Foundation conditions of buildings in undermined areas: An example of evaluation

Evaluation of a set of individual geological and petrophysical parameters is necessary in many geoscientific studies or those with constructional purposes. However, correlation and mutual evaluation of these parameters are very complicated. Our methodology, which is part of the expert evaluation, is based on compilation of four significant effects: local subsurface geology, groundwater table (and accumulation of surface water), deformation of the surface due to mining (subsidence), and landslides. Different values of specified significances were assigned to all four selected effects. The class of foundation conditions was selected according to the summary of values of specified significances for a given point. This value describes how the selected parameters influence vibration effect on the surface and resistance of buildings to this seismic loading. The pilot map of foundation conditions, which was elaborated as part of the evaluation of Stonava area in 2008, is presented.