Spanish experience on railway tunnels in evaporites: Regajal tunnel study case, Aranjuez, Spain.

The Tunnel of Regajal is one of the last tunnels built in evaporitic terrains in Spain. Experience accumulated previously in other similar tunnels and a greater dedication and effort in the previous studies, design, geology and hydrogeology of the site, and technical assistance to the construction and projects have contributed to consolidate methodologies and construction processes in evaporitic emplacements in Spain and increase the assortment and practice in these works. However, a more global and integrative approach to the project and the works would probably have been necessary to obtain a better knowledge of the hydrogeological problems in this type of ground. The work presented is a proposal to integrate those actions that are summarized in a greater conceptualization of the hydrogeological models used (causes, effects, operation) and an integration of all project phases: planning, design, construction and exploitation. [ABSTRACT FROM AUTHOR]