The Drøyli Tunnel is 1,181-meter (3,875 ft) railway tunnel in the municipality of Holtålen in Trøndelag county, Norway. The tunnel goes through the Drøyliene mountain, just east of the river Gaula. The tunnel carries a single, non-electrified track of the Røros Line. It is located about half-way between the villages of Haltdalen and Renbygda.
The line past Drøyliene was originally planned with several viaducts. During construction it was decided to instead build the line as a series of cuttings and six tunnels. Tamlaget Tunnel was the longest, at 204 meters (669 ft). This section opened on 16 January 1877. The original right-of-way through Drøyliene was plagued with rock slides and would fill with snow during winter. Proposals for replacing it with a tunnel were first made in 1924, but work did not start until 1937, in conjunction with the gauge conversion of the railway. The break-through took place in 1943 and the tunnel opened on 7 July 1945.
The Drøyli Tunnel has a length of 1,181 meters (3,875 ft) and carries a single track of non-electrified, standard gauge railway. Situated on the Røros Line, the southern end is situated 446.09 kilometers (277.19 mi) from Oslo Central Station.[1]
Historyedit
During the construction of the Røros Line between 1872 and 1877, the section past Drøyliene proved to be one of the most challenging to build. The originally surveyed route consisting of a series of viaducts had to be abandoned in favor of blasting the route out of bedrock. This was done through a mix of cuttings and tunnels.[2] Construction was made more difficult after it was discovered that the quarry near by which did not meet standards, and that stone and gravel had to be transported up to 50 kilometers (31 mi) to the site. By June 1975 the line was completed to Drøya Bridge, allowing the stones and gravel to be transported by train.[3] The work resulted in six short tunnels, measuring from 18 to 204 meters (59 to 669 ft) in length. There was also a narrow curve with a radius of 205 meters (673 ft).[4] The longest, Tamlaget Tunnel, was on the line's opening on 16 January 1877 the second-longest railway tunnel in Norway.[2] None of the shorter tunnels received names.[4]
The section was prone to landslides during the summer and heavy snowfall during the winter, making it an operational headache for the Norwegian State Railways. The particularities of Drøyliene meant that as little snowfall as 5 to 10 centimeters (2 to 4 in) could be caught by the wind and blown into and filling the cutting, hindering traffic or causing trains to get stuck.[5] Proposals for replacing the section was made as early as 1924. The proposal called for a 526-meter (1,726 ft) tunnel.[5] No funding was granted, and the plans were shelved until the decision for the Røros Line to receive gauge conversion to standard gauge. The 1935 decision called for a longer tunnel, which would be built as a branch of the existing Tamlaget Tunnel. The new tunnel became 1,181 meters (3,875 ft) long, with the southernmost 146 meters (479 ft) being common with the old tunnel.[4]
Construction commenced in the fall of 1937, with the tunnel hand drilled from both ends. Machine drilling was taken into use on the northern end on the northern side from the summer of 1938. The work on the Drøyli Tunnel was not finished in time for the gauge conversion in 1941, causing the cutting to have to be expanded. The tunnel's breakthrough occurred in 1943 and it could be taken into use on 7 July 1945. The tunnel shortened the Røros Line 276 meters (906 ft).[4]
The tracks along Drøyliene were removed, but the telecommunication line was kept. The right-of-way and telecommunication lines have been listed as cultural heritage as remnants of the original narrow-gauge route of the Rørøs Line. The listing involves that the route is kept free of vegetation, loose rock is removed from the mountainside and the telephone cables and masts are retained.[6]
drøyli, tunnel, meter, railway, tunnel, municipality, holtålen, trøndelag, county, norway, tunnel, goes, through, drøyliene, mountain, just, east, river, gaula, tunnel, carries, single, electrified, track, røros, line, located, about, half, between, villages, . The Droyli Tunnel is 1 181 meter 3 875 ft railway tunnel in the municipality of Holtalen in Trondelag county Norway The tunnel goes through the Droyliene mountain just east of the river Gaula The tunnel carries a single non electrified track of the Roros Line It is located about half way between the villages of Haltdalen and Renbygda Droyli TunnelOverviewLineRorosbanenLocationTrondelag NorwayCoordinates62 52 53 N 11 11 21 E 62 8814 N 11 1892 E 62 8814 11 1892StatusIn useSystemNorwegian railwaysOperationOpened7 July 1945 1945 07 07 OwnerBane NOROperatorNorwegian Railway DirectorateTrafficRailTechnicalLength1 181 m 3 875 ft No of tracksSingleTrack gauge1 435 mm 4 ft 8 1 2 in ElectrifiedNo The line past Droyliene was originally planned with several viaducts During construction it was decided to instead build the line as a series of cuttings and six tunnels Tamlaget Tunnel was the longest at 204 meters 669 ft This section opened on 16 January 1877 The original right of way through Droyliene was plagued with rock slides and would fill with snow during winter Proposals for replacing it with a tunnel were first made in 1924 but work did not start until 1937 in conjunction with the gauge conversion of the railway The break through took place in 1943 and the tunnel opened on 7 July 1945 Contents 1 Specifications 2 History 3 Bibliography 4 ReferencesSpecifications editDroyli Tunnel Legend nbsp 447 30 km Droyliene 1876 1945 nbsp nbsp 447 46 km Tunnel 68 m nbsp nbsp 447 36 km Tunnel 19 m nbsp nbsp 447 04 km Tunnel 72 m nbsp nbsp 446 88 km Tunnel 18 m nbsp nbsp 446 76 km Tunnel 18 m nbsp nbsp 446 09 km Droyli Tunnel 1181 m nbsp 446 07 km Tamlaget Tunnel 204 m nbsp The Droyli Tunnel has a length of 1 181 meters 3 875 ft and carries a single track of non electrified standard gauge railway Situated on the Roros Line the southern end is situated 446 09 kilometers 277 19 mi from Oslo Central Station 1 History editDuring the construction of the Roros Line between 1872 and 1877 the section past Droyliene proved to be one of the most challenging to build The originally surveyed route consisting of a series of viaducts had to be abandoned in favor of blasting the route out of bedrock This was done through a mix of cuttings and tunnels 2 Construction was made more difficult after it was discovered that the quarry near by which did not meet standards and that stone and gravel had to be transported up to 50 kilometers 31 mi to the site By June 1975 the line was completed to Droya Bridge allowing the stones and gravel to be transported by train 3 The work resulted in six short tunnels measuring from 18 to 204 meters 59 to 669 ft in length There was also a narrow curve with a radius of 205 meters 673 ft 4 The longest Tamlaget Tunnel was on the line s opening on 16 January 1877 the second longest railway tunnel in Norway 2 None of the shorter tunnels received names 4 The section was prone to landslides during the summer and heavy snowfall during the winter making it an operational headache for the Norwegian State Railways The particularities of Droyliene meant that as little snowfall as 5 to 10 centimeters 2 to 4 in could be caught by the wind and blown into and filling the cutting hindering traffic or causing trains to get stuck 5 Proposals for replacing the section was made as early as 1924 The proposal called for a 526 meter 1 726 ft tunnel 5 No funding was granted and the plans were shelved until the decision for the Roros Line to receive gauge conversion to standard gauge The 1935 decision called for a longer tunnel which would be built as a branch of the existing Tamlaget Tunnel The new tunnel became 1 181 meters 3 875 ft long with the southernmost 146 meters 479 ft being common with the old tunnel 4 Construction commenced in the fall of 1937 with the tunnel hand drilled from both ends Machine drilling was taken into use on the northern end on the northern side from the summer of 1938 The work on the Droyli Tunnel was not finished in time for the gauge conversion in 1941 causing the cutting to have to be expanded The tunnel s breakthrough occurred in 1943 and it could be taken into use on 7 July 1945 The tunnel shortened the Roros Line 276 meters 906 ft 4 The tracks along Droyliene were removed but the telecommunication line was kept The right of way and telecommunication lines have been listed as cultural heritage as remnants of the original narrow gauge route of the Roros Line The listing involves that the route is kept free of vegetation loose rock is removed from the mountainside and the telephone cables and masts are retained 6 Bibliography editBjerke Thor Stenersen Roar 2004 Rorosbaneboka in Norwegian Hamar Norwegian Railway Museum Norwegian Railway Club ISBN 82 90286 24 4 Bjerke Thor Holom Finn 2004 Banedata 2004 in Norwegian Hamar Oslo Norwegian Railway Museum Norwegian Railway Club ISBN 82 90286 28 7 References edit Bjerke amp Holom 108 a b Bjerke amp Holom 41 Bjerke amp Holom 43 a b c d Bjerke amp Stenersen 148 a b Bjerke amp Stenersen 147 Liste over fredete vernede og verneverdige baner miljoer og objekter i jernbanen PDF in Norwegian Norwegian National Rail Administration 1 April 2015 Archived from the original PDF on 3 January 2016 Retrieved 3 January 2016 Portals nbsp Trains nbsp Norway Retrieved from https en wikipedia org w index php title Droyli Tunnel amp oldid 821224162, wikipedia, wiki, book, books, library,
