A general interfacial thermal contact model for consolidation of bilayered saturated soils considering thermo‐osmosis effect

Abstract

In this paper, a general interfacial thermal contact model is proposed to investigate the heat conduction characteristics at the interface of bilayered saturated soils. The semianalytical solutions of thermal consolidation of the bilayered saturated soils considering thermo-osmosis effect under ramp-type heating are derived by using the Laplace transform. Then, the expressions of the temperature increment, excess pore water pressure, and displacement are obtained in time domain by using the Crump's method. Comparisons are performed to verify the rationality of the obtained solutions, and the influences of contact transfer coefficient, partition coefficient, and the thermo-osmosis coefficient on the thermal consolidation of the bilayered saturated soil are illustrated and discussed. Neglecting the thermal contact resistance would overestimate the thermal consolidation behavior of the bilayered saturated soils. The calculated excess pore water pressure and displacement considering thermo-osmosis effect are much larger than those without thermo-osmosis effect.

Thermal consolidation of layered saturated soil under time‐dependent loadings and heating considering interfacial flow contact resistance effect

“…To verify the correctness of the computational results, if the complete flow contact model is adopted and the physical parameters of two layers are the same, while the loading acting on the soil surface is set to zero, the solution in this paper can be degraded to the thermal consolidation solution proposed by Zhou et al 30 Furthermore, Wen et al 22 considered the thermal contact resistance effect of the interface and studied the thermal consolidation of a bilayered saturated soil foundation. By using the complete thermal contact model, the physical parameters of the two layers of saturated foundation soil were set to be the same, and the loading acting on the soil surface was set to zero.…”

“…In chapter 2.1, a flow contact resistance model was established based on the Hagen-Poiseuille law, which resulted in the construction of four different contact conditions at the interface. Case 1: Complete flow contact model [21][22] 𝑝 (𝐽) (𝑥, 𝑡)| 𝑥=…”

“…Moreover, thermal consolidation of saturated soil, [18][19][20] a widely researched aspect in geotechnical engineering, remains an area that necessitates further investigation. Saturated soil foundations, characterized by natural layering, [21][22][23] exhibit uneven interfaces between two layers containing small, water-filled gaps. The slow seepage velocity of pore water through these interface gaps is attributed to factors such as low porosity, small particle size, and curved fluid channels, which ultimately lead to laminar flow at the interface.…”

“…In their analysis, they also considered the effect of thermal contact resistance. Furthermore, Wen et al 22,47 developed a comprehensive interfacial thermal contact model to investigate the influence of the thermal contact resistance coefficient on the dynamic response of a double-layered saturated soil foundation. It is important to note that the flow of pore water in the void channels at the interface of the bilayered saturated soil foundation is impeded due to factors such as low porosity, bending of fluid channels, and the viscosity of pore water.…”

One‐dimensional nonlinear creep consolidation of soft soils with time‐dependent drainage boundary under construction load

“…[22][23][24] The former usually introduces the elementary creep elements or their combinations into the consolidation theory to describe the stress-strain relationship of soft soils. For instance, works of literature 25,26 have investigated the thermal consolidation characteristics of saturated porous media based on the linear stress-strain relationship and further revealed the coupling 1D thermal consolidation behavior. Recently, some scholars have proposed the element creep model modified by fractional derivative into consolidation 21 and pointed out that the modified model can achieve a good fitting effect with fewer model parameters.…”