Passenger terminal of train station in Madrid

Passenger terminal of train station in Madrid

Building use

Other

Country/Region

Spain

Overview

The project described is the first part of a multi-stage extension project of the Madrid Atocha train station passenger terminal, to manage a two fold increase in passenger traffic in about 10 years. The main strategy adopted here is to separate the flux of passengers arriving from those departing from the station.

Basic information (construction date, number of stories, gross floor area, adopted design code, engineer(s), Contractor(s), etc.)

Construction date: 2010
Number of stories: –
Gross floor area: –
Adopted design code: Eurocode
Engineer(s): CFC S.L. + MC2 Estudio de Ingeneria + ADIF
Contractor(s): –

Issue and/or innovation

The construction work happened while the train station was in use. All measures had thus to be conceived so as to minimize as much as possible the impact on the train traffic, with many operations happening at night, or in staged phases.

Reason for composite solution

To impact as little as possible with the train operations, most of the construction is done in steel. However, some portions (notably the pedestrian walkways) use a composite construction for performance reasons.

Specific solution/technical details

One of the pedestrian passageways occupies 2 bays of pillars, its width is 33.15 m and its length is 103.7 m. The stairwells and elevators are located in the alignment of the central pillars. The structure is resolved by a framework of mixed beams on which an equally mixed slab is arranged. Within the framework, the longitudinal beams collect the loads on the composite floor, transmitting them to the transverse beams that are connected to the grid of pillars that support the roof. The composite beams have a double T metal section with a depth of 1.00 m, and are connected to the upper slab which is 0.16 m thick. This constitutes the compression layer of the composite beams, made from corrugated metal decking with 1,25mm of steel thickness and 58mm of depth. The architectural project included the creation of an open plaza on one of the 2 sides of the lobby roof, in continuity with the access sidewalk. This required the execution of a new slab, adjacent to the lightened ribbed slab on which the street rests. A mixed folded sheet metal slab with a total thickness of 16 cm was chosen (6 + 10 cm), connected to metal beams 690 mm deep and spans between 13.60 and 22.15 m. The cross section of said beams is made up of a reinforced “I” profile. In order to make way for the necessary facilities, circular alveoli with a diameter of 400 mm and inter-axes of between 600 mm and 1,000 mm were arranged or larger in some circumstances. In all cases, the composite beams were sized considering a full web without cells, and successively the web thicknesses were increased, carrying out an equivalence, in deformation terms, between 2 finite element models corresponding to a full web beam without alveoli and another with alveoli and greater thickness. These beams are supported on one side by columns, and on the other by a pre-existent 80cm thick concrete wall . Some beams rest on an area of the slab that may suffer horizontal displacements with respect to the new slab, due to thermal effect and/or due to retraction. For this reason, it has been necessary to design a sliding support detail using a 1.2 mm thick Teflon sheet.

References / Technical Papers Content

M. Madrid Ramos, G. Aysuo Calle, P. Tanner, L. Ceriani, E. Artalejo, “Enlargement of Atocha Railway Station (Stage I), Hormigon y Acero 2014, 65 (273): 169-198