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http://dx.doi.org/10.7474/TUS.2019.29.1.038

Introduction of Barcelona Basic Model for Analysis of the Thermo-Elasto-Plastic Behavior of Unsaturated Soils  

Lee, Changsoo (Radioactive Waste Disposal Research Division, Korea Atomic Energy Research Institute)
Yoon, Seok (Radioactive Waste Disposal Research Division, Korea Atomic Energy Research Institute)
Lee, Jaewon (Radioactive Waste Disposal Research Division, Korea Atomic Energy Research Institute)
Kim, Geon Young (Radioactive Waste Disposal Research Division, Korea Atomic Energy Research Institute)
Publication Information
Tunnel and Underground Space / v.29, no.1, 2019 , pp. 38-51 More about this Journal
Abstract
Barcelona Basic Model (BBM) can describe not only swelling owing to decrease in effective stress, but also wetting-induced swelling due to decrease in suction. And the BBM can also consider increase in cohesion and apparent preconsolidation stress with suction, and decrease in the apparent preconsolidation stress with temperature. Therefore, the BBM is widely used all over the world to predict and to analyze coupled thermo-hydro-mechanical behavior of bentonite which is considered as buffer materials at the engineered barrier system in the high-level radioactive waste disposal system. However, the BBM is not well known in Korea, so this paper introduce the BBM to Korean rock engineers and geotechnical engineers. In this study, Modified Cam Clay (MCC) model is introduced before all, because the BBM was first developed as an extension of the MCC model to unsaturated soil conditions. Then, the thermo-elasto-plastic version of the BBM is described in detail.
Keywords
Barcelona Basic Model (BBM); Thermo-elasto-plastic model; Unsaturated soils; Bentonite buffer materials; Coupled thermo-hydro-mechanical behavior;
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