Eppenberg Tunnel: Soft Ground Drive and Inner Lining

On the Berne-Olten-Zurich railway line in Switzerland, the stretch between Gretzenbach and Wöschnau, which is the sole remaining twin-track section, forms a bottleneck. This situation is to be rectified by late 2020 by widening the line between Olten and Aarau to provide four tracks. This upgrade will increase the route’s availability and capacity as well as it will attain more flexibility. We reported on the 3.1 km long Eppenberg Tunnel in issue 8/2017 of tunnel. This article thus merely provides a brief summary of the overall project and concentrates on the findings obtained from the construction sections already completed as well as the current status.

The railway line between Olten and Aarau is located on the main route between the cities of Berne and Zurich. On account of high demand for both passenger and goods traffic, the SBB is upgrading this link. The route is being widened from two to four tracks in order to increase capacity. As the existing route cannot be upgraded within the communities located along it owing to a lack of space, a twin-track rail tunnel is required through the Eppenberg. Once the contract was awarded, construction work started in 2014. Apart from the main tunnel, which is connected to the surface infrastructure by...

Related articles:

Issue 06/2016 Switzerland

TBM Assembly at Eppenberg Tunnel: Driving starts in early 2017

The Olten–Aarau route is one of the busiest Swiss rail arteries; between Däniken and Wöschnau it narrows from four tracks to two. This bottleneck is to be eliminated by 2020 so that train services...

more
Issue 01/2015 Switzerland

SBB awards Contract to build the Eppenberg Tunnel

The SBB (Swiss Federal Railways) awarded the main contract section for the four-track upgrading of the Olten–Aarau route in November 2014. The contract worth some 274 million Swiss francs was awarded...

more
Issue 04/2015 Germany

New Wendlingen–Ulm Rail Route: Imberg Tunnel Breakthrough

The DB Projekt Stuttgart-Ulm GmbH broke through the almost 220 m long mined section of the Imberg Tunnel on the new Wendlingen–Ulm rail route on June 30, 2015 following a three-month construction...

more
Issue 02/2018 Switzerland

Eppenberg Tunnel: Successful Breakthrough early February 2018

An important milestone for the continuous four-track east/west axis in Switzerland has been accomplished: The tunnel boring machine has finished the 2600 m long tunnel through the Eppenberg in its...

more
Issue 06/2017 Austria

Koralm Railway: Final Drive

The start of excavation for the Koralm Railway’s Untersammelsdorf Tunnel in Carinthia, Austria, took place on July 7, 2017. According to Klaus Berger, ÖBB’s project manager, the last of six tunnels...

more