400:, the maximum tonnage of trains on the route is around 1,600 tonnes. However, during the 2010s, the original tunnel's loading gauge was deemed to be insufficient and that work would be necessary in order to realise ambitions for this corridor to provide a headroom of 4 metres (13 ft) throughout its length, allowing for the haulage of taller freight trains, resulting in a reduction in the numbers of lorries traversing the road network. Addressing the non-compliant Bözberg Tunnel has been referred to as the most major undertaking of the initiative; a further 20 tunnels also required enlargement work for the initiative, along with numerous platforms, overpasses, signalling systems, and electrical infrastructure.
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641:, where it was subsequently used in restoration work at the Oberegg limestone quarry. Considerable care was paid in minimising the risks involved in working close to the original tunnel, which remained active throughout the boring process; accordingly, a series of continuous monitoring systems were active onsite at all times, along with emergency evacuation preparations. For extra protection during the last 60 meters of the TBM's boring, a temporary protection wall was deployed in the original tunnel.
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gained favour instead. The new Bözberg Tunnel shall replace the old one. Following the completion of the new tunnel, the original bore shall be retained but be modified for access use to the new bore, which is intended for both service and rescue purposes in a safe manner. The modification work, which is planned to be completed during 2022, shall involve the construction of five cross-shafts for access between the new and old tunnels.
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required full waterproofing measures; the inner lining was heavily reinforced to withstand swelling by the surrounding ground in addition to water pressure. On 29 November 2017, the TBM achieved breakthrough in the new bore. During
November 2019, work begun on laying the track, which is supported by slab-type
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During March 2016, construction commenced on the new Bözberg Tunnel, which runs roughly parallel to its predecessor. It is a considerably wider and longer tunnel, being able to accommodate trains up to a height of 4 metres (13 ft). The reason for its construction is to better accommodate larger
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Studies were conducted into proposed remedial work to expand the loading gauge, which found that such efforts would involve a six-year timeframe that would heavily impact existing traffic operations throughout; an alternative approach of constructing a larger second tunnel alongside the original
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Progress within the tunnel was relatively steady, despite varying geology along its path; the rate of advance was sometimes as high as 40 meters per day, achieve by crews working in two shifts of eight hours each per workday. The lining of the tunnel differs along its length, as only some areas
328:. The original tunnel was opened during 1875; it is set to be closed to rail traffic during 2020-2021 following the commissioning of its replacement, after which it shall be converted and retained for service and rescue purposes in respect to its successor.
637:(TBM); use of the TBM commenced during May 2017 following seven months of conventional excavation work. The excavated spoil was removed from the tunnel by rail, using three trains per day to transfer a daily average rate of 1,800 tonnes of material to
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649:. On 6 February 2020, the final sleeper was laid, marking a major milestone in the tunnel's fitting-out process. Railway operations using the new tunnel are anticipated to begin during October 2020.
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350m. The new tunnel's northern portal is located at
Effingen and the southern portal at Schinznach-Dorf. During July 2015, a contract was awarded to
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On 9 March 2016, construction of the new Bözberg Tunnel commenced. The majority of the excavation was conducted from the southern portal using a
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The Swiss
Federal Office of Transport permitted the construction of a new Bözberg railway tunnel, to parallel the existing one, at a cost of
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to perform the construction of the new tunnel itself as well as any associated works. Preparatory work begun during
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924:"The new Bözberg Tunnel (Switzerland) – risk management and auxiliary measures for the TBM break-through"
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Parts of this article (those related to old tunnel was replaced by new one in
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and heavier freight trains. The second Bözberg Rail Tunnel is scheduled to be opened during 2020.
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The tunnel has become a key structure on the
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Please help update this article to reflect recent events or newly available information.
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817:"Construction begins on Switzerland's new Bözberg railway tunnel"
385:. The alignment of the tunnel runs roughly parallel to the later
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Geological longitudinal section of the Bözberg Rail Tunnel
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16:Railway tunnel in the Swiss canton of Aargau
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941:"Slab track in the Bözberg Tunnel stands"
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956:"Final sleeper laid in Bözberg tunnel"
922:M. Ramoni; R. Gallus; R. Iten (2019).
340:The tunnel forms a key element of the
838:. tunnelingonline.com. 11 March 2016.
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892:from the original on 15 October 2015
861:from the original on 15 October 2015
726:from the original on 15 October 2015
719:Historical Dictionary of Switzerland
857:. Simmons-Boardman Publishing Inc.
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954:Green, Anitra (5 February 2020).
851:"SBB to start work on new tunnel"
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849:Green, Anitra (9 October 2015).
799:. tunnel-online.info. June 2015.
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815:Foley, Amanda (10 March 2016).
780:. railfreight.com. 31 May 2018.
1016:Railway tunnels in Switzerland
888:. Russell Publishing Limited.
880:Sadler, Katie (17 July 2015).
722:(in French). 14 October 2004.
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855:International Railway Journal
571:2,693 metres (8,835 ft)
179:2,526 metres (1.570 mi)
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670:(Map). Swiss Confederation
1021:Tunnels completed in 1875
943:. Rhomberg. 6 March 2020.
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819:. tunnellingjournal.com.
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413:New Bözberg Rail Tunnel
20:Old Bözberg Rail Tunnel
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558:Passenger and freight
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990:Bözberg Tunnel (new)
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978:Bözberg Tunnel (old)
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31:South portal in 1875
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391:A3 motorway
336:1875 tunnel
230:Electrified
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75:Coordinates
68:Switzerland
1005:Categories
896:14 October
865:14 October
730:14 October
674:14 October
653:References
511:Work begun
470:47°27′54″N
316:under the
85:47°27′55″N
563:Technical
555:Character
506:Operation
473:8°06′59″E
398:SBB Cargo
171:Technical
163:Character
113:Operation
890:Archived
859:Archived
724:Archived
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628:Implenia
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445:Location
430:Overview
368: in
322:Effingen
320:between
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60:Location
37:Overview
639:Wildegg
609:⁄
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389:on the
377:16 2/3
363:⁄
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155:Traffic
88:8°7′1″E
54:Bözberg
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519:Opened
501:Active
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299:tunnel
189:tracks
176:Length
126:Closed
118:Opened
64:Aargau
927:(PDF)
527:Owner
303:Swiss
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134:Owner
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759:2020
732:2015
694:ISBN
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550:Rail
514:2016
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324:and
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238:15 k
158:Rail
121:1875
50:Line
624:SFr
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185:No.
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379:Hz
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