Heitersberg tunnel

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West portal near Mellingen

The Heitersberg tunnel is a railway tunnel of the Swiss Federal Railways in the canton of Aargau and part of the Heitersberg line . The tunnel has a length of around 4.9 km (4930 m and 4888 m).

The tunnel was designed by Basler and Hofmann from 1966 and built from April 1, 1969. The construction work was divided into two construction lots, an east construction lot with an open cut section of 600 m and a section with a length of 2600 m, driven by a tunnel boring machine . A shield drive was used for the second eastern construction lot with a length of 1700 m .

The tunnel is designed to have two lanes at 4679 meters, but is divided into a right and left branch on the east side. This is due to the fact that the branch leading in the direction of Zurich is led over the existing Zurich – Baden route immediately after the end of the tunnel , while there is no crossing in the direction of Olten . After the two single-lane tubes meet in the tunnel, a lane change is installed.

The tunnel between Killwangen and Mellingen cost 90 million francs unadjusted. The breakthrough was on October 13, 1972.

Geologically, the 2600 m long section in the Molasse was particularly challenging. Therefore, a Robbins tunnel boring machine with chisel rollers was used in the section . The diameter of the drill was 10.67 m, and at this point it was only the fourth project with a drill diameter larger than 10 m. Subsequently, floor segments were used directly so that no morass would develop in the tunnel floor . In addition, the machine was supported on running gears with rails on the base in order to divert reaction moments from the drill head. A ring closure was then created with shotcrete , which has a thickness of 5 to 20 cm, on average 11.2 cm. In addition, the tunnel ceiling was secured with rock anchors or wire nets . Steel arches were also installed in around a quarter of the section.

Operational

Driving in the Heitersberg tunnel with steam locomotives is prohibited according to FDV AB 16.1 section 3.3. In previous versions - for example the one from 2013 - the use of the parallel line via Wettingen / Brugg was mandatory in place of a ban (see Zofingen – Wettingen and Baden – Aarau railway ).

Individual evidence

  1. ^ Hans G. Wägli: Schienennetz Schweiz , 2010 edition, ISBN 978-3-909111-74-9 , page 151.
  2. ^ Ernst Hofmann: The Heitersberg tunnel of the SBB . In: Schweizerische Bauzeitung . tape 3 , 1970, doi : 10.5169 / seals-84390 .
  3. ↑ 90 million for 4.9 km. (PDF) The Heitersberg line in the SBB construction and operational planning. In: Among us. September 20, 1974. Retrieved October 30, 2017 .
  4. ↑ Duri Prader: Heitersberg Tunnel of the Swiss Federal Railways heading with a diameter of 10.67 m Description and basic considerations . In: New Findings in Cavity Construction - Foundations in Rock / Latest Findings in the Construction of Underground Excavations - Rock Foundations . Springer Verlag, Vienna 1976, ISBN 3-7091-8452-5 , p. 115 ff ., doi : 10.1007 / 978-3-7091-8452-3_7 .
  5. ↑ AB FDV Infrastruktur, rule version 14-0, valid from July 1, 2017
  6. ↑ sbb.ch ( Memento of November 7, 2017 in the Internet Archive ) PDF, AB FDV Infrastructure, rule version 6-0, valid from July 1, 2013 page 281

Coordinates: 47 ° 26 '6.6 "  N , 8 ° 19' 6.3"  E ; CH1903:  six hundred sixty-six thousand three hundred and seventy  /  two hundred fifty-four thousand one hundred ninety-two