A Multi‐Zone Axisymmetric Model for Consolidation of Saturated Soils Improved by PVTD With Interfacial Thermal Resistance DOI

Kejie Tang,

Minjie Wen, Yi Tian

et al.

International Journal for Numerical and Analytical Methods in Geomechanics, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 19, 2024

ABSTRACT During the process of treating soft soil foundations with prefabricated drainage drains (PVD), “soil columns” form around PVD, and a “weak zone” forms outside range columns.” The difference in properties between two distinct interface, leading to gradual decrease efficiency obstruction vertical channels, which turn causes cracks lateral displacement during consolidation. interfaces adjacent layers are incomplete contact, water within interstices impedes transfer heat, manifesting thermal resistance effect. To address this phenomenon, synchronous measurement system for gradient heat flux density has been developed. Applying Fourier's law conduction, coefficient determined. Based on theory thermo‐hydro‐mechanical coupling, multi‐zone axisymmetric model saturated soils that considers effect proposed. Semi‐analytical solutions were derived validated through comparison custom FEM field experiments. consolidation characteristics under various contact models have also discussed, comprehensive analysis influence different parameters. Outcomes show that: generalized provides better description phenomenon interfaces; ignoring leads an overestimation deformation consolidation, and, decreases thermo‐osmosis characteristics.

Language: Английский

An analytical model for the short-term response of energy piles considering temperature variation effect at the pile-soil interface DOI

Qingkai Zhang,

Xiangyun Zhou, De’an Sun

et al.

Applied Thermal Engineering, Journal Year: 2025, Volume and Issue: unknown, P. 126278 - 126278

Published: March 1, 2025

Language: Английский

Citations

0
Analytical solution for consolidation of partially penetrated drainage columns composite foundation based on modified equal strain assumption DOI
Ruiqing Lang, Yi-Hao Li, Liqiang Sun

et al.

Computers and Geotechnics, Journal Year: 2024, Volume and Issue: 176, P. 106706 - 106706

Published: Sept. 4, 2024

Language: Английский

Citations

1
Analytical Model for Heat Transfer Around Energy Piles in Layered Soil With Interfacial Thermal Resistance by Integral Transform Method DOI

Xiangyun Zhou,

Qingkai Zhang,

De'an Sun

et al.

International Journal for Numerical and Analytical Methods in Geomechanics, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 5, 2024

ABSTRACT Energy piles are commonly deployed in vertically layered geological conditions due to the structure and pile foundation backfill. The imperfect contact between adjacent soil layers results resistance heat transfer at interface, known as interfacial thermal effect. In this paper, energy was simplified a finite‐length solid cylindrical source, an analytical model established for of considering Laplace‐domain solutions temperatures ground were derived by using finite Hankel Laplace transforms. Crump method subsequently employed numerically invert time‐domain solutions. proposed validated comparing with solution homogeneous COMSOL numerical solution. These used analyze temperature response around resistance. Finally, parametric study performed explore effects other properties layer on piles.

Language: Английский

Citations

1
An analytical thermal model for vertical ground heat exchangers in layered soil with thermal resistance DOI
Xiangyun Zhou,

Shixiang Hu,

Weiding Zhuo

et al.

Computers and Geotechnics, Journal Year: 2024, Volume and Issue: 179, P. 106963 - 106963

Published: Dec. 6, 2024

Language: Английский

Citations

1
Numerical Simulation on Two-Dimensional Dual-Zone Axisymmetric Consolidation for Marine Soft Soil Improved by PVTD Considering Interfacial Thermal Resistance DOI Creative Commons

Kejie Tang,

Minjie Wen,

Yi Tian

et al.

Journal of Marine Science and Engineering, Journal Year: 2024, Volume and Issue: 12(10), P. 1878 - 1878

Published: Oct. 19, 2024

Prefabricated vertical drains combined with heating is a new approach to improving the mechanical properties of soft clay foundations. Rising temperatures cause formation concentric and radially aligned soil regions distinct heterogeneous characteristics. This results in incomplete contact between adjacent layers, water interstices impeding heat transfer manifesting as thermal resistance effect. Based on theory thermo-hydro-mechanical coupling, two-dimensional dual-zone axisymmetric marine model improved by prefabricated thermo-drain has been established. A generalized proposed describe effect at interface regions. The effectiveness numerical solution presented this paper verified comparison semi-analytical solutions experiments. consolidation characteristics various depths under different models were discussed comprehensively analyzing effects parameters models. outcomes indicate that provides more accurate description radial soil. influence conductivity coefficient related

Language: Английский

Citations

0
A Multi‐Zone Axisymmetric Model for Consolidation of Saturated Soils Improved by PVTD With Interfacial Thermal Resistance DOI

Kejie Tang,

Minjie Wen, Yi Tian

et al.

International Journal for Numerical and Analytical Methods in Geomechanics, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 19, 2024

ABSTRACT During the process of treating soft soil foundations with prefabricated drainage drains (PVD), “soil columns” form around PVD, and a “weak zone” forms outside range columns.” The difference in properties between two distinct interface, leading to gradual decrease efficiency obstruction vertical channels, which turn causes cracks lateral displacement during consolidation. interfaces adjacent layers are incomplete contact, water within interstices impedes transfer heat, manifesting thermal resistance effect. To address this phenomenon, synchronous measurement system for gradient heat flux density has been developed. Applying Fourier's law conduction, coefficient determined. Based on theory thermo‐hydro‐mechanical coupling, multi‐zone axisymmetric model saturated soils that considers effect proposed. Semi‐analytical solutions were derived validated through comparison custom FEM field experiments. consolidation characteristics under various contact models have also discussed, comprehensive analysis influence different parameters. Outcomes show that: generalized provides better description phenomenon interfaces; ignoring leads an overestimation deformation consolidation, and, decreases thermo‐osmosis characteristics.

Language: Английский

Citations

0