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[III-185] Thermodynamic analysis model for swelling behavior of tunnels

*山本 颯人¹、京谷 孝史¹、松原 成志朗¹、劉 暁東¹ (1. 東北大学大学院工学研究科)

Keywords:Smectites, Swelling clay mineral, Modified Cam-Clayl model, Return mapping

In recent years, in the ground containing smectites, which is a swelling clay mineral, there is a problem that the underground structures such as tunnels are destroyed due to water absorption and swelling of smectites. The failure problem of the tunnel in the swellable ground requires appropriate modeling for the swelling of the ground. In this study, a modified cam clay model of clay is adopted as an elasto-plastic mechanical model, and a swelling model of smectite combined with it is constructed.