Dynamic response characteristics and failure mode of a bias loess tunnel using a shaking table model test

Sun, Weiyu; Yan, Songhong; Ma, Qinguo; Liang, Qingzhong; Ou, Erfeng; Xiaoping, Cao; Wang, Jinghe; Luo, Xiaoxiao

doi:10.1016/j.trgeo.2021.100659

Cited by 22 publications

(5 citation statements)

References 22 publications

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“…The fast Lagrandian analysis of continua in 3 dimensions (FLAC 3D) numerical model (Yang et al, 2013;Xiao et al, 2014;Xiao et al, 2016;Yang et al, 2020) and model tests (He et al, 2015;Lei et al, 2016) were employed to explore the cracking behaviors and mechanisms of shallow bias tunnels. Furthermore, shaking table model tests were conducted to explore the dynamic responses, damage mechanisms, and failure modes of shallow-buried bias tunnels subjected to dynamic loads (Xu et al, 2016;Wang et al, 2017;Jiang et al, 2018;Wang et al, 2018;Liu et al, 2019;Sun et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Mechanical behaviors of surrounding rock and supporting structure of shallow-buried unsymmetrical pressure tunnel crossing soil–rock interface

Zhang

Wang

et al. 2023

Front. Earth Sci.

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Shallow bias tunnels are sensitive at the entrance section, where the existence of soil–rock interface (SRI) results in more complex deformation of surrounding rock and supporting structure. This study investigates the mechanical properties of surrounding rock and supporting structure of a shallow-buried bias tunnel crossing the soil–rock interface by a combination of model tests and numerical simulations. A shallow-buried biased tunnel with significant cracking at its entrance section is selected in southwest China. The plastic zone distribution, deformation, and pressure of surrounding rock, as well as the stress and deformation of supporting structure, are analyzed under different conditions with the tunnel vault, arch haunch, arch spring, and wall foot crossing the soil–rock interface. The test and numerical results show that the internal force of the lining structure is the largest at the left arch haunch and the right arch spring, with cracks occurring in the project. The surrounding rock and supporting structure are most prominently influenced by the arch haunch and arch spring crossing the soil–rock interface among different positions of the tunnel. The supporting structure is subjected to stress in three modes: there is mainly shearing when the tunnel vault passes through the soil–rock interface, extrusion and shearing co-exist when the tunnel arch haunch and arch spring pass through the soil–rock interface, and extrusion is dominant when the tunnel wall foot passes through the soil–rock interface. Inserting grouting steel pipes perpendicular to the soil–rock interface on the deep-buried side of the tunnel can effectively control the deformation of surrounding rock and the stress of supporting structure.

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Section: Introductionmentioning

confidence: 99%

Mechanical behaviors of surrounding rock and supporting structure of shallow-buried unsymmetrical pressure tunnel crossing soil–rock interface

Zhang

Wang

et al. 2023

Front. Earth Sci.

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“…Kaya et al [22] performed kinematic, limited equilibrium, and numerical stability analyses to investigate the mechanism of a failure of rock slope with a tunnel. Sun et al [23] conducted a 1 : 25 large-scale shaking table model test on the bias loess tunnel, and the seismic responses and failure modes of the loess slope and bias tunnel were analyzed. Te interaction between the tunnel structure and loess slope was studied.…”

Section: Introductionmentioning

confidence: 99%

Long-Term Effect Analysis of a High Slope with Tunnel Structure Based on Three-Dimensional Mesh Reconstruction

Shi

Yuan

Che

et al. 2023

Advances in Civil Engineering

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The instability of high rock slopes with tunnel structures increases under the effects of earthquakes and rainfall. Limited studies have been conducted on the long-term effect analysis of high rock slopes with tunnels. Field electrical measurements on rock slopes have been conducted to study the response of high rock slopes with large cross-section tunnels during rainfall and seismic loading. The material threshold was determined using the resistivity probability density statistical method, and a three-dimensional geological visualization model was obtained. A three-dimensional mesh reconstruction method consisting of material segmentation, cluster filtering, mesh generation, and material attribute mapping modules was proposed. The three-dimensional model of high-cutting rock slope was reconstructed, and the three-dimensional finite element model of the rock slope with tunnel was obtained. The response analysis of the slope was performed during rainfall and seismic loading by employing the El-Centro wave. The results demonstrated that plastic strain was generated in the fracture zone of the upper part of the tunnel during rainfall, and the strain value was 8.135 × 10−4. In the subsequent stages, it had a tendency to expand into the tunnel under continuous rainfall. The maximum principal strain was 3.324 × 10−2 under the effect of a strong earthquake. A large strain was generated in the fracture zone at the upper part of the tunnel. It had a tendency to expand under long-term load, which significantly affected the safety of the tunnel.

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“…However, it is usually difficult for countries such as Japan and China to develop underground tunnel projects, as they will undergo adverse geological conditions, such as earthquakes, liquefaction, and creep [4][5][6][7]. As a result, the damage to tunnels due to the seismic action will include tunnel lining deformation, tunnel entrance crack, and other types of damages [8][9][10][11][12][13][14]. The actual mechanism of the soil and rock are far more complicated than the understanding [15].…”

Section: Introductionmentioning

confidence: 99%

Preliminary Mechanical Evaluation of Grouting Concrete as a Protective Layer for Tunnelling

Wan

Huang³

et al. 2023

Materials

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The aim of this study is to introduce a protective layer to safeguard tunnel structures. In practice, one viable approach to create this protective layer between the tunnel structure and surrounding rocks is to pump the material during tunnel construction. The primary components of the proposed material are porous sand, rubber, and cement. Static and dynamic experiments were conducted to assess the unconfined compressive strength (UCS), flexural stiffness, and compaction resistance at various mixing ratios. The results indicate that the addition of porous sand decreases the UCS compared to the solid sand under similar mixing conditions. The addition of rubber offers the elasticity, thereby enhancing the compaction resistance. However, increasing the rubber content compromises UCS. Furthermore, this study presents a linear equation to predict the 7-day UCS, which can be used as a rapid estimation for UCS, flexural stiffness, and compaction resistance of the proposed material. It is important to note that this study only investigates the fundamental mechanical properties of the proposed material, and further comprehensive research is necessary to fully understand its workability, durability, and other behaviour before practical application.

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Dynamic response characteristics and failure mode of a bias loess tunnel using a shaking table model test

Cited by 22 publications

References 22 publications

Mechanical behaviors of surrounding rock and supporting structure of shallow-buried unsymmetrical pressure tunnel crossing soil–rock interface

Mechanical behaviors of surrounding rock and supporting structure of shallow-buried unsymmetrical pressure tunnel crossing soil–rock interface

Long-Term Effect Analysis of a High Slope with Tunnel Structure Based on Three-Dimensional Mesh Reconstruction

Preliminary Mechanical Evaluation of Grouting Concrete as a Protective Layer for Tunnelling

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