Precisely laying up to 1,000 metres of underground cable without having to dig a continuous trench: that is the aim of the innovative E-Power Pipe® tunnel boring technique which Amprion has developed together with boring specialists Herrenknecht and RWTH Aachen University, funded by the Federal Ministry for Economic Affairs and Energy.

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Successful pilot project:

in spring 2017 Amprion and Herrenknecht tested the new technique under real conditions for the first time in the town of Borken in North Rhine-Westphalia. Three parallel, 300-metre-long borings with a depth of 2.5 metres were made. Under the local conditions, best performances of up to 126 metres of tunnelling per day on the pilot boring demonstrated the effectiveness of this tunnelling technique. “Using E-Power Pipe® we hope to gain benefits during the execution of future cable-laying projects, for example when we have to tunnel beneath roads, railway lines or areas with delicate surfaces”, notes Dr Jan Bruggmann, head of Amprion’s Cable Technology and Construction Department. However, further tests will be needed. Only after gathering sufficient experience will Amprion add this new technique to its tool kit.

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