Inn Canal Jettenbach / Bavaria

Work on steep embankments:

Renovation of the Inn Canal – Jettenbach / Töging

The Inn Canal at Jettenbach-Töging forms the headrace channel of the Töging power station. Its total length from the Jettenbach intake channel to the power station is approximately 20 km.

The poor structural condition of the embankments was the reason for renovating the structure.

Job Report – Factsheet

Project: Inn Canal renovation
Contractor: EON Wasserkraft GmbH
Client: ARGE renovation Inn Canal
Type of operation: Repair of fire damage in the undersea tunnel
Special feature: Substrate preparation on steep embankments
Equipment technology: Special construction
Unit: 450 kW units

The job

570,000 m² of embankment had to be prepared within 6 weeks for the subsequent works. The embankments have a consistent gradient of 40°.

The start of the canal is 8 m high, and this gradually increased to 12 m at the end. This creates embankments of between 12 and almost 20 m that must be bridged.

Custom design

Due to the narrow time constraints, the Wannenwetsch design team developed a multi-nozzle blasting jet, which, in combination with high-performance telescopic caterpillars, meant the large and steep embankments could be completed within the desired framework conditions.

The construction site traffic in the invert area, the high level of residual water and the very steep entrance and exit ramps made the project particularly challenging.

Substrate preparation

Owing to comprehensive trials and preliminary works, as well as the dedication of our employees, the project progressed swiftly and reliably. Once the damaged concrete had been removed using modern high-pressure water technology, the subsections were repaired with shotcrete and then provided with a new, all-over concrete panel.

Result

Using special robots powered up to 450 kW by pump units, Wannenwetsch was able to complete the preparatory works before the interim and final deadlines, even despite difficult conditions.

Working under the highest quality criteria

Renovation of the P6 multi-storey car park – Zurich Airport

With more than 26 million passengers every year, Zurich is the number 1 airport in Switzerland. The airport is also an international player in terms of quality. Therefore, the chloride-damaged surfaces of the P6 multi-storey car park were overhauled to the highest standards, including the consistent use of certified particulate filters.

Work on a European transport hub

Renovation of Felperbrücke - A13 Brenner motorway

The renovation works on the high-traffic Felperbrücke on the Brenner motorway were completed in three construction phases – with two-way traffic throughout – and posed great challenges to man and machine due to the tight interim and final deadlines.

Renovation of the water-side dam wall

Maintenance of Pöhl Reservoir / Saxony

The structure required restoration due to the severely damaged concrete surface of the water-side dam wall. The remedial works for the dam wall were scheduled in two stages. Firstly, large areas of damage, weathered old concrete were removed by high-pressure water blasting. Secondly, a 20 cm-thick shotcrete facing formwork was constructed.

Work on the North Sea bed

Renovation of the Limfjord Tunnel, Denmark

The Limfjord tunnel is a key link to the Aalborg region. Water penetrated the twin-tube undersea motorway tunnel due to leaky construction joints. The purpose of the renovation was to stop the water penetration and to reconstruct the damaged concrete.

Learn more now!

Would you like advice or information, or do you have a query for Wannenwetsch? We look forward to hearing from you.