Geotechnical study in Las Ventas de Retamosa

In Las Ventas de Retamosa, soils formed by sandstones, conglomerates and flysch predominate. These materials generally provide a medium to high bearing capacity and favourable conditions for shallow or semi-deep foundations, depending on the degree of compaction and the local stratigraphy. The occasional presence of limestones, dolomites and marbles may locally improve ground strength; however, it is recommended to assess the variability of the subsoil in the preliminary stages of any geotechnical study. Extensive but discontinuous aquifers require special attention in relation to the management of the groundwater level and possible seepage.

Seismicity is a relevant factor in this area, with more than 150 recorded events over 30 years and a maximum magnitude of 5.1, which requires strict compliance with the seismic-resistant regulations in structural design. Although expansive clays are not predominant and are found only in certain climatic zones, their subordinate presence advises identifying them during in situ investigation to avoid swelling problems in specific areas. The main limiting factor for building in Las Ventas de Retamosa is the need to account for seismic actions in structural calculations.