Milchbuck tunnel
| Milchbuck tunnel | ||||
|---|---|---|---|---|
 South portal
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| use | Road tunnel | |||
| place | Zurich | |||
| length | 1820 m | |||
| Number of tubes | 1 | |||
| Largest coverage | 35 m | |||
| construction | ||||
| start of building | 1975 | |||
| business | ||||
| release | 2nd July 1985 | |||
| location | ||||
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| Coordinates | ||||
| North portal | 683721 / 250458 | |||
| South portal | 682929 / 248852 | |||
Map with all coordinates: The Milchbuck tunnel is a 1,820 meter long road tunnel in Zurich and part of the A1L feeder road to the A1 motorway .
The structure, which was opened to traffic in 1985, is located between the Zurich- Letten and Zurich- Unterstrass connections and consists of a tunnel with one lane towards the city center and two lanes out of town. The Schöneichtunnel follows in the north direction .
Like the Sihlhochstrasse, it is part of the controversial Zürcher Expressstrassen-Y , which was first proposed in two expert reports in 1955 to link the A1 and A3 in the middle of the city of Zurich in Letten, but was not completed.
traffic
The tunnel was originally supposed to be built with two tubes, but this was rejected by a referendum in the city of Zurich, so that only the eastern tube was built. It ends on Wasserwerkstrasse in downtown Zurich near the Upper Letten. There it was supposed to link the three national roads over the Limmat in the area of the bathing establishment with a traffic triangle. Another plan was to run it underground to connect the A1 with the A3 in the Sihl valley.
Around 50,000 vehicles drive through the tunnel every day.
In the direction of the city center there is an entrance to the underground parking garage Irchel at the north portal between the lanes .
construction
The Milchbuck tunnel has an average gradient of 2.7% from north to south and connects the Glatt - with the Limmattal . It crosses under the Milchbuck ridge, a completely built-up area of the city of Zurich. A moraine is crossed in the south . The tunnel section was made with a pre-cut over a length of 250 meters. A full excavation with the freezing method was used for the following 330 meters , with Stampfenbachstrasse being undercut with a minimum of 6.5 meters and residential and commercial buildings in Beckenhofstrasse with 5.5 meters. The subsequent 960-meter-long stretch in the Molassefels was driven through with a roadheader in partial excavation, followed by the 280-meter-long pre-cut north. The excavated cross-section of the 1310-meter-long mined tunnel section was around 145 square meters. A total of 620,000 cubic meters of excavated material including the pre-cuttings has accumulated.
In 2003 and 2006, extensive repairs were carried out on the structure. In May 2011, work began on a 1300 meter long safety tunnel. The tunnel was completed in 2014 and cost 31 million francs. Since the construction work, only two of the three lanes are available, the middle lane is a hard shoulder.
literature
- Kurt Aerni: Overview of the Milchbuck tunnel project . In: Swiss engineer and architect , issue 23/85, pp. 552–554
Individual evidence
- ↑ Zurich West Bypass - The preliminary correction of a bad planning: Invented over 50 years ago, the street Ypsilon has shaped traffic policy in Zurich to this day [1] , April 20, 2009, Neue Zürcher Zeitung