Issues involved with thermoactive geotechnical systems: characterization of thermomechanical soil behavior and soil-structure interface behavior

Laloui, Lyesse; Olgun, C. Güney; Sütman, Melis; McCartney, John S.; Coccia, Charles James Russell; Abuel-Naga, Hossam; Bowers, G. Allen

doi:10.1179/1937525514y.0000000010

Cited by 19 publications

(11 citation statements)

References 55 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The effect of temperature in the mechanical behaviour of soils is well-known and rather complex, and has been confirmed for decades in a number of experimental tests (e.g., [23][24][25][26]). For SGE applications this is essentially a one-way effect, as the influence of mechanical actions on the temperature field is usually negligible (Figure 2).…”

Section: Thermo-hydro-mechanical Processes In Soil and Rocksmentioning

confidence: 99%

“…Laboratory test results in those temperature ranges are available in the literature (e.g., [26,185,186]). However, most of the experimental evidence dealing with THM soil behaviour is related to radioactive waste disposal problems, and involve much wider temperature ranges, typically from 20 • C to 100 • C (e.g., [23][24][25]).…”

Section: Relevant Coupling Effects In Energy Geostructuresmentioning

confidence: 99%

“…Laloui et al [26] identified the main issues related to laboratory thermo-mechanical testing, namely developing adequate heating systems, insulation and accounting for thermal losses, thermal calibration, control of boundary conditions, and representing long-term cyclic behaviour. They also categorised thermomechanical tests in three main groups, namely those involving heating by circulating fluid, heating with internal heaters, and heating with external heaters.…”

Section: Laboratory Thm Characterisationmentioning

confidence: 99%

“…They also categorised thermomechanical tests in three main groups, namely those involving heating by circulating fluid, heating with internal heaters, and heating with external heaters. The interested reader is referred to Reference [26] for further details on experimental issues.…”

Section: Laboratory Thm Characterisationmentioning

confidence: 99%

“…This hardening effect (associated with increasing shear strength) in drained conditions was confirmed by Reference [216], who subjected soil samples to heating before shearing them in undrained conditions. [26] using data from References [203,[216][217][218][219][220][221]). Figure 25.…”

Section: Thm Response By Triaxial Testsmentioning

confidence: 99%

See 4 more Smart Citations

Characterisation of Ground Thermal and Thermo-Mechanical Behaviour for Shallow Geothermal Energy Applications

et al. 2017

View full text Add to dashboard Cite

Increasing use of the ground as a thermal reservoir is expected in the near future. Shallow geothermal energy (SGE) systems have proved to be sustainable alternative solutions for buildings and infrastructure conditioning in many areas across the globe in the past decades. Recently novel solutions, including energy geostructures, where SGE systems are coupled with foundation heat exchangers, have also been developed. The performance of these systems is dependent on a series of factors, among which the thermal properties of the soil play a major role. The purpose of this paper is to present, in an integrated manner, the main methods and procedures to assess ground thermal properties for SGE systems and to carry out a critical review of the methods. In particular, laboratory testing through either steady-state or transient methods are discussed and a new synthesis comparing results for different techniques is presented. In situ testing including all variations of the thermal response test is presented in detail, including a first comparison between new and traditional approaches. The issue of different scales between laboratory and in situ measurements is then analysed in detail. Finally, the thermo-hydro-mechanical behaviour of soil is introduced and discussed. These coupled processes are important for confirming the structural integrity of energy geostructures, but routine methods for parameter determination are still lacking.

show abstract

Section: Thermo-hydro-mechanical Processes In Soil and Rocksmentioning

confidence: 99%

Section: Relevant Coupling Effects In Energy Geostructuresmentioning

confidence: 99%

Section: Laboratory Thm Characterisationmentioning

confidence: 99%

Section: Laboratory Thm Characterisationmentioning

confidence: 99%

Section: Thm Response By Triaxial Testsmentioning

confidence: 99%

See 3 more Smart Citations

Characterisation of Ground Thermal and Thermo-Mechanical Behaviour for Shallow Geothermal Energy Applications

et al. 2017

View full text Add to dashboard Cite

show abstract

Experimentation of the Thermo-Mechanical Behavior of the Soil-Concrete Interface

Lupattelli

Cernuto

Brunelli

et al. 2023

Springer Series in Geomechanics and Geoengineering

View full text Add to dashboard Cite

Modeling the combined effect of initial density and temperature on the soil–water characteristic curve of unsaturated soils

Pham

Sütman

2023

Acta Geotech.

View full text Add to dashboard Cite

The soil–water characteristic curve (SWCC) plays an important role in solving the stability and deformation problems of unsaturated soils. In many practical situations, soils are usually experienced by both deformations and thermal conditions. In this interest, the paper proposes a simple and effective model to predict the combined effect of initial density and temperature on the SWCC and to be able to quantify the changes in thermal-hydro-mechanical behavior of unsaturated soils. In the first step, an initial density-dependent SWCC model is presented using the translation principle between particle-size distribution curve and soil–water characteristic curve. In the second part, a non-isothermal model is proposed to predict the effect of temperature on the SWCC. The key to the non-isothermal model is considering five different temperature-dependent functions, which are surface tension, contact angle, particle-size expansion, void ratio, and water density. On the basis of 22 data sets of thermal volume change, this study also developed further a theoretical correlation between void ratio and temperature that is directly related to soil plasticity. It was observed that the value of the thermal void ratio increases as soil plasticity increases, and there is a nonlinear relationship between the plasticity index and the void ratio. Because of this, soils with high plasticity are more susceptible to volume changes caused by temperature fluctuations than soils with low plasticity. A coupled mechanical–thermal model is then produced which is capable to predict separately or simultaneously the effect of temperature and initial density on SWCC. The proposed model is validated against several test data sets available in the literature. The results show that the proposed model has a good performance in predicting the variation in SWCC with arbitrary temperature and initial density.

show abstract

Issues involved with thermoactive geotechnical systems: characterization of thermomechanical soil behavior and soil-structure interface behavior

Cited by 19 publications

References 55 publications

Characterisation of Ground Thermal and Thermo-Mechanical Behaviour for Shallow Geothermal Energy Applications

Characterisation of Ground Thermal and Thermo-Mechanical Behaviour for Shallow Geothermal Energy Applications

Experimentation of the Thermo-Mechanical Behavior of the Soil-Concrete Interface

Modeling the combined effect of initial density and temperature on the soil–water characteristic curve of unsaturated soils

Contact Info

Product

Resources

About