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to consist of 26 crossover passages between the two tunnels, along with an emergency station; a pair of 400 metre-deep ventilation shafts are also to be dug. By 7 June 2016, work on the third section of the SBT had commenced; this meant that full-rate construction activity upon the project, which was reportedly costed at €3.3 billion as of this point in time, was now underway.
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Additional major works will include the construction of entrances in
Gloggnitz and MĂĽrzzuschlag, as well as ventilation shafts at Trattenbach and Sommerau. Substations located at Gloggnitz and Langenwang are intended to be used to supply electricity to the trains that will run through the SBT. Beyond
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To facilitate the construction work, three intermediate sites were established near to Göstritz, Fröschnitzgraben and
Grautschenhof. At Göstritz, a 1,000 metre access gallery and multiple 250 metre-deep shafts were constructed to facilitate conventional tunnel excavation methods. At Fröschnitzgraben,
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at a significantly lower altitude. During 2006, a two-year route selection process was conducted; in April 2008, it was announced that the southernmost route had been determined to be the optimum of those studied. During the later half of 2009, the final route for the proposed SBT was selected; this
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During 2012, preparatory ground works for the SBT commenced. On 7 January 2014, construction began upon the tunnel's central section. Work on this section involved boring work along a length of 8.6 km, while a drill-and-blast method for the remaining 4.3 km section. The central section is
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Owing to encountering difficulties with the complex geology in the area, including the fault zone being traversed during construction and different rock types, an additional cost of €390 million was added taking the total cost to €3.9 billion, with measures to mitigate these risks in 2021 being
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Specifically, the tunnel comprises twin-parallel bores, each possessing a diameter of 10 meters and separated by up to 70 meters; for safety reasons, connecting pedestrian passages between the two bores are to occur at regular intervals of up to 500 meters. Being significantly faster than the
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Construction began on 25 April 2012 and the link is expected to enter operational service in 2030, delayed from the original estimate of 2026. The main benefit of the new tunnel will be increased ease of use for freight traffic. The gradients of the traditional routes requires the use of two
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will enable Graz-Klagenfurt journeys of approximately 45 minutes, as such it will bring Vienna-Klagenfurt journeys down to around 3 hours 25 minutes starting end of 2025. The SBT is projected to enable time savings of additional 45 minutes, which will enable journeys from Vienna to Graz and
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for it to conduct tunnel excavation works, while
Strabag was engaged to conduct drilling activities. During 2010, BGG Consult was awarded a contract to provide geotechnical and hydrogeological consulting services during both the tendering and construction phases of the programme.
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The primary contracts for the construction of the SBT is divided into three contract sections. During 2014, the contract for the construction of the 13 km-long central section of the tunnel, valued at approximately €623 million ($ 827 million), was awarded to a consortium of
215:. The existing route is 41 km long and the Semmering Base Tunnel will be 27.3 km long. The new route will offer time savings of up to 30 minutes, partly on account of the shorter route and partly on account of the higher speed limit (maximum 250 km/h).
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The SBT has a gradient of 0.85 per cent. This gradient was selected to enable it to be used by heavy freight trains with only a single locomotive. The plan involves several infrastructure changes, such as the integration of the railway stations at
276:. By the turn of the 21st century, a total of 70,000 goods and passenger trains were reportedly being run through the Semmering railway during each year, it is one of the busiest routes in
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In order to relieve pressure upon the original route, interest grew in the development of a more direct route over the Alps. These notions soon centered around the concept of boring a
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268:, and has been commonly referred to as the world's first true mountain railway. The historic significance of this traditional route is such that it has been declared a
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the tunnel itself, ancillary work involves the construction of two new railway bridges, as well as a new road bridge and an underpass for the B27.
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locomotives; the reduced gradient of the new link will enable the transit of freight traffic using just one locomotive. The SBT and the
405:. Once assembled, these will be used to create the bore towards Gloggnitz. Breakthrough of this section occurred on 10 June 2022.
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529:"New Semmering Base Tunnel – the current state of tunnel design taking the newest investigation results into account."
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a pair of 400 metre-deep shafts, possessing a diameter of 22 metres, were dug ahead of the deployment of
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of Werner
Consult and Witrisal consortium to conduct the route planning for the tunnel. Separately,
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in combination will enable freight transit across the whole southern line with just one locomotive.
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Daller Dipl.-Ing, Josef & Vigl Dipl.-Ing. Dr.techn, Alois & K. Wagner Dipl.-Ing, Oliver.
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systems. Soil mechanical and geotechnical consulting services at the intermediate sites at
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was also involved in the design for the new twin-tube tunnels; this work included its
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Semmering line, it would enable a reduction in the travel time between the cities of
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services are 2 hours 35 minutes and 3 hours 55 minutes, respectively. The
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Klagenfurt of 1 hour 50 minutes and 2 hours 40 minutes, respectively.
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scheme is required to mitigate against the risk posed by the nearby
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Semmering-Basistunnel in der
Steiermark fertig gegraben (in German)
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679:"Semmering base tunnel – major contract for the Marti groupe."
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with the proposed route. Outside of railway infrastructure, a
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ran between
Gloggnitz and the MĂĽrzzuschlag-Langenwang area.
513:"The Semmering Base Tunnel: powerful and future-oriented."
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contracted the planning of the proposed SBT's route to a
694:"Milestone for the Semmering base tunnel (SBT) lot 2.1."
709:"Durchschlag beim Semmering-Basistunnel" (in German)
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604:"Construction starts on Semmering Base Tunnel."
199:is a railway tunnel under construction between
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484:8 September 2023, Retrieved 12 September 2023.
619:"Semmering base tunnel (lots 1.1. and 2.1.)."
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457:"Further delay to Semmering Base Tunnel"
649:"Work starts on Semmering base tunnel."
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348:. A separate contract was awarded to
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16:Railway tunnel in southern Austria
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664:Briginshaw, David (7 June 2016).
437:"Semmering Base Tunnel Factsheet"
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666:"Semmering Base Tunnel update"
331:road would also be necessary.
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461:International Railway Journal
320:while the relocation of the
189:230 km/h (145 mph)
147:27.3 km (17.0 mi)
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768:Railway tunnels in Austria
37:Northern tunnel portal at
654:, Retrieved: 29 May 2018.
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570:, Retrieved: 28 May 2018.
358:Austrian Federal Railways
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639:, Retrieved 29 May 2018.
634:"Semmering Base Tunnel."
565:"Semmering Base Tunnel."
388:by INSITU Geotechnics.
226:Currently, the fastest
778:2027 in rail transport
568:railway-technology.com
403:tunnel boring machines
22:Semmering Base Tunnel
516:Global Railway Review
374:environmental control
197:Semmering Base Tunnel
25:Semmering-Basistunnel
739:47.6758°N 15.9224°E
735: /
270:World Heritage Site
652:Allan J Hargreaves
609:, 14 January 2016.
602:Reidinger, Erwin.
588:, 7 February 2013.
350:Amberg Engineering
56:under construction
697:tunnelbuilder.com
511:Gobiet, Gerhard.
262:Semmering railway
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378:ventilation
335:Contractors
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285:base tunnel
234:and Vienna-
153:Track gauge
144:Line length
757:Categories
730:15°55′21″E
727:47°40′33″N
467:2022-04-27
418:References
362:consortium
346:Swietelsky
256:Background
244:Koralmbahn
236:Klagenfurt
500:The Local
366:Gruner AG
306:Gloggnitz
201:Gloggnitz
139:Technical
88:Gloggnitz
39:Gloggnitz
622:Implenia
342:Implenia
176: in
47:Overview
534:, 2010.
278:Austria
251:History
240:Railjet
209:Austria
171:⁄
116:Service
110:English
102:Website
81:Termini
66:Austria
294:Vienna
274:UNESCO
228:Vienna
106:German
74:Styria
62:Locale
52:Status
41:(2019)
440:(PDF)
329:]
384:and
372:and
356:The
344:and
308:and
298:Graz
296:and
266:Alps
260:The
232:Graz
203:and
195:The
121:Type
712:ORF
322:B27
272:by
207:in
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Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
