Assessing clogging potential and optimizing driving parameter of slurry shield tunneling in clay stratum assisted with CFD-DEM modeling

Yang, Yi; Li, Xinggao; Li, H.F.; Guo, Yidong; Fang, Yingran

doi:10.1016/j.undsp.2023.05.012

Cited by 6 publications

(4 citation statements)

References 40 publications

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“…In addition, the comparative analysis of the three pile lengths shows that the horizontal displacement value and the distribution of the horizontal displacement of the three pile lengths are basically the same near the buried depth of the tunnel [ 30 ]. However, the horizontal displacement at the top of pile shows greater difference with the increase of the distance between tunnel and pile foundation.…”

Section: Resultsmentioning

confidence: 99%

“…Short piles (pile length H) are mainly characterized by inclination of the pile base and therefore axial stresses are low. a comparative analysis of Fig 11(B) to 11(C) also shows that as the distance between pile foundation and tunnel increases, the axial stress difference on both sides of pile foundation also gradually decreases, which also indicates that the influence of tunnel construction on pile foundation is gradually decreasing [ 30 ].…”

Section: Resultsmentioning

confidence: 99%

“…The simulation results show that the numerical model based on DEM-FDM coupling can reasonably simulate tunnel shield tunneling under the condition of TBM operation, and has good robustness. Consequently, more and more research has based on DEM-FDM coupling method [ 28 – 30 ]. Qu et al [ 31 ] established a computational model using the coupled DEM-FDM method and realized the simulation of the whole process of shield construction.…”

Section: Introductionmentioning

confidence: 99%

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Study on deformation of tunnel pile foundation based on discrete element method and finite difference method

Zhao,

Zhang,

Dai

2024

PLoS ONE

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The deformation of pile caused by tunnel excavation will weaken the bearing capacity of the foundation. In order to investigate the deformation response of pile induced by the construction of three-hole small spacing tunnel, the DEM-FDM (discrete element method and finite difference method) coupling numerical simulation method were used to simulate the deformation process of pile during tunnel excavation. This paper probed into the deformation response of pile by three factors: the length of pile, the pile-tunnel spacing, and the three-hole tunnel construction. The results showed that, as the pile-tunnel spacing decreases, the incremental horizontal displacement of the pile top became more significant when the three-hole tunnel was excavated. The excavation resulting in four zones of horizontal displacement concentration. The prominent locations were mainly concentrated on both sides of the tunnel and the ground directly above the tunnel. The research findings of this study can provide insights and references for the design and construction of shield tunneling under passing piles.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Study on deformation of tunnel pile foundation based on discrete element method and finite difference method

Zhao,

Zhang,

Dai

2024

PLoS ONE

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“…The motion behavior of gangue slurry in the pipeline results from the interaction between gangue particles and slurry [14,21,22]. The coupled CFD-DEM method is used to solve the interaction between particles and fluid [23][24][25][26][27][28], which is very suitable for simulating the flow process of gangue slurry in the pipeline [13,19]. The CFD-DEM method has been utilized in various applications involving the coupling of fluids and solids in geotechnical engineering [29,30].…”

Section: Introductionmentioning

confidence: 99%

Numerical Study of Gangue Slurry Deposition Behavior in Pipelines Considering Viscosity Change

Gu,

Wang,

et al. 2024

Minerals

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Pipeline conveying is a crucial method for realizing gangue slurry filling. In order to avoid the blockage of gangue slurry in pipeline conveying, it is necessary to clarify the deposition behavior of gangue particles in the pipeline. This paper analyzes coal gangue’s microstructure and mineral composition in the Zhaozhuang No. 2 coal mine through electron microscope scanning and X-ray diffraction tests. We studied the viscosity characteristics of gangue slurry at different mass concentrations and particle sizes and analyzed the change rule of viscosity of gangue slurry with time. Based on determining the nature of the slurry material, a simulation analysis of the deposition behavior of the gangue slurry in a pipeline was carried out using the coupled fluid dynamics–discrete element (CFD-DEM) method. The results show that gangue slurry with a particle size larger than 1.0 mm is likely to lead to the blockage of the pipeline. A small increase in viscosity will promote a uniform distribution of particles inside the pipeline. The deposition behavior of particles is jointly influenced by gravity, fluid interaction force, inter-particle force, and the interaction between particles and the pipeline surface. The research results can be used as a reference for the design and study of gangue slurry grouting systems.

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Failure evolution and mechanism of ground collapse due to exfiltration of shallowly buried water pipeline

Liu,

Wang,

Tan

et al. 2024

Engineering Failure Analysis

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Assessing clogging potential and optimizing driving parameter of slurry shield tunneling in clay stratum assisted with CFD-DEM modeling

Cited by 6 publications

References 40 publications

Study on deformation of tunnel pile foundation based on discrete element method and finite difference method

Study on deformation of tunnel pile foundation based on discrete element method and finite difference method

Numerical Study of Gangue Slurry Deposition Behavior in Pipelines Considering Viscosity Change

Failure evolution and mechanism of ground collapse due to exfiltration of shallowly buried water pipeline

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