GRP Pipes in Guided Auger Boring for Storm Overflow in Styria
The project was the first in Austria to use HOBAS GRP Jacking Pipes DE 924, SN 128000 for guided auger boring. A trenchless technique, which involves jacking the GRP Pipe into the ground and removing the excavated soil through the inside of the pipe with augers in a steel casing. As a result, the inside surfaces of the pipes are subject to substantial loads. HOBAS Pipes have an abrasion-resistant internal surface and during the project proved once again that they can also be used for this installation method. Prior to laying the pipes, HOBAS experts developed the storm overflow concept in cooperation with Achim Konrad from Feldbach town council and Bernhard Schilcher from Lugitsch Ziviltechniker GmbH. It was at this stage that they also decided to use jacking pipes made of GRP. The decisive factor was not only the HOBAS team’s commitment, but also the competitive quotation from HOBAS Pipe Austria for the 6 m pipes. The project tender did not specify any particular installation technique. RBS Rohrbau-Schweißtechnik GmbH was awarded the contract for its proposal of auger boring and provided advice during project planning. The only drilling company capable of boring the required diameter, RBS used HOBAS GRP Pipes for auger boring for the first time.