Spiral viaduct of the Bernina Express near Brusio, Switzerland.

A spiral (sometimes called a spiral loop or just loop) is a technique employed by railways to ascend steep hills.

A railway spiral rises on a steady curve until it has completed a loop, passing over itself as it gains height, allowing the railway to gain vertical elevation in a relatively short horizontal distance. It is an alternative to a zig-zag, and avoids the need for the trains to stop and reverse direction while ascending. If the train is longer than the length of each loop it may be possible to view it looping above itself.[1][2]

The term "loop" is also often used for a railway that curves sharply and goes back on itself: if the railway crosses itself, then it forms a spiral or helix; otherwise, it forms the much more common horseshoe curve or bend.[3][4]

List of spirals

Argentina

Australia

Bulgaria

Canada

China

Guanjiao Spiral on Qinghai–Tibet Railway at night, it was replaced by a 32-km long tunnel in 2014

Costa Rica

Replica of the Brusio Spiral Viaduct at 10°28′44″N 84°49′25″W / 10.47900°N 84.82374°W / 10.47900; -84.82374 on the Tren Turistico Arenal, 10 km east of Nuevo Arenal, Guanacaste.[38][39]

Croatia

Eritrea

France

Germany

India

Loop (Agony Point) on the DHR, India

The Darjeeling Himalayan Railway originally had five or six spirals but only five in operation at any one time. The line also has six reverses or zig-zags.[56][57]

Iran

Ireland

Italy

Japan

Okoba spiral and zig zag in Hisatsu Line, Japan

Kenya

There are three spirals on the 1,000 mm (3 ft 3+3⁄8 in) gauge railway line from Kenya to Uganda. This railway has been superseded by the Mombasa–Nairobi Standard Gauge Railway, which has removed the need for spirals by constructing tunnels and bridges.[73][74][75][76]

Madagascar

Mexico

Myanmar

Spiral in Thazi – Taunggyi line, Myanmar

New Zealand

Norway

Peru

Russia

Serbia

Slovakia

South Africa

South Korea

Geumdae 2nd Tunnel in Jungang Line, South Korea

Spain

Sri Lanka

Switzerland

Toua spiral tunnel on the RhB Albulabahn

Taiwan

Triple spiral loop on the Alishan Forest Railway

Uganda

United Kingdom

The bridge on the spiral loop at Dduallt on the Ffestiniog Railway, Wales.

United States

Tehachapi Loop, on the Union Pacific Railroad, California, United States, viewed from the air.
1903 view of Riflesight Notch loop, near Rollins Pass in Colorado

See also

References

  1. ^ Christian Wolmar (1 May 2014). The Iron Road: The Illustrated History of Railways. Dorling Kindersley Limited. pp. 170–. ISBN 978-0-241-18186-7.
  2. ^ S. M. Yameen Nachsch (1972). Railway Engineering. Caravan Book House.
  3. ^ William W. Hay (16 June 1982). Railroad Engineering. John Wiley & Sons. pp. 231–. ISBN 978-0-471-36400-9.
  4. ^ Jim Harter (2005). World Railways of the Nineteenth Century: A Pictorial History in Victorian Engravings. JHU Press. ISBN 978-0-8018-8089-6.
  5. ^ a b c John Brian Hollingsworth (1982). Atlas of the world's railways. Bison. ISBN 9780811904681.
  6. ^ Axel Borsdorf; Christoph Stadel (12 March 2015). The Andes: A Geographical Portrait. Springer. pp. 273–. ISBN 978-3-319-03530-7.
  7. ^ Pons, Mónica. "The Train to the Clouds, Salta". Welcome Argentina. Retrieved 13 December 2017.
  8. ^ The Australian encyclopaedia. Michigan State University Press. 1958.
  9. ^ "Bethungra Spiral". Heritage Council of New South Wales.
  10. ^ "Cougal To Border Loop, Railway Spiral and Landscape". New South Wales State Heritage Register. Department of Planning & Environment. Retrieved 25 November 2017. Text is licensed by State of New South Wales (Department of Planning and Environment) under CC-BY 4.0 licence.
  11. ^ William Alan Bayley (1973). Standard Gauge Railway Across Australia. Austrail Publications. ISBN 978-0-909597-09-2.
  12. ^ a b c d Brendan Fox; et al. (2011). The Thomas Cook Rail Map of Europe (Map) (18th ed.). 1:4000000. Cartography by Mary Spence. Thomas Cook Publishing. ISBN 978-1-84848-356-9.
  13. ^ a b c d Ball, Mike (20 March 2017). European Railway Atlas Regional Series, Romania, Bulgaria and Moldova.
  14. ^ a b c d e f g Ball, Mike (1 May 2016). European Railway Atlas.
  15. ^ a b c Подробна карта на България (A detailed Map of Bulgaria) (Map). 1:380000. ДатаМап-Европа ООД (DataMap Europe). 2014. ISBN 978-954-519-036-0.
  16. ^ Jane's World Railways. Sampson Low, Marston; New York: Rand McNally. 1960.
  17. ^ Graeme Pole (1 January 1995). The Spiral Tunnels and the Big Hill: A Canadian Railway Adventure. Altitude Publishing Canada Limited. ISBN 978-1-55153-907-2.
  18. ^ Barry D. Stewart (2004). Across the Land --a Canadian Journey of Discovery. Trafford Publishing. pp. 224–. ISBN 978-1-4120-2276-7.
  19. ^ L.D. Cross (21 July 2014). High Peaks Engineering: Rocky Mountain Marvels. Heritage House Publishing Co. pp. 93–. ISBN 978-1-927527-80-1.
  20. ^ Les Harding (5 February 2008). The Newfoundland Railway, 1898-1969: A History. McFarland. pp. 86–. ISBN 978-1-4766-0839-6.
  21. ^ Heritage Foundation of Newfoundland and Labrador (January 2011). "Trinity Train Loop". Retrieved 25 October 2017.
  22. ^ Heritage Foundation of Newfoundland and Labrador. "Trinity Train Loop Registered Heritage Structure". Retrieved 25 October 2017.
  23. ^ Art Downs (1 May 1985). Incredible Rogers Pass. Heritage House Publishing Co. pp. 27–. ISBN 978-0-919214-08-8.
  24. ^ "Qingshiya station". China Railway Map. Retrieved 26 August 2019.
  25. ^ a b c d e Quail Map Company (2008). China Railway Atlas (third ed.). Quail Map Company. ISBN 978-1-898319-82-5.
  26. ^ "Baishiyan station". China Railway Map. Retrieved 26 August 2019.
  27. ^ "Lewu station". China Railway Map. Retrieved 26 August 2019.
  28. ^ "Wazu station". China Railway Map. Retrieved 26 August 2019.
  29. ^ "Tiekou station". China Railway Map. Retrieved 26 August 2019.
  30. ^ "Ananzhuang station". China Railway Map. Retrieved 26 August 2019.
  31. ^ "Longgudian station". China Railway Map. Retrieved 26 August 2019.
  32. ^ "Daheba station". China Railway Map. Retrieved 26 August 2019.
  33. ^ "Maocaoping station". China Railway Map. Retrieved 26 August 2019.
  34. ^ "Duchuanzhai station". China Railway Map. Retrieved 26 August 2019.
  35. ^ "Sanjiazhai station". China Railway Map. Retrieved 26 August 2019.
  36. ^ Yuan Lei (2014-12-29). "袁蕾, 吐库二线正式开通运营 南疆铁路进入电气化时代 新疆日报" [Yuan Lei, spit library second-tier official opening and operation of the Southern Xinjiang Railway electrification into the Xinjiang Daily Times (Machine generated)] (in Chinese). Archived from the original on August 22, 2016. Retrieved 2016-07-04.
  37. ^ "Long Tunnels". European Tribune. 12 June 2016. Retrieved 18 November 2020.
  38. ^ Devereux, Nigel (September 2017). "Costa Rican rail variety". The Railway Magazine. Mortons Media Group Ltd.: 104.
  39. ^ "Friends of Latin American Railways". Retrieved 13 November 2018.
  40. ^ a b Ball, Mike (3 September 2017). European Railway Atlas Regional Series, The Balkans.
  41. ^ a b Benjaminse Uitgeverij BV (2013). A Travellers' Railway map of Europe (Map) (3rd ed.). 1:3800000. Cartography by Carto Studio BV. Benjaminse Uitgeverij BV. ISBN 978-90-77899-09-0.
  42. ^ a b c d e Ball, Mike (15 July 2016). European Railway Atlas Regional Series, Italy.
  43. ^ a b Braun, Michel (April 2017). "The Col de Tende Line: A tortuous route and history". Today's Railways Europe. Sheffield, England: Platform 5 Publishing.
  44. ^ a b c Michelin Editions des Voyages. Michelin. 10 January 2011. ISBN 978-2-06-715561-9.
  45. ^ "La Boucle Loop Tunnel". Structurae:International Database and Gallery of Structures. Retrieved 15 December 2017.
  46. ^ "Moûtiers, très ferroviphile en 2013 !". Actu Montagne. The Serac Editions. Retrieved 15 December 2017.
  47. ^ a b c d Ian Allan Publishing (20 March 2015). Rail Atlas Europe. Ian Allan Publishing. ISBN 978-0-7110-3808-0.
  48. ^ "Tunnel deVigue" (PDF). Invetaire des tunnels ferroviaires de France. Retrieved 12 August 2019.
  49. ^ Ball, Mike (15 February 2019). European Railway Atlas Regional Series, Spain & Portugal.
  50. ^ "Tunnel de Saillens" (PDF). Invetaire des tunnels ferroviaires de France. Retrieved 6 September 2020.
  51. ^ "Tunnel de Sayerce" (PDF). Invetaire des tunnels ferroviaires de France. Retrieved 24 June 2016.
  52. ^ C. Harald Harlinghausen; Hartmuth Merleker (1986). Germany Federal Republic. Nagel. ISBN 978-2-8263-0761-7.
  53. ^ W.J.K.Davies (1965). Railway Holiday in Northern Germany. David and Charles.
  54. ^ Great Britain. Naval Intelligence Division (1945). Germany: Ports and communications. Naval Intelligence Division.
  55. ^ a b c Terry Martin (2006). The Iron Sherpa: The Story of the Darjeeling Himalayan Railway, 1879-2006. The Iron Sherpa by T. Martin. ISBN 978-1-900622-10-3.
  56. ^ Going Loopy. Darjeeling Himalayan Railway Society. 2005. ISBN 0-9541602-2-3.
  57. ^ UNESCO World Heritage. "Mountain Railways of India". Retrieved 7 November 2017.
  58. ^ The Great Indian Railway Atlas. Samit Roychoudhury. 2005. ISBN 81-901457-0-3.
  59. ^ Hugh Hughes (1981). Middle East railways. Continental Railway Circle. ISBN 9780950346977.
  60. ^ Ellison, Paul (December 1968). "Guinness Brewery Tramways". The Industrial Railway Record. The Industrial Railway Society. pp. 337–347. Retrieved 8 December 2017.
  61. ^ Peaty, Ian P. (1985). Brewery Railways. Newton Abbot: David and Charles. pp. 42–43. ISBN 0-7153-8605-0.
  62. ^ a b c d e f Atlante Stradale Italia (Road Atlas). Instituto Geografico DeAgostini. 2009. ISBN 9788851114398.
  63. ^ a b John Organ (November 2013). Sardinia and Sicily Narrow Gauge. Middleton Press. ISBN 978-1-908174-50-5.
  64. ^ "THE SIMPLON TUNNEL". The Capricornian. Rockhampton, Qld: National Library of Australia. 15 October 1904. p. 21. Retrieved 19 March 2013.
  65. ^ P. M. Kalla-Bishop (1967). Railway Holiday in Italy. David & Charles.
  66. ^ P. M. Kalla-Bishop (1970). Mediterranean island railways. A. M. Kelley. p. 47. ISBN 9780678056530.
  67. ^ a b Ovenden, Mark (2007). Transit maps of the world. London: Penguin Books. ISBN 978-0-14-311265-5.
  68. ^ "Map of Naples Metro 2017" (PDF). Azienda Napoletana Mobilità (ANM). Retrieved 21 January 2018.
  69. ^ "The route of the former railway Spoleto-Norcia". Bella Umbria. Retrieved 16 December 2017.
  70. ^ a b c A History of Japanese Railways, 1872-1999. East Japan Railway Culture Foundation. 2000. ISBN 978-4-87513-089-5.
  71. ^ a b c d e f Shobunsha (2012). All-Japan Road Atlas. 昭文社. ISBN 978-4-398-60034-9.
  72. ^ a b National Defense Transportation Journal. National Defense Transportation Association. 1953.
  73. ^ "Kenya opens Nairobi-Mombasa Madaraka Express railway". BBC News. 31 May 2017. Retrieved 22 December 2017.
  74. ^ Ruthi, William (8 May 2017). "Last ride on the Lunatic Express". Daily Nation.
  75. ^ "End of the line for 'Lunatic Express?' Kenya begins multi-billion dollar railway". CNN News. 6 January 2014. Retrieved 22 December 2017.
  76. ^ "Kenya's new Madaraka Express railway in pictures". BBC News. 31 May 2017. Retrieved 22 December 2017.
  77. ^ "Voyages train voyageur (in French)". Madarail. Retrieved 16 December 2017.
  78. ^ Middleton, William D.; Smerk, George M.; Diehl, Roberta L., eds. (2007). Encyclopedia of North American Railroads. Bloomington: Indiana University Press. p. 248. ISBN 978-0-253-34916-3.
  79. ^ Joseph Wampler (1969). New Rails to Old Towns: The Region and Story of the Ferrocarriles Chihuahua Al Pacífico. The Author.
  80. ^ Lonely Planet (1 August 2014). Great Journeys: Travel the World's Most Spectacular Routes. Lonely Planet Publications. ISBN 978-1-74360-593-6.
  81. ^ "On Burma Corporation Ltd". Australasian Institute of Mining and Metallurgy. Australasian Institute of Mining Engineers: 91. 1922. Retrieved 23 December 2017.
  82. ^ "Railway Gazette International". Railway Gazette International. Reed Business Pub. 66. 1937. Retrieved 23 December 2017.
  83. ^ Dickinson, Rob. "The Burma Mines Railway 1999". The International Steam Pages. Retrieved 8 December 2017.
  84. ^ Colin Metcalfe Enriquez (1935). Beautiful Burma. Myanmahita Magazine.
  85. ^ Bill Pierre (1 January 1981). North Island Main Trunk: An Illustrated History. A.H. & A.W. Reed. ISBN 978-0-589-01316-5.
  86. ^ a b c d e f g h Nock O.S. (1978). World Atlas of Railways. Mitchell Beazley. ISBN 0-86134-003-5.
  87. ^ Lang, Sarah (7 June 2009). "Coromandel: Water world". The New Zealand Herald. Retrieved 13 December 2017.
  88. ^ Mahoney, Paul (24 Sep 2007). "Bush trams and other log transport - Curves, trestles and inclines". Te Ara - the Encyclopedia of New Zealand. Retrieved 13 December 2017.
  89. ^ Owen, Roy (1996). Norwegian railways : from Stephenson to high speed. Hitchin: Balholm Press. p. 159. ISBN 0-9528069-0-8. OCLC 43127416.
  90. ^ Sigurd H. Unneberg, Sem og Slagen, en bygdebok Bind 2, Kulturhistorie, del 2 . Tønsberg: Høgskolen i Vestfold, 2001. Relevant chapter is online here Archived 2016-03-03 at the Wayback Machine (in Norwegian)
  91. ^ Popov, Yuri. "Severo-Kavkazskaya Railroad, 06-05 Sochi". Railroad Maps. University of Michigan. Retrieved 23 November 2020.
  92. ^ "Большой петлевой тоннель [Large loop tunnel]". BAMTONNELSTROY (in Russian). Archived from the original on 21 November 2019. Retrieved 7 September 2020.
  93. ^ South Africa; South Africa. Railways and Harbours Board (1947). Their Majesties the King and Queen and Their Royal Highnesses the Princess Elizabeth and the Princess Margaret in the Union of South Africa: February-April 1947. South African Railways.
  94. ^ Guide to Southern Africa. S. Low, Marston & Company. 1971.
  95. ^ "Kei Rail revival will support regional development". Railway Gazette International. 1 July 2008. Retrieved 23 December 2017.
  96. ^ Openbare Werke, Anleg, en Vervoer. Thomson Publications. 1959.
  97. ^ "NATAL-ORANGE FREE STATE railway link". The Railway Gazette. 115: 343. July 1961.
  98. ^ John R. Shorten; Johannesburg (South Africa). City Council (1970). The Johannesburg saga. John R. Shorten (Proprietary) ltd.
  99. ^ a b Quail Map Company (1996). Korea, North and South Railway Map (Map). Quail Map Company. ISBN 978-1-898319-21-4.
  100. ^ "Design/Construction Package Yeongdong Line Relocation (Dongbaeksan - Dogye)". Sambo Engineering. Archived from the original on 22 July 2011. Retrieved 7 September 2020.
  101. ^ "Detailed design of Yeongdong Line for railway moving establishment construction work between Dongbaeksan and Dogye". Chunsuk Engineering. Archived from the original on 22 July 2011. Retrieved 7 September 2020.
  102. ^ Lee, Myung-woo (23 June 2020). "중앙선 원주~제천 복선전철 시운전 돌입…연말 개통" [Joongang Line Wonju-Jecheon double-track train trial run... year-end opening].
  103. ^ a b Collins Road Atlas: Spain and Portugal (Road Atlas). Collins. 2002. ISBN 0007140738.
  104. ^ "159-II" (Map). Torre del Bierzo (2nd ed.). 1:25000. Mapa Topografico Nacional de Espana. 2002.
  105. ^ P. N. Cumaranatunga (2009). Patriots of Lanka. P.N. Cumaranatunga. ISBN 978-955-658-116-4.
  106. ^ Ratnasinghe, Aryadasa. "Train to Badulla". The Sunday Times - Sri Lanka. Retrieved 13 December 2017.
  107. ^ a b c d e f g h i Ball, Mike (15 July 2016). European Railway Atlas Regional Series, Switzerland.
  108. ^ a b c d e John Westwood (2009). The Historical Atlas of World Railways. Cartographica Press. ISBN 978-1-84573-428-2.
  109. ^ Anthony J. Lambert (2005). Switzerland: Rail, Road, Lake. Bradt Travel Guides. ISBN 978-1-84162-132-6.
  110. ^ Quail Map Company (1 January 1993). China Railway Atlas (first ed.). Quail Map Company. ISBN 978-0-900609-94-7.
  111. ^ The Taiwan Railway 1966-1970. Loren Aandahl. 2011. ISBN 978-0-615-39162-5.
  112. ^ Mohamed Amin; Alastair Matheson; Duncan Willetts (1986). Railway across the Equator: the story of the East African line. Bodley Head. ISBN 978-0-370-30774-9.
  113. ^ G. T. Heavyside (1980). Narrow Gauge Into the Eighties. David and Charles. ISBN 978-0-7153-7979-0.
  114. ^ a b S. K. Baker (2010). Rail Atlas Great Britain and Ireland. Oxford Publishing Company. ISBN 978-0-86093-632-9.
  115. ^ Ian Allan Publishing (1982). Pre-Grouping Railway Junction Diagrams 1914. Ian Allan Publishing. ISBN 978-0-7110-1256-1.
  116. ^ P. R. Griswold (1992). Railroads of California: Seeing the State by Rail. American Traveler Press. ISBN 978-1-55838-121-6.
  117. ^ J. David Ingles (2001). Guide to North American Railroad Hot Spots. Kalmbach Publishing, Co. ISBN 978-0-89024-373-2.
  118. ^ Brian Solomon (2003). Burlington Northern Santa Fe Railway. Voyageur Press. ISBN 978-1-61060-361-4.
  119. ^ Maury Klein (1972). History of the Louisville & Nashville Railroad. University Press of Kentucky. ISBN 0-8131-2915-X.
  120. ^ Phelps R. Griswold; Bob Griswold (1988). Railroads of Colorado: A Guide to Modern and Narrow Gauge Trains. American Traveler Press. ISBN 978-1-55838-088-2.
  121. ^ John William Howard (October 26, 2017). "TriMet considering expansion of MAX Red Line to county fairgrounds". Portland Tribune. Retrieved 2018-01-15.
  122. ^ Prince, B.D.The Alaska Railroad in Pictures 1914-1964; Ken Wray's Print Shop, Anchorage, 1964
  123. ^ R. A. LeMassena (June 1984). Colorado's mountain railroads. Smoking Stack Press.
  124. ^ "D&RGW Tintic Branch History". Retrieved 2016-09-13.
  125. ^ "Railroads and Mining at Tintic". Retrieved 2016-09-13.
  126. ^ "Eureka Ghost Rail: Tintic Range Railroad". Retrieved 2016-09-13.
  127. ^ Beniam Kifle; Nathan Goodman (2013). Roaring Camp Railroads. Arcadia Publishing. ISBN 978-1-4671-2996-1.

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