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Caisson (lock Gate)
A caisson is a form of lock gate. It consists of a large floating iron or steel box. This can be flooded to seat the caisson in the opening of the dock to close it, or pumped dry to float it and allow it to be towed clear of the dock. Chevron gates Most locks are closed by chevron or mitre gates rather than by caissons. These are pairs of hinged gates that form a "V" shape, with the deeper water outside the V. Water pressure thus holds them closed. These gates can be opened and closed quickly, so they are used for canal locks, to change levels, and also for most freight docks. As the function of a freight dock is to ''enclose'' deep water, such gates point inwards. A graving or dry dock, in contrast, ''excludes'' water, and so their gates point outwards. Hinged gates are relatively complicated, and so expensive, to construct. Large gates require powered machinery to operate them, machinery that must be provided for each set of gates. Chevron gates can also only resist deep ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hellevoetsluis - Droogdok Jan Blanken - Schipdeur Dok Droog
Hellevoetsluis () is a small city and municipality in the western Netherlands. It is located in Voorne-Putten, South Holland. The municipality covers an area of of which is water and it includes the population centres Nieuw-Helvoet, Nieuwenhoorn, and Oude en Nieuwe Struiten, all former municipalities. Hellevoetsluis is located on the Haringvliet with the sea, beach, and dunes close by, on the extreme southern edge of the Rijnmond and Europoort areas, close to the broad Zeeland landscape. The name translates as "lock at the foot of the Helle". The Helle was a small local river that disappeared over time. History The area has been settled since before Roman times and was concentrated around a body of water called the "Helle", which was later Latinized by the Romans to "''Helinium''" and "''Helius''". The name Hel(le) Voet, ''Helius' foot'' or "(land at) the lowest point of Helius", appears in documents from the 13th century and later, such as in 1395, when the Nieuw-Helvoet Polde ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chepstow Railway Bridge
Chepstow Railway Bridge was built to the instructions of Isambard Kingdom Brunel in 1852. The "Great Tubular Bridge" over the River Wye at Chepstow, which at that point forms the boundary between Wales and England, is considered one of Brunel's major achievements, despite its appearance. It was economical in its use of materials, and would prove to be the design prototype for Brunel's Royal Albert Bridge at Saltash. Although the superstructure has since been replaced, Brunel's tubular iron supports are still in place. It is a Grade II listed structure. Background Brunel had to take the two tracks of the South Wales Railway across the River Wye. The Admiralty had insisted on a clear span over the river, with the bridge a minimum of above high tide. The span would have to be self-supporting, since although the Gloucestershire side of the river consists of a limestone cliff, the Monmouthshire side is low-lying sedimentary deposit subject to regular flooding. Thus on that sid ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caisson Lock
The caisson lock is a type of canal lock in which a narrowboat is floated into a sealed watertight box and raised or lowered between two different canal water levels. It was invented in the late 18th century as a solution to the problem posed by the excessive demand for water when conventional locks were used to raise and lower canal boats through large height differences. Such locks, each of which would only raise and lower boats through small height differences of a few feet, would not suffice when large height differences had to be tackled nor when water was in short supply. The caisson (or ) was thought to be one solution, although it transpired that the technology of the day was not capable of achieving this type of construction economically. It was designed primarily as a water-saving measure, and also was an attempt to minimise construction costs compared with other engineering solutions of the time. In use it was capable of replacing up to seven conventional locks. Othe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caisson No
{{disambiguation ...
Caisson (French for "box") may refer to: * Caisson (Asian architecture), a spider web ceiling * Caisson (engineering), a sealed underwater structure * Caisson (lock gate), a gate for a dock or lock, constructed as a floating caisson * Caisson (pen name), of Edward Sperling * Caisson (western architecture), a type of coffer * Caisson disease, or decompression sickness * Caisson lock, a type of canal lock * Deep foundation, also called a caisson foundation * Limbers and caissons, a two-wheeled cart for carrying ammunition, also used in certain state and military funerals See also * Kazon, a fictional alien race in ''Star Trek'' * Khe Sanh Khe Sanh is the district capital of Hướng Hoá District, Quảng Trị Province, Vietnam, located 63 km west of Đông Hà. During the Vietnam War, the Khe Sanh Combat Base was located to the north of the city. The Battle of Khe San ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isambard Kingdom Brunel
Isambard Kingdom Brunel (; 9 April 1806 – 15 September 1859) was a British civil engineer who is considered "one of the most ingenious and prolific figures in engineering history," "one of the 19th-century engineering giants," and "one of the greatest figures of the Industrial Revolution, hochanged the face of the English landscape with his groundbreaking designs and ingenious constructions." Brunel built dockyards, the Great Western Railway (GWR), a series of steamships including the first propeller-driven transatlantic steamship, and numerous important bridges and tunnels. His designs revolutionised public transport and modern engineering. Though Brunel's projects were not always successful, they often contained innovative solutions to long-standing engineering problems. During his career, Brunel achieved many engineering firsts, including assisting in the building of the first tunnel under a navigable river (the River Thames) and the development of the , the f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cumberland Basin (Bristol)
The Cumberland Basin is the main entrance to the docks of the city of Bristol, England. It separates the areas of Hotwells from the tip of Spike Island. History The River Avon never flowed through the Cumberland Basin. Before the 19th century improvements and the construction of the non-tidal Floating Harbour, the Avon flowed through the tidal harbour and out through the future location of the Underfall Yard. When the basin and Floating Harbour were constructed the river was diverted through the New Cut, bypassing the harbour entirely. Following competition from other ports, in 1802 William Jessop proposed installing a dam and lock at Hotwells to create the harbour. The £530,000 scheme was approved by Parliament, and construction began in May 1804. The scheme included the construction of the Cumberland Basin, a large wide stretch of the harbour in Hotwells where the Quay walls and bollards have listed building status. The new scheme required a way to equalise the leve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Capstan (nautical)
A capstan is a vertical-axled rotating machine developed for use on sailing ships to multiply the pulling force of seamen when hauling ropes, cables, and hawsers. The principle is similar to that of the windlass, which has a horizontal axle. History The word, connected with the Old French ''capestan'' or ''cabestan(t)'', from Old Provençal ''cabestan'', from ''capestre'' "pulley cord," from Latin ''capistrum'', -a halter, from ''capere'', to take hold of, seems to have come into English (14th century) from Portuguese or Spanish shipmen at the time of the Crusades. Both device and word are considered Spanish inventions. Early form In its earliest form, the capstan consisted of a timber mounted vertically through a vessel's structure which was free to rotate. Levers, known as bars, were inserted through holes at the top of the timber and used to turn the capstan. A rope wrapped several turns around the drum was thus hauled upon. A rudimentary ratchet was provided to hold ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
North Sea
The North Sea lies between Great Britain, Norway, Denmark, Germany, the Netherlands and Belgium. An epeiric sea, epeiric sea on the European continental shelf, it connects to the Atlantic Ocean through the English Channel in the south and the Norwegian Sea in the north. It is more than long and wide, covering . It hosts key north European shipping lanes and is a major fishery. The coast is a popular destination for recreation and tourism in bordering countries, and a rich source of energy resources, including wind energy, wind and wave power. The North Sea has featured prominently in geopolitical and military affairs, particularly in Northern Europe, from the Middle Ages to the modern era. It was also important globally through the power northern Europeans projected worldwide during much of the Middle Ages and into the modern era. The North Sea was the centre of the Viking Age, Vikings' rise. The Hanseatic League, the Dutch Golden Age, Dutch Republic, and the Kingdom of Grea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zeebrugge Canal
Zeebrugge (, from: ''Brugge aan zee'' meaning "Bruges at Sea", french: Zeebruges) is a village on the coast of Belgium and a subdivision of Bruges, for which it is the modern port. Zeebrugge serves as both the international port of Bruges-Zeebrugge and a seafront resort with hotels, cafés, a marina and a beach. Location Zeebrugge is located on the coast of the North Sea. Its central location on the Belgian coast, short distance to Great Britain and close vicinity to densely populated industrialised cities make it a crossroads for traffic from all directions. An expressway to Bruges connects Zeebrugge to the European motorway system; one can also get to and from Zeebrugge by train or tram. A 12 km canal links the port to the centre of Bruges. It is Belgium's most important fishing port and the wholesale fish market located there is one of the largest in Europe. Aside from being a passenger terminal with ferries to the United Kingdom, the harbour serves as the central po ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Decline Of Cardiff Docks
{{disambiguation ...
Decline may refer to: *Decadence, involves a perceived decay in standards, morals, dignity, religious faith, or skill over time * "Decline" (song), 2017 song by Raye and Mr Eazi * ''The Decline'' (EP), an EP by NOFX *The Decline (band), Australian skate punk band from Perth * ''The Decline'' (film), a 2020 Canadian thriller drama film See also *Declination (other) *Declinism *Decline and Fall (other) * Decline of the Roman Empire *Decline of Detroit *Ottoman decline thesis *''The Decline of the West'' by Oswald Spengler *Social disintegration, *Societal collapse *Withering away of the state Withering away of the state is a Marxist concept coined by Friedrich Engels referring to the idea that, with the realization of socialism, the state will eventually become obsolete and cease to exist as society will be able to govern itself without ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Louis XV Of France
Louis XV (15 February 1710 – 10 May 1774), known as Louis the Beloved (french: le Bien-Aimé), was King of France from 1 September 1715 until his death in 1774. He succeeded his great-grandfather Louis XIV at the age of five. Until he reached maturity (then defined as his 13th birthday) on 15 February 1723, the kingdom was ruled by his grand-uncle Philippe II, Duke of Orléans, as Regent of France. Cardinal Fleury was chief minister from 1726 until his death in 1743, at which time the king took sole control of the kingdom. His reign of almost 59 years (from 1715 to 1774) was the second longest in the history of France, exceeded only by his predecessor, Louis XIV, who had ruled for 72 years (from 1643 to 1715). In 1748, Louis returned the Austrian Netherlands, won at the Battle of Fontenoy of 1745. He ceded New France in North America to Great Britain and Spain at the conclusion of the disastrous Seven Years' War in 1763. He incorporated the territories of the Duchy of Lo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
