Tunnel Strengthening against the Effects of Excavating

The objective of the AKE Abwasserkanal Emscher infrastructure project is to transfer sewage by underground means in the future in appropriately dimensioned conduits through the German Ruhr District to the clarification plants, and to revitalize the river Emscher. The pipeline networks in the neighbouring towns and cities have to be adapted to link up with the roughly 50 km long main interceptor. In Gelsenkirchen, tunnels belonging to the urban transit system are also affected by the sewage construction. The tunnels were planned and built during the 1970s, taking expected influences resulting from mining into consideration. These influences led to special designs for the tunnels, which represent particular general conditions for their strengthening.


The transformation of the Ruhr District from a coal and steel location to a modern region for science, industry and services is accompanied by the new development of old industrial centres and the recultivation of large areas of the changing region. In this way, its attractiveness and competitiveness vis-à-vis other regions is to be enhanced so that structural change can successfully forge ahead.

The AKE Abwasserkanal Emscher (Emscher Sewage Canal) has been an essential infrastructural project in this overall context in recent years [1]. The aim of this project is to transfer...

Related articles:

Issue 2012-02 Germany

Biggest individual Project started for Emscher Redevelopment Scheme

It is the biggest individual project within the scope of the “Emscher Redevelopment” – a generation-spanning scheme providing the prerequisite for modernising the region’s hydro-economic...


Safety – from Tunnel Mouth to Breakthrough

Interview with Hans-Jürgen Witt, CEO of S-I-T Tunnelsicherheit GmbH

Issue 2017-06 Germany

Final Double Breakthrough at the Emscher Sewer

With the breakthrough of the last two tunnel boring machines into the target pit of construction section 40 on June 12, 2017 the tunnel and pipe jacking work for the Emscher sewer has been completed....

Issue 2012-07 Antwerp/Belgium

Brine Freezing for Cross-Passages in the Liefkenshoek Tunnel

The Liefkenshoek rail tunnel is being constructed in Antwerp. Ground freezing for 15 cross-passages represents part of the scheme. The altogether 16.5 km long rail tunnel will form a new north-south...

Issue 2014-05 Switzerland

Küblis Bypass: Tunnel Roughwork completed

The 3350 m long Küblis Bypass between Dalvazza and Prada in the Canton of Graubünden is intended to relieve the municipality of through traffic on the A28 national highway. The 2255 m long tunnel is...