Analysis of Tunnel Lining Failure Mechanism under the Action of Active Fault

Ma, Sujian; Zhang, Liang; Dong, Wei; Tan, Xinrong; Li, Sifeng; Liu, Yang

doi:10.1155/2021/9918021

Cited by 9 publications

(8 citation statements)

References 8 publications

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“…It was possible to obtain a certain amount of shear stress before the two objects slipped relative to each other. A relative slip begins if the shear stress exceeds this value [9] . Usually, the coefficient of friction takes the value µ = tanφ, which is about 0.2 (φ is the angle of internal friction in the surrounding rock) [10] .…”

Section: Friction Surface Propertiesmentioning

confidence: 99%

“…Chermahini and Tahghighi [7] developed a two-dimensional numerical model with homogeneous stratigraphy using the Sabzkouh tunnel as an example and empirically applied a fault dislocation of 4m to the footwall boundary of the tunnel. Existing studies have mainly set the direction of the dislocation of the hanging wall parallel to the fault plane when simulating the reverse fault displacement [5][6][7][8][9][10] . However, the displacement pattern of reverse fault dislocation is not caused by the occurrence of dislocation of the hanging wall parallel to the fault plane but is coupled with the extrusion of the footwall by the peripheral rocks and the uplift of the hanging wall and its absolute displacement angle is not necessarily strictly parallel to the fault plane [11] .…”

Section: Introductionmentioning

confidence: 99%

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Effects of Reverse Fault Dislocation Application Method for Tunnelling Through Active Faults

Huang,

Li,

Chen

2024

IOP Conf. Ser.: Earth Environ. Sci.

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Active faults seriously threaten the structural integrity of mountain tunnels in seismic zones, and reverse faults are the most hazardous. A tunnel project in the western region was used as a reference to analyze the damage mechanism of tunnels under different modes of reverse fault displacement. The ABAQUS finite element analysis software was employed for the numerical simulation, and a quasi-static method was adopted to analyze the displacement and stress response patterns of the tunnel structure traversing the fault under three typical modes of reverse fault displacement. This led to deriving the tunnel structure’s longitudinal damage modes and impact zones based on reverse fault displacement. The study revealed that the damage modes of the tunnel under different fault displacement modes varied, which was reflected in the different degrees of shear and compression. Regardless of the fault displacement mode, the tunnel structure located within the fault fracture zone was severely damaged, with the most severe damage occurring at the interface between the fixed plate and the fault displacement section. Therefore, in the design, special attention should be paid to the displacement resistance performance of the dangerous sections of the tunnel. The research results provide significant reference and guidance for similar projects.

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Section: Friction Surface Propertiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effects of Reverse Fault Dislocation Application Method for Tunnelling Through Active Faults

Huang,

Li,

Chen

2024

IOP Conf. Ser.: Earth Environ. Sci.

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“…Similarly, Han and Li [14] studied the influence of the segment length, section shape, and lining thickness of articulated lining on the antidislocation effect of the tunnel by numerical simulation method, which takes the railway tunnel crossing the reverse fault as the background. What is more, Ma et al [15] established a 3D finite element model based on an actual tunnel in southwest China and revealed the fault dislocation failure mechanism of the tunnel from the parameters of tunnel lining deformation, stress distribution, and plastic zone distribution. The above research results are mostly based on the analysis of the axial stress and strain distribution of the tunnel and the deformation law of the tunnel, and less attention is paid to the damage evolution law of the tunnel.…”

Section: Introductionmentioning

confidence: 99%

Study on Damage Evolution of Tunnel Lining under Strike-Slip Fault Movements

Yan

Sun

et al. 2023

Geofluids

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For the purpose of investigating the damage mechanism and failure characteristics of tunnel lining under the strike-slip fault movements, a three-dimensional elastoplastic finite element model was established in the present study including a railway tunnel across an active strike-slip fault. With the assistance of this numerical model, the tensile and compressive damage, plastic strain development process, and shear failure of the secondary lining at different fault plane positions were analyzed, and further, the damage laws of the secondary lining at different fault displacement and tunnel-fault intersection angles were summarized. The simulation results showed that when the maximum imposed fault displacement is 30 cm, the most unfavorable fault plane appears at the junction between the moving block and the fracture zone, and serious tensile cracks and shear failures occur on each fault rupture plane. Besides, the maximum plastic strain and compressive damage are distributed in the vault and invert. In addition, with the increase of the fault displacement, the axial strain of the secondary lining increases as well, of which the main part shows the tensile strain. Interestingly, with the decrease of the crossing angle, the axial strain gradually changes from the tensile strain to the compressive strain, which is consistent with the direction of the fault angle. Furthermore, the tensile and compressive damage of the secondary lining increases with the increase of movement distance. At the same time, the tensile damage along the tunnel ring develops, and the compressive damage propagates mainly in tunnel vault and invert. With the decrease of the crossing angle, the degree of the tensile damage in the lining reduces, as well as its range. The compressive damage area of the lining develops from the vault and inverted arch to the tunnel wall on both sides, which has a trend of penetrating the side walls on both sides. The distribution area and maximum value of the overall lining damage indices in tensile (OLDT) and overall lining damage indices in compressive (OLDC) increase with the increase of fault movement distance. With the decrease of the crossing angle, the distribution range and maximum value of OLDT decrease, and the distribution range of OLDC increases, while the maximum value basically remains the same. The research results of the present work can provide reference for the antidislocation design of railway tunnels crossing strike-slip faults.

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“…Extensive research has been carried out on fault-crossing tunnels, including analysis models, experiments, and numerical simulation. Key influencing factors of fault zones studied have included the fault zone width, soil properties, and the intersection angle between tunnel axis and fault zone [7,8]. Tunnelling research subjects have encompassed surrounding rock deformation, internal forces, tunnel lining deformation, and the advantages and drawbacks of a range of construction measures [9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Extent of Deformation Range and Failure Characteristics of Rocks Surrounding a Tunnel Crossing Fault Zone Based on FDEM

Xiaoxiong

Wang

et al. 2022

Advances in Civil Engineering

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The combined finite-discrete element method (FDEM) and laboratory test were selected to study the extent of deformation range and time-dependent deformation of surrounding rock during tunnel excavation without support in a fault-crossing tunnel project. FDEM was found to accurately reflect the deformation and failure characteristics of different surrounding rocks during stress release, including conjugate shear and extrusion. Analysis of the results showed that the disturbance range of surrounding rocks could reach 1.5 to 2.5 times the tunnel diameter when crossing the fault zone. The rock surrounding the tunnel was found to incur significant conjugate shear deformation and extrusion deformation: conjugate shear deformation was identified as dominant in the deep rock mass, whereas extrusion deformation prevailed in the rock mass near the cave wall. The conjugate shear distribution was represented as a spiral line of deformation circling around the tunnel section, with an elliptical main deformation zone with its long axis parallel to the fault plane. Compared with the findings when crossing the intact rock mass, the deformation of the surrounding rocks when crossing the fault zone was characterized by rapid development, deep expansion area, and large deformation. The study conclusions were that supporting bolts and steel arches should be implemented timely when excavating fault zones and that both lithology and optimal construction timing were essential considerations in determining the length of the supporting bolts.

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Analysis of Tunnel Lining Failure Mechanism under the Action of Active Fault

Cited by 9 publications

References 8 publications

Effects of Reverse Fault Dislocation Application Method for Tunnelling Through Active Faults

Effects of Reverse Fault Dislocation Application Method for Tunnelling Through Active Faults

Study on Damage Evolution of Tunnel Lining under Strike-Slip Fault Movements

Analysis of Extent of Deformation Range and Failure Characteristics of Rocks Surrounding a Tunnel Crossing Fault Zone Based on FDEM

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