Estudio geotécnico in Cilleros

In Cilleros, formations of slate and schist predominate, providing a substrate that is typically consistent and homogeneous for construction uses. The occasional presence of granite, gneiss and igneous rocks improves local bearing capacity, whereas the smaller deposits of fine sands and silts require special attention if they are located in the foundation area, as they could affect stability due to their compressibility. In general, the low permeability of these ground conditions minimises the risk of differential settlement and makes it easier to select shallow foundations, except in areas locally altered.

The seismic activity in Cilleros is considered significant, with 56 recorded events over the last 30 years, although the maximum magnitude is low (Mmax 3.1), so the structural constraint due to seismicity is limited but should not be entirely disregarded in sensitive projects. The non-clayey substrate guarantees the absence of risk of expansivity in the foundation materials. Given the geotechnical scenario, the main factor for analysis will be the accurate characterisation of discontinuities in the slates and schists, as well as avoiding specific areas of looser materials when implementing the foundations.