Pipe heading DN 1600 by micro-tunnelling with reinforced concrete driving pipes for passing under the nature reserve Löcknitztal near Kienbaum (Land Brandenburg) as protective pipe for a high-pressure gas pipeline DN 1100.
Ruhrgas AG/Verbundnetz Gas AG
Gildemeister Tief-, Stahlbeton- und
Rohrleitungsbau GmbH&Co. KG Berlin
Pumping off the supporting liquid (bentonite suspension) used in the tunnel during pipe heading.
Application of a submersible pump Type KTZ35.5 connected with an accompanying pipe line DN 100 for continuous removal of the supporting liquid during the whole time of pipe heading.
The pump was always positioned at the lowest point of the syphon and operated on snore mode.