Mühlbach tunnel
| Mühlbach tunnel | ||||
|---|---|---|---|---|
| traffic connection | High-speed line from Hanover to Würzburg | |||
| place | Neuenstein | |||
| length | 1697 m | |||
| Number of tubes | 1 | |||
| construction | ||||
| Client | German Federal Railroad | |||
| start of building | 1985 | |||
| completion | 1988 | |||
| business | ||||
| operator | DB network | |||
| location | ||||
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| Coordinates | ||||
| North portal | 50 ° 55 ′ 54 " N , 9 ° 34 ′ 34" E | |||
| South portal | 50 ° 55 ′ 1 ″ N , 9 ° 34 ′ 52 ″ E | |||
Map with all coordinates: The Mühlbach tunnel is a 1,697 m long railway tunnel on the high-speed line Hanover – Würzburg , between Fulda and Kassel . It is located in the Hessian community of Neuenstein .
course
In the area of the north portal , the route is initially in a transition curve that turns south into a left curve of 7,000 m radius . After a 427 m long straight, there is another transition arch, which ends in a right-hand bend of 10,000 m radius, in which the south portal is also located. The gradient falls continuously towards the south portal with 12.5 per mille.
At the north portal (construction km 174.919) the upper edge of the rail is at a height of 346.75 m above sea level. NN , at the south portal (construction km 176.616) of 325.539 m. The overburden ( mountain ridge ) is up to 88 m. To the south of the tunnel, after a short section of open lines, the Schmitteberg tunnel follows, followed by the Geisbach valley bridge .
geology
The tunnel only penetrates rocks from the Gelnhausen range of the Lower Buntsandstein .
history
planning
The structure was planned at the beginning of 1984 with a length of 1583 m. The costs were calculated at 48.4 million DM. Construction should take place between September 1984 and September 1988.
In the planning and construction phase, the tunnel was in planning section 14 of the middle section of the new line.
construction
The tunnel was as lot 2 as one of seven lots of the Hainrode-Süd construction project , which covered the construction kilometers 171.670 to 177.006. The southern section of the Hainrode tunnel and the 291 m long Schmitteberg tunnel were among the other sections of this construction project . The section was established in July 1984 announced and on 29 October 1984 for a contract sum of 108,353,000 DM (net, without VAT , around 55.4 million Euro; price as of 1984) awarded.
Construction began on February 1, 1985, and excavation began on March 1 of the same year. The dome was broken through on February 16, 1986 , the stope on March 1, 1986. The construction work was completed on December 20, 1988. The tunnel sponsorship had Inge Banna taken.
The 1,697 m long tube (the distance between the two portal base points was measured) was erected over a length of 1,526 m using the new Austrian tunneling method . 171 m was built using the open construction method. The tunnel was driven from the south portal and an intermediate attack in a northerly direction.
As a result of geological problems and the sometimes low overburden, the tube was lengthened 118 m to the south compared to the original plan. (The originally planned slope stabilization of up to 18 m in height turned out to be insufficient). Ultimately, a 14.8 m long section at the north portal (km 174,919.9 to 174,934.7) was followed by a mining drive over a length of 1,262.2 m. A 55.0 m long section in cut-and-cover at the intermediate attack (up to km 176,251.9) is followed by a further mining drive of 161.1 m in length. A lid construction method was used on a further 108.4 m . The remaining 95.5 m, including the south portal, were built using the cut-and-cover method.
The excavated cross-section was up to 146 m², the usable cross-section between 81 and 96 m². The maximum excavation height (base - apex) was 11.60 m. A total of 206,572 m³ of rock was excavated, and 102,156 m³ of material was removed for the pre-cuts. The excess masses, together with the masses of the Hainrode-Süd and Schmitteberg tunnels, were deposited at the Urbachtal landfill. During the construction phase, up to 5 liters of tunnel water were produced every second.
For the extrados 36,470 m³ were sprayed concrete used for the inner and base invert were 36,470 m³ concrete . A total of 3,470 t of steel was used for the reinforcement .
The ARGE Hainrode-Tunnel-Süd was commissioned with the construction , which - with varying composition - built a total of nine tunnels with a total length of 9,864 m in the central and southern sections of the new line between 1982 and 1989.
source
- Working group "Tunnel Hainrode-Süd, Mühlbach and Schmitteberg": tunnel construction. Driving, expansion, equipment and costs . Frohnweiler Druck-Gesellschaft, Innsbruck, 1989, pp. 3-8, 24-26, 43.
Individual evidence
- ^ Walter Engels: The middle section of the new Hanover – Würzburg line . In: The Federal Railroad . tape 60 , no. 5 , 1984, ISSN 0007-5876 , pp. 401-410 .
- ↑ Bundesbahndirektion Frankfurt (M), project group NBS Frankfurt am Main of the Bahnbauzentrale (publisher): New lines Hanover-Würzburg from Kassel to Fulda, Cologne - Rhine / Main in the directorate area . 12-page leporello (10x21 cm), Frankfurt am Main, no year (approx. 1984).