COUPLED THERMO-HYDRO-CHEMO-MECHANICAL MODELING FOR GEOENVIRONMENTAL PHENOMENA

摘要

Coupled thermo-hydro-chemo-mechanical (THCM) behavior of soils is important in a number of geoenvironmental engineering applications including nuclear waste disposal, landfill engineering, freeze-thaw cycles and fate and contaminant transport. As part of ongoing research and development in this field a number of key developments have been undertaken at the Geoenvironmental Research Centre (GRC), Cardiff, UK, with particular focus on the numerical simulation of these phenomena. This paper outlines some of these developments set within the context of the numerical finite-element model developed at the GRC - COMPASS, and discusses the theoretical and numerical implementation and comparison of numerical simulations with experimental data. In particular the development of the effects of temperatures elevated above 100℃ on gas pressure and water phase change and consequently the moisture movement; frozen ground behavior with particular reference to seasonal freeze-thaw cycles with frost heave and ice segregation possibly leading to solifluction; reactive thermo-hydro-chemical-mechanical models including geochemical behavior with focus on the osmotic potential; and High Performance Computing (HPC) have been included.