Simulation of screening characterization of double-deck vibrating screen of slurry TBM tunnelling using integrated CFD-DEM-FEM

Tunnelling and Underground Space Technology, Journal Year: 2025, Volume and Issue: 158, P. 106399 - 106399

Published: Jan. 21, 2025

Language: Английский

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Modeling of reinforced-concrete cutting with shield rippers using FEM-DEM-coupling method

International Journal of Mechanical Sciences, Journal Year: 2024, Volume and Issue: 282, P. 109619 - 109619

Published: Aug. 2, 2024

Language: Английский

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Assessment of slurry chamber clogging alleviation during ultra-large-diameter slurry tunnel boring machine tunneling in hard-rock using computational fluid dynamics-discrete element method: A case study

Journal of Rock Mechanics and Geotechnical Engineering, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Language: Английский

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Application of natural materials containing carbohydrate polymers in rheological modification and fluid loss control of water-based drilling fluids: A review

Carbohydrate Polymers, Journal Year: 2024, Volume and Issue: 348, P. 122928 - 122928

Published: Nov. 1, 2024

Language: Английский

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Development and infiltration behavior of environmental polymer slurry for slurry shield tunneling

Construction and Building Materials, Journal Year: 2025, Volume and Issue: 460, P. 139781 - 139781

Published: Jan. 1, 2025

Language: Английский

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Experimental Research on the Propagation Mode of 3D Hollow Cracks and Material Strength Characteristics Under Hydro-Mechanical Coupling

Journal of Marine Science and Engineering, Journal Year: 2025, Volume and Issue: 13(2), P. 259 - 259

Published: Jan. 30, 2025

The fracture evolution and the strength characteristics of a jointed rock mass under hydro-mechanical coupling are key issues that affect safety stability underground engineering. In this study, kind transparent rock-like resin was adopted to investigate crack initiation propagation modes 3D flaw coupling. influences water pressure dip angle on properties specimen were analyzed. experiment results indicated modes, presented two types modes: low-water-pressure type high-water-pressure type. increase in had significant promoting effect propagation, which changed overall failure mode specimen. With angle, critical growth length wing decreased moment fin-like showed hysteretic tendency. stress thresholds. When lower than threshold, increased slightly gradually with pressure. Once threshold exceeded, both significantly first decreasing then increasing lowest found for containing 45° flaw, while highest 75° flaw. This study helps deepen understanding mechanism engineering has certain theoretical applied value design construction safety.

Language: Английский

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Vibration Safety Threshold and Control Technology for Blasting to Prevent Seawater Intrusion in Coastal Tunnel Sections Near Faults

Journal of Marine Science and Engineering, Journal Year: 2024, Volume and Issue: 12(9), P. 1646 - 1646

Published: Sept. 14, 2024

Coastal underground engineering projects are prone to seawater intrusion during blasting operations, posing significant risks the safety of construction personnel and structural integrity projects. To ensure operations in areas at risk intrusion, this study focuses on a section coastal tunnel that is such intrusion. Using fracture mechanics theory silo analysis methods, minimum safe distance between workface fault prevent determined. Numerical simulations employed analyze dynamic response surrounding rock attenuation vibrations as excavation progresses near fault-controlled zone. This also explores impact stability. By employing regression analysis, establishes quantitative relationships amount explosive used peak particle velocity (PPV) different distances, well range damage PPV various distances. allows for determination threshold area. The accuracy computational model validated using field-measured data. Finally, an optimized design strategy based electronic detonator initiation proposed control area, ensuring safety. provides theoretical technical references achieving efficient

Language: Английский

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Analytical Model of Mechanical Responses of Circular Tunnels Considering Rheological Behavior of Surrounding Rock and Functionally Graded Lining

Applied Sciences, Journal Year: 2024, Volume and Issue: 14(17), P. 7434 - 7434

Published: Aug. 23, 2024

The rock–lining interaction significantly affects the stability and safety of a tunnel in service. In this study, mechanical model is proposed to explore under hydrostatic pressure. takes into account alterable property (such as elastic modulus) lining rheological rock mass, which may be subjected inner surface pressure along radial direction highway tunnel. modulus assumed power function radius. analytical solutions are first verified by comparison with existing corresponding results obtained numerical simulation. Then, systematic parametric investigations carried out analyze influence main parameters on deformation interface normalized supporting provided lining. research conclusions study can offer some valuable references for evaluation

Language: Английский

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Development and experiment study on seawater-based slurry for subsea tunnels in slurry shield tunneling

Construction and Building Materials, Journal Year: 2024, Volume and Issue: 451, P. 138646 - 138646

Published: Oct. 28, 2024

Language: Английский

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Characterization and modification mechanism of recycled silty clay slurry as a shield slag conditioner: macroscopic, mesoscopic, and microscopic multiscale analyses

Case Studies in Construction Materials, Journal Year: 2024, Volume and Issue: unknown, P. e04158 - e04158

Published: Dec. 1, 2024

Language: Английский

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