Secin Group concludes the foundation and structure works of 46 single-family semi-detached houses in the town of Daganzo de Arriba, Madrid, arranged in four rows. Row 1 (houses 1 to 12) has a ground floor, first floor, ground floor and deck. Same arrangement as row 3 (housing 23 to 34). Row 2 (houses 13 to 22) has a floor for the ground floor, another for the first floor and a last for the deck. Finally, the houses 35 to 46 that correspond to row 4, have a basement, in addition to the ground floor, first, undercover and covered.
In the case of the first 3 rows, sanitary floor slabs have been used for the ground floor, made up of prestressed joists and porexpan slabs. The basic purpose of the toilet is to prevent the passage of moisture from the ground to the interior of the house. This is achieved by creating a small air gap between the floor and the first floor of the building. This air chamber must be properly ventilated to prevent moisture from accumulating inside it. The rest of the floors of the different plants have been unidirectional «in situ» with ceramic bollards. The forge corresponding to the ground floor of row 4, when having a basement, has been executed according to the other plants, that is to say, forged «in situ» unidirectional with ceramic bollards but supported on perimetral walls. As for the covers, the rows 1,3 and 4 are inclined, two-way, while the cover of the die 2 is flat. All pillars are made of concrete, as are the walls in the basement floor of row 4.
The work begins with row 4. After completing the excavation and foundation of the shoes, the basement walls are continued. In this case, the engineering department proposes that the pillars be born in the wall to eliminate the foundation section to low.
Difficulties in work and solutions
In the first place, there was not too optimum soil. This involved the realization of foundation wells to reach the most competent soil. The terrain was worse on rows 2 and 3 and resulted in each shoe being at a different height. Finally, the solution was to adapt each of the dwarfs in row 3 (pilasters that are born in the foundation and are buried) to the different heights. This resulted in 46 distinct heights. For row 2 it was decided to pour excess cleaning concrete to reach a uniform level in all the shoes and not to change the height of the dwarves.
Banking between homes. In rows 1 and 4 there are banks («jumps») every two houses. This made the concreting tasks very difficult and slowed down. The yields were drastically reduced because no more than one or two dwellings could be concreted at one time. In row 3 there was only one bank and in row 2 none. Here the performances were much better and the execution much faster.