Research progress and prospect of frozen soil engineering disasters

Cold Regions Science and Technology, Journal Year: 2023, Volume and Issue: 212, P. 103901 - 103901

Published: May 20, 2023

Language: Английский

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A thermo-poromechanical model for simulating freeze–thaw actions in unsaturated soils

Advances in Water Resources, Journal Year: 2024, Volume and Issue: 184, P. 104624 - 104624

Published: Jan. 21, 2024

Language: Английский

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State of the Art of Coupled Thermo–hydro-Mechanical–Chemical Modelling for Frozen Soils

Archives of Computational Methods in Engineering, Journal Year: 2024, Volume and Issue: unknown

Published: July 29, 2024

Abstract Numerous studies have investigated the coupled multi-field processes in frozen soils, focusing on variation soils and addressing influences of climate change, hydrological processes, ecosystems cold regions. The investigation multi-physics field has emerged as a prominent research area, leading to significant advancements coupling models simulation solvers. However, substantial differences remain among various due insufficient observations in-depth understanding processes. Therefore, this study comprehensively reviews latest process numerical methods, including thermo-hydraulic (TH) coupling, thermo-mechanical (TM) hydro-mechanical (HM) thermo–hydro-mechanical (THM) thermo–hydro-chemical (THC) thermo–hydro-mechanical–chemical (THMC) coupling. Furthermore, primary methods are summarised, continuum mechanics method, discrete or discontinuous simulators specifically designed for heat mass transfer modelling. Finally, outlines critical findings proposes future directions multi-physical modelling soils. This provides theoretical basis mechanism analyses practical engineering applications, contributing advancement management

Language: Английский

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Non-local modelling of freezing and thawing of unsaturated soils

Advances in Water Resources, Journal Year: 2024, Volume and Issue: 184, P. 104614 - 104614

Published: Jan. 5, 2024

A large part of the earth's surface is covered by seasonally or permanently frozen soils. Considering negative impact climate change, future development such regions can be underpinned mathematical methods for accurate analysis heat and moisture transport in freezing thawing Reported this paper a novel non-local formulation water unsaturated The uses bond-based peridynamics (PD) consists set integral-difference formulations energy mass conservation. Specific features freezing/thawing soils are incorporated combination van Genuthcen Clausius-Clapeyron relations. Computational results compared with four sets laboratory experiments to demonstrate efficiency developed approach. model used analyse effect flow on transfer during permafrost Further, it applied modelling change effects, construction coupled physically justified models frost heave.

Language: Английский

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Applicability of the principle of effective stress in cold regions geotechnical engineering

Cold Regions Science and Technology, Journal Year: 2024, Volume and Issue: 219, P. 104129 - 104129

Published: Jan. 22, 2024

Language: Английский

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Research on hydro-thermal coupling model of canal foundation soil based on particle grading curve predicting soil-water characteristic curve

Case Studies in Thermal Engineering, Journal Year: 2024, Volume and Issue: 56, P. 104270 - 104270

Published: March 24, 2024

Hydro-thermal coupling is the essence of freeze-thaw process, and theoretical studies this coupled process have been hot topics in field frozen soil. Darcy's law unsaturated soil water flow, heat conduction theory, relative saturation solid-liquid ratio are based on paper. According to principle that cumulative curve particle gradation canal foundation similar soil-water properties. A characteristic derived using curve. VG model then used fit curves obtain soil's hydraulic parameters, established hydro-thermal modified reflect evolution more objectively. closed system one-way freezing test method verify feasibility proposed part. The results show optimal parameters subsoil a = 0.06, n 1.2, m 0.17, temperature fields obtained from simulation good agreement with measured data, showing utility predicting parameters. Analysis multi-field interaction mechanism dynamic during thawing. This has great importance for preventing damage canals protecting agricultural safety.

Language: Английский

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Study on the formation mechanism and preventive measure of pot cover effect for subgrade in seasonal frozen soil area under freeze–thaw cycles

International Journal for Numerical and Analytical Methods in Geomechanics, Journal Year: 2024, Volume and Issue: 48(9), P. 2408 - 2429

Published: April 9, 2024

Abstract The presence of an impervious cover layer inhibits the free evaporation moisture in soil during seasonal freeze–thaw cycles, leading to a phenomenon known as pot effect. This can result severe frost heave issues airport runways, highway subgrades, railway and other similar infrastructure. In this study, disease investigation was conducted at gas transmission station situated area with seasonally frozen soil. Meanwhile, causes accumulation lower part concrete pavement slabs were analyzed. A coupled water–vapor–heat model for unsaturated is then established analyze formation mechanism effect subgrade. Finally, preventive on migration results indicate that significant beneath station, resulting content increase 5%–35%. During freezing period, vapor shallow migrates upward, while liquid water remains unchanged. melting both migrate downward. laying prevent When placed front (0°C), prevention best.

Language: Английский

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Research and monitoring on the water-heat-gas behavior and frost heaving characteristics of coarse-grained fillers under unidirectional freezing conditions

Engineering Geology, Journal Year: 2025, Volume and Issue: unknown, P. 107915 - 107915

Published: Jan. 1, 2025

Language: Английский

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Research on the analytical methods for water-heat coupling in the frost-thaw process of canal slopes under saturated conditions

Research in Cold and Arid Regions, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 1, 2025

Language: Английский

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A multi-field coupled model contained volumetric strain for unsaturated frozen soil and thermal-hydro-mechanical evolution characteristics of permafrost tunnel

Cold Regions Science and Technology, Journal Year: 2025, Volume and Issue: unknown, P. 104510 - 104510

Published: April 1, 2025

Language: Английский

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