Expansive soils exhibit significant volume change when experiencing variation of temperature or moisture change. However, previous constitutive models on expansive soil mainly focus on hydraulic conditions, less attention on thermal field. This study delves into the thermo-hydro-mechanical behavior of expansive soils, crucial for applications such as nuclear waste disposal and thermal energy storage. A novel constitutive model, extended from bounding surface plasticity theory, is introduced to simulate the expansive soil behavior under various temperatures. A new approach on effective stress principle considering the effect of temperature is proposed. In this model, changes on suction and temperature are considered, which are in response to mechanical behaviors. Validated by temperature-controlled tests from (Tang et al. in Géotechnique 58:45–54 [1]), the proposed model shows potential in understanding the complex coupling of thermal, hydraulic, and mechanical processes in expansive soils, especially in cyclic environmental conditions.
A Coupled Flow Deformation Model for Expansive Soil with Temperature Change
Lecture Notes in Civil Engineering
International Conference on Transportation Geotechnics ; 2024 ; Sydney, NSW, Australia November 20, 2024 - November 22, 2024
Proceedings of the 5th International Conference on Transportation Geotechnics (ICTG) 2024, Volume 6 ; Kapitel : 11 ; 101-111
18.10.2024
11 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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