District heating Aarhus Southern Harbour

Client: Aarhus Kommune, AVA
Type of Contract: Main contract
Contract sum: 22 mio. DKK
Construction period: 2019
Engineer: Niras A/S

Info

Overview

Establishment of district heating pipes in an urban environment

The contract included expansion of the existing district heating transmission network from Aarhusværket to connect the Højbjerg pipeline in a path parallel to Sydhavnsgade, including buildings. The work concerned the establishment of transmission and distribution lines in Aarhus Sydhavn. This included dismantling, TV inspections and the establishment of coatings, excavation work for district heating pipes and rerouting of supply pipes. The district heating pipes were in the dimensions DN125 to DN600.

Contaminated soil and soft bottom were handled in the contract and traffic settlement was carried out, as well as groundwater lowering.

The four district heating pipes were led through a 50 meter long sheet pile 4.5 meters below ground, as the district heating pipes had to be led under several transverse sewer lines. When the district heating pipes were installed, the sewer line was temporarily hung up. Likewise, a 20 ton Ø1200 concrete pipe had to be handled. When handling a Ø600 common line, a larger overpumping system was established.

As part of the project, drilling was carried out through concrete in connection with the connection to the Aarhus power plant.

Key figures

● 1,350 tons of decomposition work
● 12,000 m³ earthworks
● 6,500 tons of contaminated soil
● 327 lbm sheet pile wall
● 1,270 lbm district heating lines

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