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Pajares Base Tunnel
The Pajares Base Tunnel is a twin pair of railway tunnels beneath the Puerto de Pajares pass in the Cantabrian Mountains, Spain. Once completed, the length tunnel will form a key portion of the high-speed rail line between Valladolid and Gijón, and shall be used by both high speed passenger trains as well as by slower freight trains. Work commenced on the Pajares Base Tunnel following its authorisation in 2003. During the construction process, multiple setbacks were incurred on the part of the geological conditions present, particularly the copious ingress of water into the tunnels. Despite multiple years of remedial work and the deployment of unique engineering solutions, the infiltration issue has proved to be difficult to address, and questions have arisen as to if its electrification is even practical. As a result, the fitting-out of the tunnel has been delayed by several years. Early on, the through route was expected to be open in 2010. As of August 2022, the tunnels are ex ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Variante De Pajares1
is a Japanese Horror fiction, horror manga by Iqura Sugimoto. The manga focuses on Hosho Aiko, a girl who is brought back to life by the left arm of a "Chimera", a grotesque human-derived species that can drastically alter the shape of their own body parts. Story Hosho Aiko should be dead. To be precise, when she came back home one day, she found her entire family slaughtered by a grotesque monster. The creature attacked and killed her as well, but she finds herself awakening in a mysterious room, taken care of by Dr. Kochigawa. She has amnesia, but when another monster appears before her in her room, she regains her memories and her left arm changes into a powerful weapon, very similar to that of the monster, which she destroys. Sudo remains as the closest person to Aiko, actively taking part in her missions and supporting her. He is alerted by a mysterious person of the existence of a girl named "Nana", about whom Sudo reacts with shock. It is revealed that Nana was a girl S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dragados
ACS, Actividades de Construcción y Servicios, S.A. () is a Spanish company dedicated to civil and engineering construction, all types services and telecommunications. It is one of the leading construction companies in the world, with projects in many countries around the world. The company was founded in 1997 through the merger of ''OCP Construcciones, S.A.'' and ''Ginés Navarro Construcciones, S.A.'' The group has a presence in Germany, India, Brazil, Chile, Morocco and Australia. The headquarters are in Madrid and the chairman is Florentino Pérez. Listed on the Bolsa de Madrid, the company's shares form part of the IBEX 35 stock market index. History The company was formed when a team of engineers acquired ''Construcciones Padrós S.A.'', a construction business which had been in financial difficulty, in 1983. The company acquired a majority holding in ''Cobra'', a support services business, and merged with ''OCISA S.A.'' to create ''OCP Construcciones, S.A.'' in 1993; it we ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alstom
Alstom SA is a French multinational rolling stock manufacturer operating worldwide in rail transport markets, active in the fields of passenger transportation, signalling, and locomotives, with products including the AGV, TGV, Eurostar, Avelia and New Pendolino high-speed trains, in addition to suburban, regional and metro trains, and Citadis trams. Alsthom (originally Als-Thom) was formed by a merger between Compagnie Française Thomson-Houston and the electric engineering division of Société Alsacienne de Constructions Mécaniques in 1928. Significant later acquisitions included the Constructions Electriques de France (1932), shipbuilder Chantiers de l'Atlantique (1976), and parts of ACEC (Belgium, late-1980s). A merger with parts of the General Electric Company (UK) formed GEC Alsthom in 1989. Throughout the 1990s, the company expanded its holdings in the rail sector, via the acquisition of German rolling stock manufacturer Linke-Hofmann-Busch and Italian rail signall ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Karst
Karst is a topography formed from the dissolution of soluble rocks such as limestone, dolomite, and gypsum. It is characterized by underground drainage systems with sinkholes and caves. It has also been documented for more weathering-resistant rocks, such as quartzite, given the right conditions. Subterranean drainage may limit surface water, with few to no rivers or lakes. However, in regions where the dissolved bedrock is covered (perhaps by debris) or confined by one or more superimposed non-soluble rock strata, distinctive karst features may occur only at subsurface levels and can be totally missing above ground. The study of ''paleokarst'' (buried karst in the stratigraphic column) is important in petroleum geology because as much as 50% of the world's hydrocarbon reserves are hosted in carbonate rock, and much of this is found in porous karst systems. Etymology The English word ''karst'' was borrowed from German in the late 19th century, which entered German much earlier ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tunnel Boring Machine
A tunnel boring machine (TBM), also known as a "mole", is a machine used to excavate tunnels with a circular cross section through a variety of soil and rock strata. They may also be used for microtunneling. They can be designed to bore through hard rock, wet or dry soil, or sand. Tunnel diameters can range from (micro-TBMs) to to date. Tunnels of less than a metre or so in diameter are typically done using trenchless construction methods or horizontal directional drilling rather than TBMs. TBMs can be designed to excavate non-circular tunnels, including u-shaped, horseshoe, square or rectangular tunnels. Tunnel boring machines are used as an alternative to drilling and blasting (D&B) methods in rock and conventional "hand mining" in soil. TBMs have the advantages of limiting the disturbance to the surrounding ground and producing a smooth tunnel wall. This significantly reduces the cost of lining the tunnel, and makes them suitable to use in urban areas. The major disadvan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oviedo
Oviedo (; ast, Uviéu ) is the capital city of the Principality of Asturias in northern Spain and the administrative and commercial centre of the region. It is also the name of the municipality that contains the city. Oviedo is located approximately southwest of Gijón and south of Avilés, both of which lie on the shoreline of the Bay of Biscay. Oviedo's proximity to the ocean of less than in combination with its elevated position with areas of the city more than 300 metres above sea level causes the city to have a maritime climate, in spite of its not being located on the shoreline itself. History The Kingdom of Asturias began in 720, with the Visigothic aristocrat Pelagius's (685–737) revolt against the Muslims who at the time were occupying most of the Iberian Peninsula. The Moorish invasion that began in 711 had taken control of most of the peninsula, until the revolt in the northern mountains by Pelagius. The resulting Kingdom of Asturias, located in an eco ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Madrid
Madrid ( , ) is the capital and most populous city of Spain. The city has almost 3.4 million inhabitants and a metropolitan area population of approximately 6.7 million. It is the second-largest city in the European Union (EU), and its monocentric metropolitan area is the third-largest in the EU.United Nations Department of Economic and Social AffairWorld Urbanization Prospects (2007 revision), (United Nations, 2008), Table A.12. Data for 2007. The municipality covers geographical area. Madrid lies on the River Manzanares in the central part of the Iberian Peninsula. Capital city of both Spain (almost without interruption since 1561) and the surrounding autonomous community of Madrid (since 1983), it is also the political, economic and cultural centre of the country. The city is situated on an elevated plain about from the closest seaside location. The climate of Madrid features hot summers and cool winters. The Madrid urban agglomeration has the second-large ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rail Freight Transport
Rail freight transport is the use of railroads and trains to transport cargo as opposed to human passengers. A freight train, cargo train, or goods train is a group of freight cars (US) or goods wagons (International Union of Railways) hauled by one or more locomotives on a railway, transporting cargo all or some of the way between the shipper and the intended destination as part of the logistics chain. Trains may haul bulk material, intermodal containers, general freight or specialized freight in purpose-designed cars. Rail freight practices and economics vary by country and region. When considered in terms of ton-miles or tonne-kilometers hauled per unit of energy consumed, rail transport can be more efficient than other means of transportation. Maximum economies are typically realized with bulk commodities (e.g., coal), especially when hauled over long distances. However, shipment by rail is not as flexible as by the highway, which has resulted in much freight being haul ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Iberian Gauge
Iberian gauge ( es, ancho ibérico, trocha ibérica, pt, bitola ibérica) is a track gauge of , most extensively used by the railways of Spain and Portugal. This is the second-widest gauge in regular use anywhere in the world. The Indian gauge, , is wider. As finally established in 1955, the Iberian gauge is a compromise between the similar, but slightly different, gauges adopted as respective national standards in Spain and Portugal in the mid-19th century. The main railway networks of Spain were initially constructed to a gauge of six Castilian feet. Those of Portugal were instead built to a and later railways to a gauge of five Portuguese feet – close enough to allow interoperability with Spanish railways. Standard gauge Since the beginning of the 1990s new high-speed passenger lines in Spain have been built to the international standard gauge of , to allow these lines to link to the European high-speed network. Although the 22 km from Tardienta to Huesca (par ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dual Gauge
In railway engineering, "gauge" is the transverse distance between the inner surfaces of the heads of two rails, which for the vast majority of railway lines is the number of rails in place. However, it is sometimes necessary for track to carry railway vehicles with wheels matched to two different gauges. Such track is described as dual gauge – achieved either by addition of a third rail, if it will fit, or by two additional rails. Dual-gauge tracks are more expensive to configure with signals and sidings, and to maintain, than two separate single-gauge tracks. It is therefore usual to build dual-gauge or other multi-gauge tracks only when necessitated by lack of space or when tracks of two different gauges meet in marshalling yards or passenger stations. Dual-gauge tracks are by far the most common configuration, but triple-gauge tracks have been built in some situations. Background The rail gauge is the most fundamental specification of a railway. Rail tracks and whee ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
High-speed Rail In Spain
High-speed rail (HSR) has developed in Europe as an increasingly popular and efficient means of transport. The first high-speed rail lines on the continent, built in the 1970s, 1980s, and 1990s, improved travel times on intra-national corridors. Since then, several countries have built extensive high-speed networks, and there are now several cross-border high-speed rail links. Railway operators frequently run international services, and tracks are continuously being built and upgraded to international standards on the emerging European high-speed rail network. In 2007, a consortium of European Railway operators, Railteam, emerged to co-ordinate and boost cross-border high-speed rail travel. Developing a Trans-European high-speed rail network is a stated goal of the European Union, and most cross-border railway lines receive EU funding. Several countries — France, Spain, Italy, Germany, Austria, Sweden, Belgium, the Netherlands, Poland, Portugal, Russia and the United Kingdom ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Standard-gauge Railway
A standard-gauge railway is a railway with a track gauge of . The standard gauge is also called Stephenson gauge (after George Stephenson), International gauge, UIC gauge, uniform gauge, normal gauge and European gauge in Europe, and SGR in East Africa. It is the most widely used track gauge around the world, with approximately 55% of the lines in the world using it. All high-speed rail lines use standard gauge except those in Russia, Finland, and Uzbekistan. The distance between the inside edges of the rails is defined to be 1435 mm except in the United States and on some heritage British lines, where it is defined in U.S. customary/Imperial units as exactly "four feet eight and one half inches" which is equivalent to 1435.1mm. History As railways developed and expanded, one of the key issues was the track gauge (the distance, or width, between the inner sides of the rails) to be used. Different railways used different gauges, and where rails of different gauge met – ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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