Investigating the impacts of reinforcement range and grouting timing on grouting reinforcement effectiveness for tunnels in fault rupture zones using a numerical manifold method

Engineering Geology, Journal Year: 2024, Volume and Issue: unknown, P. 107423 - 107423

Published: Jan. 1, 2024

Language: Английский

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Arching effect in slopes under excavation: Classification and features

Engineering Geology, Journal Year: 2024, Volume and Issue: 337, P. 107563 - 107563

Published: May 24, 2024

Language: Английский

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Intelligent calibration method for microscopic parameters of soil‒rock mixtures based on measured landslide accumulation morphology

Computer Methods in Applied Mechanics and Engineering, Journal Year: 2024, Volume and Issue: 422, P. 116835 - 116835

Published: Feb. 15, 2024

Language: Английский

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Insight into the crack characteristics and mechanisms of retrogressive slope failures: A large-scale model test

Engineering Geology, Journal Year: 2023, Volume and Issue: 327, P. 107360 - 107360

Published: Nov. 10, 2023

Language: Английский

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3D tunnel reconstruction and visualization through multi-smartphone photogrammetry

Measurement, Journal Year: 2023, Volume and Issue: 223, P. 113764 - 113764

Published: Oct. 27, 2023

Language: Английский

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Investigation of granular flow run-out behavior under dilative and compressive Coriolis conditions using DEM simulation

Canadian Geotechnical Journal, Journal Year: 2024, Volume and Issue: 61(11), P. 2434 - 2449

Published: Feb. 21, 2024

Centrifuge modeling allows granular flows to be simulated under stresses characteristic of full-scale flows, while maintaining repeatability. However, the impact Coriolis effect on run-out behavior dry is not fully understood. In this study, using discrete element method (DEM), we conducted simulations flow both with and without (dilative compressive) conditions analyze mobility, structure, interaction. For unsteady dilative force increased moving distance centroid by 60%–70% maximum kinetic energy 5%–17%, whereas those parameters were reduced 30% 2%–9%, respectively, compressive conditions. Results showed that selecting a lower centrifugal acceleration reducing rotational angular velocity in physical ineffective for realizing weaker effect. This study established larger centrifuge could mitigate effect, but outcome became less notable as radius increased. Additionally, suggest preliminary relation used correct results experimental final obtained geotechnical centrifuge.

Language: Английский

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Centrifuge and DEM investigation of dry granular impacts: Effect of granular volume under high-speed impact conditions

Landslides, Journal Year: 2024, Volume and Issue: 21(6), P. 1439 - 1459

Published: Feb. 26, 2024

Language: Английский

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Centrifuge modelling of dry granular run-out processes under deflective Coriolis condition

Journal of Rock Mechanics and Geotechnical Engineering, Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 1, 2024

Coriolis effects, encompassing the dilative, compressive, and deflective manifestations, constitute pivotal considerations in centrifugal modelling of high-speed granular run-out processes. Notably, under condition, velocity component parallel to rotational axis exerts no influence on magnitude acceleration. This circumstance implies a potential mitigation force's impact. Regrettably, extant investigations predominantly emphasize dilative compressive largely neglecting pragmatic import condition. In pursuit this gap, series discrete element method (DEM) simulations have been conducted scrutinize feasibility for dry processes conditions. The findings concerning effect reveal consistent rise distance by 2%–16%, modest increase bulk flow 4%, slight elevation average depth more than 25%. These alterations display smaller dependence specific testing conditions due undergoing dual deflections opposing directions. underscores significance utility anticipated reduction error predicting final is substantial, potentially reaching 150% improvement compared predictions made Therefore, condition advised when main concern. To mitigate impact acceleration, greater initial height column recommended, with height/width ratio exceeding 1, as basal friction material plays crucial role mitigating effect. For transverse-uniform properties, width should be large possible.

Language: Английский

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Velocity effect on the impact dynamics of high-speed granular avalanches based on centrifuge modeling and DEM simulations

Powder Technology, Journal Year: 2023, Volume and Issue: 431, P. 119083 - 119083

Published: Oct. 22, 2023

Language: Английский

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Debris–slit interaction considering the particle behavior controls the barrier performance of slit structure retaining dry granular flows

Environmental Earth Sciences, Journal Year: 2024, Volume and Issue: 83(3)

Published: Jan. 29, 2024

Language: Английский

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