Investigating the effect of soil layering on the pressure and acceleration on the underground habitats against the waves caused by surface explosion

The response of underground habitats to loading from a surface explosion is a major issue in environmental Protection. Underground habitats are often found in small and large caves, as well as in the form of groundwater aquifers under mountain ranges and in various parts of the globe. So far, many studies have been carried out on various parameters such as ground response, structure response, field experiments, etc. However, there are still many unknown and vague aspects of the explosion and its impact on the soil and structure environment. In this study, the effect of soil layering on the safety of an underground habitat has been investigated in terms of acceleration value and pressure transfer on it. Autodine software has been used to model the underground habitat, and two Lagrangian and Eulerian environments have been considered. The chosen explosive charge in this study is 52.16 kg of TNT, and the data is recorded using the gauges enclosed in the model. The results show that the presence of a sandy clay layer in the surface has transferd the more pressure to the next layer and led to the deterioration of the situation. Also, the presence of dry sand clay under the sand layer has increased the acceleration value.