Coupled Thermo-Hydro-Mechanical Modeling of Saturated Boom Clay
Coupled Thermo-Hydro-Mechanical Modeling of Saturated Boom Clay
复制标题
饱和繁荣粘土的热-水-机械耦合建模
DOI：
10.1061/9780784482827.038
复制
发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Ghasemi-Fare, Omid
中科院分区：
文献类型：
--
作者：
Tamizdoust, Mohammadreza Mir;Ghasemi-Fare, Omid
低渗透土壤(如粘土)中的温度变化会产生孔压，这就是所谓的热加压。以往的研究表明，热增压很大程度上依赖于热增压系数。该系数取决于土壤类型，并且由于水的热膨胀系数对温度的依赖性而随温度变化。热增压通常通过热-水-力(THM)数值模拟来研究。在文献中，已经研究了关于热负荷的TEM过程，以通过结合先进的热机械本构模型来证明现场观测的合理性。然而，使用先进的热弹塑性模型进行数值模拟的结果与实验和现场观测结果仍然存在一定的差异。在这项研究中，通过采用一个相对简单但实用的热孔弹性有限元模型，仔细考虑了介质和饱和流体(即水)随温度变化的热、水力和力学性质，对Boom粘土中的热压进行了评估。利用COMSOL多物理软件进行数值模拟，并将数值模拟结果与比利时大型实验装置ATLAS项目进行了比较和验证。结果表明，热工和水力耦合参数是影响热压变化的关键因素。
Temperature variations in low permeable soil (e.g. clay) induce pore pressure, which is known as thermal pressurization. Previous research showed that thermal pressurization highly depends on thermal pressurization coefficient. This coefficient depends on the soil type and changes with temperature due to temperature dependency of thermal expansion coefficient of water. Thermal pressurization is often investigated through thermo-hydro-mechanical (THM) numerical modeling. THM process, with respect to thermal loading, has been examined in the literature to justify the field observations by incorporating advanced thermo-mechanical constitutive models. However, result of numerical simulations using advanced thermo-elastoplastic models still show some discrepancies with experimental and field observations. In this study, the assessment of thermal pressurization in Boom clay is scrutinized through employing a relatively simple while practical thermo-poroelastic finite element model with careful consideration of the temperature-dependent thermal, hydraulic, and mechanical properties of the medium and saturating fluid (i.e. water). The numerical model is carried out using COMSOL Multiphysics and the results of the numerical simulations are compared and validated with the ATLAS project, a large-scale experimental facility in Belgium. The results confirm that thermal and hydraulic coupling parameters are the key factors to change thermal pressurization.
影响因子：
5.3
作者：
Mohammadreza Mir Tamizdoust;Omid Ghasemi-Fare
通讯作者：
Mohammadreza Mir Tamizdoust;Omid Ghasemi-Fare
粘土原位热机械实验概述：概念、结果和解释
DOI：
--
发表时间：
1996
期刊：
影响因子：
--
作者：
F. Bernier;B. Neerdael
通讯作者：
B. Neerdael
DOI：
--
发表时间：
2016
期刊：
影响因子：
--
作者：
Omid Ghasemi;P. Basu
通讯作者：
P. Basu