Revista de Obras Publicas | Year: 2011
The first main roilwoy station at Madrid was built more than 150 years ago. There are many topics to be considered on railway stations, first the functionoilty of the Infrastructure, second the architecture of the main buildings, mainly the iron and steel structure, then how does it fit with the city and the development of urban planificotion, so Important in those yeors. There are many other aspects to be considered: legal, economic, sociologic and so on, but the article is not focused on them. Finally the last upgrading of the main stations: Atocho and Chamartin, as well as the planning for the future ore related.
Vega T.V.,ADIF |
Ortiz J.M.G.,Balfour Beatty Rail Iberica
eb - Elektrische Bahnen | Year: 2012
In April 1992, i.e. 20 years ago, fast train services started in Spain when high-speed trains were put into operation on the almost 500 km long Madrid-Córdoba-Sevilla railway line. Both the 1,435 mm UIC standard gauge and the 1 AC 25 kV 50 Hz overhead line voltage level meant a big step in the development. Today the Spanish high-speed network covers some 2,200 km of railway line, and more lines are planned or already under construction.
Numerical modelling of stress-strain behaviour of a tunnel excavated with earth pressure balance (EPB) shield applying different materials constitutive models. Application to a real case: Quejigares tunnel [Modelización numérica del comportamiento tenso-deformacional de un túnel excavado con escudo de presión de tierras (EPB) mediante diferentes ecuaciones constitutivas de los materiales. Aplicación a un caso real: túnel de Quejigares]
Escribano R.R.,Prointec |
Gepp J.E.,Laboratorio Of Geotecnia Cedex |
Sierra M.E.L.,ICYFSA |
Revista de Obras Publicas | Year: 2012
Tunnels design requires the determination of two basic data, the stress-strain over the support-lining, analysed over time with different calculation methodologies (empirical, analytical, and numerical methods). Based on the current state-of-the-art, theoretical knowledge has been applied to the information gathered and analysed from the construction process of a tunnel excavated with an EPB TBM, specifically the Quejigares tunnel. To achieve these goals, a 2D numerical model has been developed, applying the "contraction model" method, in order to compare the stress and strain results with the results measured at the worksite. With the help of certain theoretical adjustments, a set of conclusions were ultimately drawn in regard to the advantages and disadvantages of the different geotechnical tunnel-design analysis tools used, focusing on the constitutive models of the materials, as well as the importance of a suitable geological-geotechnical model.
Capellan G.,Arenas and Asociados |
Meana I.,ADIF |
Beade H.,Arenas and Asociados |
Garcia P.,Idom Madrid |
Arenas J.J.,Arenas and Asociados
Engineering for Progress, Nature and People | Year: 2014
The Almonte River arch bridge over the Alcantara Reservoir, which is part of the Madrid-Portuguese Border High Speed Rail (HSR) link, is a challenge for bridge design, engineering and construction. Its 384-m main span will make this major project become the largest HSR arch in the world and the largest railway bridge in Spain. With the aim of giving response from the design stage to the specific problems of a HSR crossing with large span and length, a formally and structurally innovative design has been used: the arch, linked to the deck at the crown, has an octagonal section with variable depth and width in its central 210 m, from where it splits itself into two legs with irregular hexagonal section until its springings. The design joins together structural efficiency, out-of-plane stability (as HSR horizontal deflection limits require), improved response to wind loads (as exhaustive wind tunnel tests have proved), transparency, aesthetics and durability.
Salorio D.,ADIF |
Villanueva J.P.,ADIF |
Castanedo F.J.,EPSA |
Jorda L.,Counsellor ADIF |
Oteo C.,Counsellor ADIF
Rock Engineering and Rock Mechanics: Structures in and on Rock Masses - Proceedings of EUROCK 2014, ISRM European Regional Symposium | Year: 2014
In this paper, a rigorous analysis by a 2D finite element code of the influence of rock mass fracturing and the influence of the water seepage in the design of a tunnel support, excavated by N.A.T.M. are introduced. Also, the existence of longitudinal joints in the rock mass is their influence in the variation of the safety factor of the primary support is taken into account. The rock mass formation is constituted by schists and shales. The field case of reference is the Prado Tunnel in the High Speed Line between Lubián and Ourense (North of the Spain). The rock characterization has been done by the Bieniawski's rock index RMR and Barton's index Q. Also the definition of the Hoek and Marinos GSI index is employed. The range of corrections of the RMR and Q index, originated by the influence of the analyzed factors, is determinated by the numerical simulation. © 2014 Taylor & Francis Group, London.