Published: Jan. 1, 2023

The evolution mechanism of frozen soil involves a complex dynamic coupling process among temperature, moisture, and the stress field. However, existing research has struggled to adequately describe interplay between these factors. To address this, we have independently designed developed multifunctional loading system for geotechnical engineering its corresponding technology. Using vertical shaft freezing model, studied spatiotemporal thermo-hydro-mechanical (THM) multi-field coupling. Drawing on experimental data concerning volumetric heat capacity thermal conductivity samples at varying temperatures, refined governing equations This paved way establishment an evaluative framework projects. Incorporating 2-tuple linguistic Bayesian networks, redefined weighting approach comprehensive evaluation model in social sciences, introducing methodology translate into adjusted weights criterion level. Research findings indicate that, compared interface, main section experiences not only more intense variations temperature field but also heightened activity in-situ or moisture migration. Both radial circumferential characteristic faces exhibit wave-like gradient evolution. face displays critical approximating 3.8m-1, whereas face's curve undergoes temporal elongation peak, resulting no discernible extremities. Each position's frost heave force growth three distinct phases: incubation, rapid increase, stabilization. During same phase, response time is roughly equivalent. moving outward along equivalent radius, exhibits progressively delayed trend. After 2880 mins freezing, expansion area wall amounts 0.25m², with average -11.58℃ mean water content 14.6%. In practical applications, it generally recommended continue using plan typical areas geological conditions, might be prudent consider increasing arrangement density pipes. For scenarios where there stringent requirement control heave, adopting staggered pipe layout advisable.

Language: Английский