Identification	Footbridge. Connection between Historic Town Center and New City Developments.
Situation	PAMPLONA
Project day	2009
Work to date
Architects	MARISOL GARCÍA TORRENTE UBALDO GARCÍA TORRENTE EDUARDO MARTÍNEZ MOYA
Partners	EDARTEC CONSULTORES SALVADOR LÓPEZ CERVANTES JACOB MARTÍNEZ ARIZA ESAÚ VÁZQUEZ RODRÍGUEZ JOSÉ LUÍS RAMOS CHÍA
Quantity Surveyors
Others Partners
Promoter	PAMPLONA CITY COUNCIL
Companies
Publications
Awards

The draft submitted to the footbridge is based on 2 key points: the requirements of continuity and elimination of architectural barriers and the creation of a sensitive subject with the urban landscape in which they insert. As the specification says, "Within the general accessibility brought by the city of Pamplona, the drop in Labrit point remains unresolved in the east of the city by creating a large breaking of the urban fabric, with dysfunctional that would be created, between the Old and Second Extension of the city." The footbridge would allow comfortably pass through the Paseo de Ronda, ensuring uninterrupted pedestrian way between the Paseo del Obispo Barbazán and bulwark of Labrit (Plaza de Santa María Real) with the area of the 2 nd extension of Pamplona (bullring) and Park Crescent (ripa of Beloso). In this way, moreover, would allow the enhancement of unexplored aspects of heritage. Regarding the proposed design has opted for the simplicity of the item, free of any formula that involves a formal boast technological or excess materials or building details apparent to achieve it in a decisive and firm action, the most important being its physical presence in space. In this way the object does not compete with the many situations that exist at this point: long-distance infrastructure, concentration of buildings of different ages, economic elements rooted in the collective memory, a green mass that bind your all getting a sense of continuity. The footbridge thus becomes an element alien to all, while being able to put each one in load, allowing live these different situations from unusual positions, especially those trees whose crowns can now be touched. Structurally, the bridge is divided into 2 elements: beam and platform (section cantilever slab variable). Both elements will be of concrete. The beam would be made of white concrete, while the concrete slab would be more natural color in a coating that will bring improvements and sealing qualities of transitivity, while soften the color of that item to leave it with the desired black. - STRUCTURAL TECHNICAL PROPOSAL: The structural solution is proposed as a bridge that must climb a length of 78 metres, under which runs the Labrit Slope. The structural design of the construction of a curved beam of great size, of 3.40 metres, resolves the path from one point to another. We propose a solution that allows post-stressed to withstand the anticipated loads. Similarly, a slab of variable depth cantilever works structurally with an arc, allowing pedestrian traffic on it. The post-tensioning allows use of very slender solutions, singing relationships / birth between 1 / 30 and 1 / 45 depending on the boundary conditions. This allows us to bridge without supports, with a very clean design. This implies a reduction in weight of the structure and better use of steel reinforcements ready. The parabolic path of the tendons produces efforts to counter the gravitational forces, taking his total or partial compensation. As a criterion for post-tensioned pre-dimensioning of the permanent loads is compensated at a rate that hovers around 80% because of the overloads are small relative to the weight of its own. The compression introduced by the prestressing on the section also have a favorable effect on cracking, which keeps intact the stiffness and consequently control the deformation. The set is rounded off at their ends with respective abutments foundations, pile caps singing with 150cm, supported on groups of 8 850cm diameter piles to provide stability and to transmit to ground the efforts of flexo-existing compression and torsion. - JUSTIFICATION FOR THE SUITABILITY OF THE LOCATION: The sites chosen for the starting of the footbridge are: The platform next to Fire Station building and more specifically the retaining wall that separates the Fort of St. Bartholomew, which was predetermined by the rules of the competition. The base of the green triangle between the slope of the street Juan de Labrit, Labrit's fort and the pediment above the retaining wall next to the cloakrooms. The second item was another 2 immediate possibilities: landing at +441.28 metres at elevation on the green strip attached to the Descent of Labrit, implying a slope of 10.5% of the bridge passable board, or disembark on passable cover of the costumes from Fronton, as suggested from the bases, but this would involve great technical difficulties and especially the involvement of an easement of one over the other not recommended. The solution adopted is committed to technical simplicity, the formal balance and comfort in its path with a slope of 2.4%, making it a pleasant walk that saves conveniently the descent of Labrit.