Vereina Tunnel

Coordinates: 46°47′38″N 10°00′06″E / 46.793915°N 10.00174°E / 46.793915; 10.00174
Source: Wikipedia, the free encyclopedia.
Vereina Tunnel
Overhead catenary
,
11 kV AC 16 2/3 Hz
Route map
Legend
RhB)
to Landquart
32.4 km
20.1 mi
 Klosters Platz
Landquart
RhB)
to Davos Platz
Zugwald
35.0 km
21.7 mi
 Klosters Selfranga
(car shuttle)
Vereina Tunnel
37.2 km
23.1 mi
Klosters Selfranga Süd
43.6 km
27.1 mi
Vereina Nord
45.7 km
28.4 mi
Vereina Süd
52.1 km
32.4 mi
Sagliains Nord
53.7 km
33.4 mi
Sasslatsch Nord
54.5 km
33.9 mi
 Sagliains
RhB)
to Bever│to Scuol-Tarasp
This diagram:

The Vereina Tunnel is a railway tunnel, and the principal part of the Vereina railway line, in the

Landquart–Davos Platz and the Bever–Scuol-Tarasp
lines.

First proposed during 1975, construction of the tunnel commenced during 1991 and was officially completed on 19 November 1999, ahead of schedule. In the first year alone, roughly 280,000 vehicles were recorded as having used the tunnel; since then, its usage has risen to around 450,000 vehicles per year. At 19,042 metres (62,474 ft) in length,[1] the Vereina Tunnel is the longest tunnel on the Swiss Rhaetian Railway (RhB) network as well as the world's longest metre-gauge railway tunnel.

History

As early as 1975, the administrative council of the government of the Swiss

Lower Engadin.[2] The project represented the first expansion to the RhB route network since 1914. However, it was not until 1985 that sufficient support for the initiative amongst the canton's population was garnered, allowing the project to proceed through the approval process.[2]

Following the approval of the proposal by the

Swiss Parliament, a groundbreaking ceremony was held during 1991, marking the official start of construction.[2] On the north side, a tunnel boring machine (TBM) was used; its rate of progress reportedly advanced between four and 30 meters per day, varying due to the different strengths of rock being bored through. On the south side, conventional methods were used, albeit with the application of several modern construction techniques.[3] Amongst other notable elements, the Vereina Tunnel employed one of the most extensive uses of permanent sprayed concrete anywhere in Switzerland.[4]

The construction schedule had called for the tunnel to be completed after nine years of work; however, a greater rate of progress than this conservative projection was achieved, thus construction was completed nearly six months ahead of schedule.[2] This was despite the need for unplanned remedial work, such as the reprofiling of 20 meters of the northern bore after fracturing had brought about a temporarily standstill in the work.[5] The total cost of the Vereina Tunnel reportedly came to CHF 670 million.[6]

On 19 November 1999, a ceremony was held, attended by various officials such as the then Federal Councillor and Transport Minister

commuter traffic, as well as better facilitating tourist access to and from the Engadin.[2] In the first year alone, roughly 280,000 vehicles were recorded as having used the new tunnel. By 2019, the RhB were reporting that an average of just above 480,000 vehicles were traversing the Vereina Tunnel per year.[2]

Service is based on hourly regional trains between

Electrification is the RhB overhead standard of 11 kV 16.7 Hz AC. Due to its length, the spatial effects of the Vereina Tunnel have been subject to studies.[7] Since its completion, multiple safety-related modifications to the tunnel have been performed, largely due to changes in standards that have elevated safety requirements.[8] During the 2010s, the Zurich Electricity Works established a district-heating network adjacent to the tunnel that primarily uses water drawn from area around the north portal for geothermal energy.[9]

References

Citations

  1. ^ "Key figures". Chur, Switzerland: RhB. Retrieved 16 August 2019.
  2. ^ a b c d e f g h Suter, Erika (19 November 2019). "Mountain conqueror – the Vereina Tunnel celebrates 20 years". Rhaetian Railway.[dead link]
  3. ISSN 0956-8700
    . Retrieved 18 December 2023.
  4. ^ Peila, Viggiani and Celestino 2019, p. 3208.
  5. ^ Ramoni 2020, p. 33.
  6. ^ "Vereina Tunnel: Safety Concept" (PDF). Amber Engineering. Retrieved 17 April 2020.
  7. ^ "Spatial Effects of the Vereina Tunnel". europa.eu. January 2004. Retrieved 18 December 2023.
  8. ^ "Rail tunnel Vereina". Amber Engineering. Retrieved 17 April 2020.
  9. ^ "Hot Water from the Tunnel for generating Power". June 2014. Retrieved 18 December 2023.

Bibliography

External links

46°47′38″N 10°00′06″E / 46.793915°N 10.00174°E / 46.793915; 10.00174

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