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Flying Arch
A flying arch is a form of arch bridge that does not carry any vertical load, but is provided solely to supply outward horizontal forces, to resist an inwards compression. They are used across cutting (transportation), cuttings, to avoid them collapsing inwards. Operation The conventional arch supports a vertical load downwards on the centre of the arch and translates this into forces both downwards and outwards at the base of the arch. In most cases, this sideways force is a nuisance and must be resisted by either strong foundations or a further 'bowstring' girder, in the form of a tied-arch bridge. In some cases though, originally for railway cuttings in loose rock, the sides of the cutting are unable to retain their own weight and tend to slide inwards. Flying arches may be provided to retain these side walls. Unlike the conventional arch, the vertical load on the arch does not carry a useful load, it is merely used to generate the side-thrust, which in this case is useful for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Llansamlet Flying Arches
Llansamlet is a suburban district and Community (Wales), community of Swansea, Wales, falling into the Llansamlet (electoral ward), Llansamlet ward. The area is centred on the A48 road (named Samlet Road and Clase Road in the area) and the M4 motorway. Like other places in Wales having a name beginning with Llan place name element, Llan, Llansamlet is named after a church, usually itself bearing the name of a saint – in this case, the church of Saint Samlet. There is a Saint Samlet's Church in the area on Church Road. History Historically, the region was part of the Deheubarth, Principality of Deheubarth until the Norman invasions between 1067 and 1101. From 1135 the Normans wrested the region from the Prince of Deheubarth and formed the basis for the Marcher Gower (Lordship), Lordship of Kilvey of comital rank. After the Laws in Wales Act 1535 abolished Marcher lordships, the region was incorporated into the county of Glamorgan. The parish of Llansamlet became part of the borou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
