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1 Packlage
f < bau> ■ bottoming -
2 Setzpacklage
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3 каменное основание дороги, уложенное на земляном полотне
Construction: Telford baseУниверсальный русско-английский словарь > каменное основание дороги, уложенное на земляном полотне
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4 пакелляж
Construction: Telford base, stone packing -
5 пакеляж
1) Engineering: Telford base2) Road works: hand-packed stone, hand-pitched stone, hand-pitched stone subbase, rubble bedding, rubble packing -
6 Smeaton, John
SUBJECT AREA: Civil engineering, Mechanical, pneumatic and hydraulic engineering, Steam and internal combustion engines[br]b. 8 June 1724 Austhorpe, near Leeds, Yorkshire, Englandd. 28 October 1792 Austhorpe, near Leeds, Yorkshire, England[br]English mechanical and civil engineer.[br]As a boy, Smeaton showed mechanical ability, making for himself a number of tools and models. This practical skill was backed by a sound education, probably at Leeds Grammar School. At the age of 16 he entered his father's office; he seemed set to follow his father's profession in the law. In 1742 he went to London to continue his legal studies, but he preferred instead, with his father's reluctant permission, to set up as a scientific instrument maker and dealer and opened a shop of his own in 1748. About this time he began attending meetings of the Royal Society and presented several papers on instruments and mechanical subjects, being elected a Fellow in 1753. His interests were turning towards engineering but were informed by scientific principles grounded in careful and accurate observation.In 1755 the second Eddystone lighthouse, on a reef some 14 miles (23 km) off the English coast at Plymouth, was destroyed by fire. The President of the Royal Society was consulted as to a suitable engineer to undertake the task of constructing a new one, and he unhesitatingly suggested Smeaton. Work began in 1756 and was completed in three years to produce the first great wave-swept stone lighthouse. It was constructed of Portland stone blocks, shaped and pegged both together and to the base rock, and bonded by hydraulic cement, scientifically developed by Smeaton. It withstood the storms of the English Channel for over a century, but by 1876 erosion of the rock had weakened the structure and a replacement had to be built. The upper portion of Smeaton's lighthouse was re-erected on a suitable base on Plymouth Hoe, leaving the original base portion on the reef as a memorial to the engineer.The Eddystone lighthouse made Smeaton's reputation and from then on he was constantly in demand as a consultant in all kinds of engineering projects. He carried out a number himself, notably the 38 mile (61 km) long Forth and Clyde canal with thirty-nine locks, begun in 1768 but for financial reasons not completed until 1790. In 1774 he took charge of the Ramsgate Harbour works.On the mechanical side, Smeaton undertook a systematic study of water-and windmills, to determine the design and construction to achieve the greatest power output. This work issued forth as the paper "An experimental enquiry concerning the natural powers of water and wind to turn mills" and exerted a considerable influence on mill design during the early part of the Industrial Revolution. Between 1753 and 1790 Smeaton constructed no fewer than forty-four mills.Meanwhile, in 1756 he had returned to Austhorpe, which continued to be his home base for the rest of his life. In 1767, as a result of the disappointing performance of an engine he had been involved with at New River Head, Islington, London, Smeaton began his important study of the steam-engine. Smeaton was the first to apply scientific principles to the steam-engine and achieved the most notable improvements in its efficiency since its invention by Newcomen, until its radical overhaul by James Watt. To compare the performance of engines quantitatively, he introduced the concept of "duty", i.e. the weight of water that could be raised 1 ft (30 cm) while burning one bushel (84 lb or 38 kg) of coal. The first engine to embody his improvements was erected at Long Benton colliery in Northumberland in 1772, with a duty of 9.45 million pounds, compared to the best figure obtained previously of 7.44 million pounds. One source of heat loss he attributed to inaccurate boring of the cylinder, which he was able to improve through his close association with Carron Ironworks near Falkirk, Scotland.[br]Principal Honours and DistinctionsFRS 1753.Bibliography1759, "An experimental enquiry concerning the natural powers of water and wind to turn mills", Philosophical Transactions of the Royal Society.Towards the end of his life, Smeaton intended to write accounts of his many works but only completed A Narrative of the Eddystone Lighthouse, 1791, London.Further ReadingS.Smiles, 1874, Lives of the Engineers: Smeaton and Rennie, London. A.W.Skempton, (ed.), 1981, John Smeaton FRS, London: Thomas Telford. L.T.C.Rolt and J.S.Allen, 1977, The Steam Engine of Thomas Newcomen, 2nd edn, Hartington: Moorland Publishing, esp. pp. 108–18 (gives a good description of his work on the steam-engine).LRD -
7 Metcalf, John
[br]b. 1717 Knaresborough, Yorkshire, England d. 1810[br]English pioneer road builder.[br]The son of poor working parents, at the age of 6 an attack of smallpox left him blind; however, this did not restrict his future activities, which included swimming and riding. He learned the violin and was much employed as the fiddle-player at country parties. He saved enough money to buy a horse on which he hunted. He took part in bowls, wrestling and boxing, being a robust six foot two inches tall. He rode to Whitby and went thence by boat to London and made other trips to York, Reading and Windsor. In 1740 Colonel Liddell offered him a seat in his coach from London to Harrogate, but he declined and got there more quickly on foot. He set up a one-horse chaise and a four-wheeler for hire in Harrogate, but the local innkeepers set up in competition in the public hire business. He went into the fish business, buying at the coast and selling in Leeds and other towns, but made little profit so he took up his violin again. During the rebellion of 1745 he recruited for Colonel Thornton and served to fight at Hexham, Newcastle and Falkirk, returning home after the Battle of Culloden. He then started travelling between Yorkshire, where be bought cotton and worsted stockings, and Aberdeen, where he sold horses. He set up a twice-weekly service of stage wagons between Knaresborough and York.In 1765 an Act was passed for a turnpike road between Harrogate and Boroughbridge and he offered to build the Master Surveyor, a Mr Ostler, three miles (5 km) of road between Minskip and Fearnly, selling his wagons and his interest in the carrying business. The road was built satisfactorily and on time. He then quoted for a bridge at Boroughbridge and for a turnpike road between Knaresborough and Harrogate. He built many other roads, always doing the survey of the route on his own. The roads crossed bogs on a base of ling and furze. Many of his roads outside Yorkshire were in Lancashire, Cheshire and Derbyshire. In all he built some 180 miles (290 km) of road, for which he was paid some £65,000.He worked for thirty years on road building, retiring in old age to a cotton business in Stockport where he had six spinning jennies and a carding engine; however, he found there was little profit in this so he gave the machinery to his son-in-law. The last road he built was from Haslington to Accrington, but due to the rise in labour costs brought about by the demand from the canal boom, he only made £40 profit on a £3,000 contract; the road was completed in 1792, when he retired to his farm at Spofforth at the age of 75. There he died, leaving a wife, four children, twenty grandchildren and ninety greatgrandchildren. His wife was the daughter of the landlord of the Granby Inn, Knaresborough.[br]Further ReadingS.Smiles, Lives of the Engineers, Metcalfe, Telford: John Murray.IMcN
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