Gubrist tunnel
| Gubrist tunnel | ||||
|---|---|---|---|---|
| use | Motorway tunnel | |||
| traffic connection | A1 / A4 | |||
| place | Gubrist | |||
| length | 3250 m | |||
| vehicles per day | 107,353 | |||
| Number of tubes | 2, 3rd under construction | |||
| cross-section | 103.87 | |||
| Largest coverage | 180 m | |||
| construction | ||||
| Client | Federal Roads Office | |||
| business | ||||
| release | June 21, 1985 | |||
| map | ||||
 Location of the Gubrist tunnel in the Zurich region's motorway network
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| location | ||||
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| Coordinates | ||||
| Weiningen | 675724 / 252150 | |||
| Regensdorf | 678793 / 253098 | |||
Map with all coordinates: The Gubrist tunnel is a motorway tunnel of the Zurich north bypass ( A1 / A4 ) in the canton of Zurich between Weiningen and Regensdorf . The maximum permitted speed is 80 km / h in the direction of Bern and 100 km / h in the direction of St. Gallen (applies to the period of construction).
Construction of the first tubes
The 3250 meter long tunnel was opened to traffic on June 21, 1985. It has two directionally separate tunnels with two lanes each, which are connected by eleven cross tunnels at a regular distance of 265 meters. The construction of the tunnel tubes in the underground construction stretches with a length of 3,000 meters each was carried out using a tunnel boring machine with an excavation diameter of 11.5 meters and an excavation cross-sectional area of 103.87 square meters. A molasse rock with a maximum overburden of 180 meters was driven through. After the Gubrist tunnel, the tunnel boring machine was used to excavate the Zürichberg tunnel of the S-Bahn Zürich and the Sachseln bypass tunnel of the A8 .
traffic
The Gubrist Tunnel is used on average by over one hundred thousand vehicles every day, with over seven thousand vehicles passing through the tunnel every hour between 3 p.m. and 6 p.m. In 2014 it was reported that up to 115,000 vehicles per day drive through the tunnel.
On average, traffic increased by 4% per year between 2007 and 2011. Particularly after the opening of the Zurich West Bypass , another sharp increase was recorded, with the number of accidents doubling.
Expansion of the 3rd tube
Due to the persistently high traffic load, a third tunnel tube will be built so that in the future there will be three lanes in one tube in the direction of Bern and two lanes in two tubes in the direction of St. Gallen , similar to the current situation in the Baregg Tunnel . At almost 16 meters, the new tube will have the largest diameter of a tunnel in Switzerland to date.
Archaeological excavations were carried out on the construction site for the tunnel near Regensdorf from 2009 to 2014. As a special feature, traces of settlement from various epochs could be proven: Neolithic , the Bronze and Iron Ages , the Roman times and the Middle Ages . In the course of the excavations, foundations of Roman buildings, grave monuments and paths have already been excavated. Bronze Age settlement traces and cremation graves were also discovered. Smaller finds from all eras include coins, ceramic fragments and forged metal parts.
In order to repair the settlement in Weiningen ZH that was cut up by the construction of the motorway , the tunnel is to be extended by a hundred meters in the direction of the Limmattaler Kreuz as part of the expansion with a motorway covering .
The completion of the expansion of the northern bypass to six lanes is expected to take place in 2025. The new tube should be opened to traffic three years earlier. After that, the two old tubes will be renovated alternately.
Web links
- Opening of the Zurich north bypass: Gubrist tunnel , issue 23/85 of the Swiss construction newspaper
- Gubrist tunnel on A1 north bypass Zurich
Individual evidence
- ↑ a b 2011 annual evaluation of the measuring point No. 287 Weiningen, Gubrist (Autobahn) . (PDF) (No longer available online.) Federal Roads Office , April 7, 2012, archived from the original on March 11, 2016 ; Retrieved December 23, 2012 .
- ↑ Press release on nordum Fahrt.ch dated April 29, 2015
- ↑ Prader. (PDF; 1.7 MB) In: Obwalden A8 Info No. 4. Obwaldner Wochenblatt, 1994, p. 3 , accessed on December 24, 2012 .
- ↑ Simon Eppenberger: With the western bypass, accidents on the Gubrist have doubled. Tages-Anzeiger , February 17, 2010, accessed December 24, 2012 .
- ↑ Gubrist boss on the mega-traffic jam: The soy mess was so greasy. In: Blick.ch. October 20, 2014, accessed October 20, 2014 .
- ↑ Federal Roads Office FEDRO, A1 north bypass Zurich - The project in detail ( Memento from April 24, 2011 in the Internet Archive )
- ↑ a b Adi Kälin: Great upheaval on the Gubrist . In: Neue Zürcher Zeitung . No. 198 , August 28, 2017, p. 13 .
- ↑ Sandra Zrinski: Under Regensdorfer Acker, a 4000 year old settlement is assumed. In: Tages-Anzeiger . August 19, 2009, accessed April 20, 2013 .
- ↑ Building Directorate Canton Zurich, Department of Archeology and Monument Preservation (Ed.): Activity report Archeology and Monument Preservation 2012 . March 2013 ( report online [PDF; 2.4 MB ; accessed on April 20, 2013]).
- ↑ Archaeological excavations on the Gubrist. In: A1 north bypass Zurich. Federal Roads Office FEDRO, accessed on August 28, 2017 .
- ↑ Gubrist tunnel is being extended near Weiningen. Südostschweiz Medien , December 22, 2012, accessed on December 24, 2012 .