The tunnel’s section is cast in one phase only, using a stationary pumping system and concrete distribution to a series of formwork apertures and concrete outfalls. The concrete vibration was done recurring to vibrating pokers and formwork vibrators on the lower half, on the upper half it was only used the formwork vibrators. The stop-ends of the formwork were done using traditional timber formwork and after the cast of the element, the stop-ends were scabbled to guarantee the adherence of the concrete. The tunnel was coated with concrete and only on areas of greater geologic vulnerability was used reinforced concrete.
