Thermo-poromechanical modeling of saturated clay soils considering bound water dehydration.
Bibliographic record
Abstract
The non-isothermal deformation of clay soils is a critical concern in energy and environmental-related geotechnics, given the complex microstructure and mineral composition of clay-related geomaterials. Investigating their thermo-mechanical behaviors poses significant challenges that previous studies have often overlooked. Specifically, distinguishing between thermal plastic strain and clay dehydration strain has received little attention. \nTo address these gaps, a novel constitutive model is proposed for describing the thermo-elastoplastic behaviors of water-saturated clayey soils. The model incorporates the effects of temperature variation and mechanical loading on elastoplastic strains and dehydration behavior. The thermo-mechanical behavior is quantified using thermodynamics laws and unconventional plasticity principles. Additionally, a finite element method (FEM) model is employed to simulate the thermo-hydro-mechanical (THM) responses of water-saturated clay soils. This FEM model accounts for temperature variation effects on bound water dehydration and corresponding thermo-poromechanical strains. By incorporating unconventional plasticity, the elasto-plastic behavior is more accurately described. The validation process for this FEM model involves laboratory results on various clay soils with different geological origins, demonstrating a reasonable agreement between the model's predictions and experimental data. Notably, the numerical results highlight the impact of bound water dehydration on the generation of excess pore pressure in clay soils during heating. \nExpanding beyond the realm of theoretical models, a research project is underway to assess the geomechanical performance of a potential borehole thermal energy storage system (BTES) in a Canadian subarctic region. To quantify the poromechanical impact, a two-dimensional finite element model (FEM) is created to simulate a BTES system, encompassing the borehole and the surrounding soil formation. The model aims to analyze the effects of cyclic temperature variations and bound water dehydration on the short-term ground response and pore water pressure development. Our results indicate the importance of considering bound water dehydration in characterizing the ground heave process during the short-term BTES operation in an overconsolidated formation. The simulated ground expansion behavior is due to the high excess pore pressure generated during thermal storage, which is accompanied by the release of in-situ effective stresses. The neglect of bound water dehydration will underestimate the magnitude of ground heave during a short-term BTES operation.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".