Centrifuge testing and numerical modeling of tunnel face stability considering longitudinal slope angle and steady state seepage in soft clay

Weng, Xiaolin; Sun, Yongkui; Yan, Binhua; Niu, Haoshuang; Lin, Rongan; Zhou, Shangqi

doi:10.1016/j.tust.2020.103406

Cited by 66 publications

(15 citation statements)

References 31 publications

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“…However, the electric heat tracing needs a lot of energy resources to ensure thermal efficiency, which slightly deviates from the increasingly demanding requests from the perspective of energy saving of constructions. e thermal insulation doors are not suitable for tunnels with large traffic volume, resulting in sizable heat loss owing to incessant opening and closing [219,220]. Hence, using FC as liner structure and insulation material is helpful to simplify construction process and reduce material costs.…”

Section: 21mentioning

confidence: 99%

Foam Concrete: A State‐of‐the‐Art and State‐of‐the‐Practice Review

Wang

et al. 2020

Advances in Materials Science and Engineering

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Foam concrete (FC) has the potential of being an alternative to ordinary concrete, as it reduces dead loads on the structure and foundation, contributes to energy conservation, and lowers the cost of production and labor cost during the construction and transportation. The paper reports a state-of-the-art review of foam concrete in terms of its components, manufacturing and material properties like drying shrinkage, compressive strength, stability and pore structure, etc. In view of the significance of the FC in engineering construction, it also includes a state-of-the-practice review of foam concrete in tunnel and underground engineering. Some shortcomings and technical limitations as well as emerging direction for performance enhancement of FC are also discussed. Current review concludes that the long-term performance and enhancement-associated properties need to be deeply investigated. This study can help alleviate consumer concerns and further encourage the wider application of FC in civil engineering.

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Section: 21mentioning

confidence: 99%

Foam Concrete: A State‐of‐the‐Art and State‐of‐the‐Practice Review

Wang

et al. 2020

Advances in Materials Science and Engineering

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“…Tunnel stability research work has made significant progress after years of development. The underground projects, including tunnels, are faced with the difficulties posed by construction in high-risk environments where geological engineering problems are frequent at the early stage of tunnel construction (Rojat et al, 2015;Weng et al, 2020;Yertutanol et al, 2020;Xue et al, 2022). Traffic tunnels are also trending toward larger cross-sections, and the requirement for faster and better construction periods and the engineers need to pay more attention to the role of construction solutions in securing tunnel stability.…”

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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“…The key to controlling the excavation face stability is to provide moderate support pressure for the excavation face [10][11][12][13]. A number of experts and scholars have studied the limit support pressure of the shield tunnelling face via theoretical analysis, laboratory tests and numerical simulation [14][15][16][17][18]. Regarding the theoretical analysis, the limit equilibrium method is an essential theory for investigating the limit support pressure of the excavation face.…”

Section: Introductionmentioning

confidence: 99%

Intelligent decision method for stability assessment of shield tunnel based on multi-objective data mining

Xue

et al. 2023

Phil. Trans. R. Soc. A.

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Due to improper operation of the shield construction process and unknown geological surveys, shield construction faces many risks in passing through complex strata, among which the excavation face instability is the most serious, potentially leading to disastrous accidents. To address these issues, this research focuses on the limit support pressure and the excavation face stability in the soil when crossing the Yangtze River. First, an analytical formula for the limit support pressure of the excavation face is established through the wedge model. The support safety coefficient is used to assess the excavation face stability quantitatively. Then the rough set algorithm is used to analyse the sensitivity of each index to establish the reduced evaluation index system for the excavation face stability. The back propagation (BP) neural network is used to train the learning data, and a neural network evaluation model with a prediction error of 5.7675 × 10 −4 is established. The prediction performance of BP is verified by comparison with the TOPSIS prediction model and the cloud model. The evaluation method proposed in this paper provides an essential reference for evaluating the underwater shield tunnel excavation face stability. This article is part of the theme issue ‘Artificial intelligence in failure analysis of transportation infrastructure and materials’.

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Centrifuge testing and numerical modeling of tunnel face stability considering longitudinal slope angle and steady state seepage in soft clay

Cited by 66 publications

References 31 publications

Foam Concrete: A State‐of‐the‐Art and State‐of‐the‐Practice Review

Foam Concrete: A State‐of‐the‐Art and State‐of‐the‐Practice Review

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

Intelligent decision method for stability assessment of shield tunnel based on multi-objective data mining

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