Thermal Modelling of Soil in Earth-Sheltered Structures

This paper introduces a research project, which aims to model the effect of a flame front on a saturated earth berm sheltering a structure. FLAC 3.3 software is to be used to develop the theoretical models. Earth-sheltered structures are known for their energy efficiency. They offer other advantages including protection from natural hazards. Models simulating the behavior of earth sheltered structures in wildfires (bushfires) will be studied. Monitoring of the soil and atmospheric conditions at an earth-sheltered house in Gembrook, Victoria is soon to begin. Other sites may be monitored as the project develops. This data will be used to calibrate the theoretical models. This study should produce guidelines as to the dimensions of a berm, constructed from a “real” soil, which will keep a structure habitable during a bushfire. Risk assessment of this mode of construction in fire prone areas will be quantified. This study may also lead to the modelling and design of earth-sheltered storage structures for fuels or chemicals in fire prone areas.