Sandberg tunnel

Sandberg tunnel
	North portal (2016)
use	Railway tunnel
traffic connection	High-speed line from Nuremberg to Erfurt
place	Stadtilm
length	1320 m
Number of tubes	1
cross-section	92 m²
construction
Client	Deutsche Bahn
building-costs	approx. € 19 million
start of building	2000
completion	2002
business
release	2017
location
Coordinates
South portal	50 ° 44 ′ 54 ″ N , 11 ° 0 ′ 22 ″ E
North portal	50 ° 45 ′ 36 ″ N , 11 ° 0 ′ 12 ″ E

Map with all coordinates: OSM | WikiMap

The Sandberg Tunnel is a 1320 meter long railway tunnel on the new Ebensfeld – Erfurt line between the route kilometers 161.282 and 162.602.

The tube runs west of the districts of Traßdorf and Niederwillingen in the city of Stadtilm about 20 kilometers south of Erfurt through the Sandberg . The federal autobahn 71 is driven under at an overburden of 45 m. The gradient of the route slopes down towards the north.

The tunnel is part of construction section 3230 of the new line.

The tunnel went into operation together with the line in December 2017. The order volume was around 18.6 million euros.

geology

The tunnel is located in the middle red sandstone, especially with sandstones , but also claystones . The free water table is consistently below the tunnel floor.

history

planning

In 1996 the planned length of the tunnel was 1320 m.

construction

Construction work on the double-shell tunnel began in July 2000 from the north. The tunnel was excavated using shotcrete construction over a length of 1280 m . An open construction method was used over a length of 40 m. The breakthrough in the south took place in May 2001, the inner shell was made between June 2001 and May 2002. With the completion of the rescue areas, the shell construction was completed in August 2002.

The excavated cross-section was around 126 m² with a usable cross-section of 92 m². The two-layer inner shell was executed in block lengths of 12.5 m, with deviations on both portals.

The volume of tunnel water was low at around 0.45 l / s.

On April 8, 2017, a rescue exercise with around 300 rescue workers took place in the tunnel.

security concept

According to the tunnel guideline of the Federal Railway Authority , the tunnel structure u. a. via rescue stations at both portals and an emergency exit at kilometer 161.603. This leads to the outside via a 95 m long tunnel and a shaft and is equipped with a lock and storage space. Extinguishing water tanks with a volume of 100 m³ each were erected at the rescue areas .