closer to the accurate geometric scale, surrounding rock materials, loading effects, boundary conditions, etc., and visualizes the process of surrounding rock loading evolution.…”

Section: Introductionmentioning

confidence: 99%

The stability evaluation of clay tunnels via the non-linear deterioration of physical and mechanical properties of surrounding rocks

Huang

Liu²,

Ma³

et al. 2023

Front. Earth Sci.

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Simple, fast, and reliable methods for the stability evaluation of tunnels can facilitate the construction and development of tunneling projects. The problems related to tunnel stability at this stage can be well analyzed via theoretical analysis method, model test method, or numerical analysis method. On the other hand, those methods are hard to be effectively analyzed these projects with higher importance, shorter decision and design period, and more urgent construction period. This paper proposed research works on the stability evaluation of clay tunnels. Firstly, a state function with the variables of stress and strain state is presented to predict the stress and strain states of surrounding rocks caused by tunnel excavation, which characterize the physical-mechanical state of surrounding rocks (also called stability state). Secondly, the non-linear deterioration of the physical and mechanical properties of surrounding rocks will be simulated, and the expressions and calculation methods of the tunnel stability reserve factor will be yielded. Finally, the results of the proposed method were compared with the strength reduction method and the limit equilibrium method with a clay tunnel example. The comparison between the three feature points of the arch crown, sidewall, and arch bottom showed that the stability reserve factor of the clay tunnel was smaller than those of the strength reduction method and the limit equilibrium method. The values of limit displacement obtained by the proposed method were closer to the field monitoring data than that of the strength reduction method. Therefore, this study could be better applied to the stability evaluation of clay tunnels.

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Section: Introductionmentioning

confidence: 99%

The stability evaluation of clay tunnels via the non-linear deterioration of physical and mechanical properties of surrounding rocks

Huang

Liu²,

Ma³

et al. 2023

Front. Earth Sci.

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show abstract

“…All research and practice are aimed at better ensuring the stability of the construction solution to support the tunnel surrounding rock (Dias, 2011;Pan and Dias, 2017;Park et al, 2017;Zare Naghadehi et al, 2019;Bai et al, 2021b;Zhang et al, 2022a). Thus, researchers have conducted various studies on the mechanical state, deformation state, and stability of the surrounding rock through theoretical, experimental, numerical, and field monitoring methods to study the tunnel burial depth, hole diameter, excavation plan, and support plan (Tyagi et al, 2018;Antão et al, 2021;Kumar and Sahoo, 2021;Shiau and Al-Asadi, 2022). These research results have greatly enriched and improved the knowledge of tunnel construction theory and practice.…”

Section: Introductionmentioning

confidence: 99%

The construction stability of large section tunnel considering the deterioration of clay mechanical properties

Huang

Liu

Ma³

et al. 2023

Front. Mater.

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The stability of large-section clay tunnels is closely related to the mechanical behavior of the surrounding rock. The mechanical behavior of the surrounding rock is characterized by the coupled response of the physico-mechanical properties of the clay material and the tunnel construction conditions. Therefore, this paper proposes a numerical experimental study based on the response surface method to quantitatively link the stability of large-section clay tunnels with construction factors. It will provide a basis for quantitatively guiding the tunnel construction plan adjustment to ensure its stability. Firstly, the tunnel stability reserve is evaluated by considering the deterioration of physico-mechanical properties of clay surrounding rocks, and the relationship between the tunnel stability index and construction factors is established according to Taylor’s theorem. Secondly, the response surface method and the steepest ascent method are used to find the optimal fitting relationship between the tunnel stability reserve factor and tunnel construction factors. Finally, the analysis of a tunnel application shows that (a) the stability evaluation considering the deterioration of physical and mechanical properties of clay is well representative; (b) the “curved” region of the response of the tunnel stability reserve factor can be effectively determined by the steepest slope method; (c) for the “curved” region, a second-order response surface is more appropriate. This research will reveal the coupling relationship between tunnel stability, physico-mechanical properties of clay, and tunnel construction conditions, which will contribute to the development of intelligent tunnel construction.

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Three-dimensional Limit Analysis using the Extended-Matsuoka–Nakai yield criterion

Silva

Antão

2023

Computers and Geotechnics

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Upper and lower bounds for three-dimensional undrained stability of shallow tunnels

Cited by 6 publications

References 33 publications

The stability evaluation of clay tunnels via the non-linear deterioration of physical and mechanical properties of surrounding rocks

The stability evaluation of clay tunnels via the non-linear deterioration of physical and mechanical properties of surrounding rocks

The construction stability of large section tunnel considering the deterioration of clay mechanical properties

Three-dimensional Limit Analysis using the Extended-Matsuoka–Nakai yield criterion

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