Spatial Modelling for the Assessment of Geotechnical Parameters

Spatial modelling of geotechnical parameters can help engineers tackle the inherent uncertainty related to the subsurface. In the paper, the 3D spatial modelling is used in order to properly assess geotechnical properties and to identify the problems encountered during the construction of the underground hazardous waste repository of the Lavrion Technological and Cultural Park. The input data used originated from the initial borehole investigation and the analysis focused on the main geotechnical properties of UCS and RQD. The SURPAC software package was used for the development of the 3D spatial models of the subsurface, while the final outputs were presented in the form of block models. The analysis showed good correlation with the actual encountered conditions and was able to identify the risk-prone areas having deteriorated geotechnical characteristics - near the entrance area - as well as to assess the strength of the rock pillars.