Abstract: The reinforced concrete structure of this construction comprises tubular elements of permanent shuttering, connected by structural parts defined by external pile planks and internal permanent shuttering tangential to the tubular elements. The method of building consists in driving in the tubular elements and the pile planks over the entire length of the construction, emptying the tubular elements of the earth with which they are filled, reinforcing and casting concrete into these elements, excavating the interior of the section defined by these tubular elements and the pile planks, progressively disposing props, inserting the inner shuttering between these props and these tubular elements and subsequently reinforcing and casting concrete between this shuttering and the pile planks.