Sewage pressure pipeline with leakage monitoring at the Söse Dam
The new sewage pressure pipeline with leakage monitoring at the Söse Dam meant to replace the previous asbestos cement canal. The pipeline had to be installed through class I and II drinking water protection zones. Against this background, the egeplast 3L Leak Control System with 100 percent leakage monitoring was selected for the newly installed pipeline featuring a total length of 4,500 m. Most of the installation was performed using the static burst lining method.
“For the crossing of drinking water protection zones class I and II the 100% monitored 3L Leak Control was required.”
Benedict Mahler
Harzwasserwerke, one of the biggest water suppliers in Lower Saxony and the operator of several reservoirs in the area, is also the main party in charge of the sewage pipelines at the reservoirs. At the Söse Dam, an old DN 200 asbestos cement canal needed to be rebuilt. The planned construction of the new sewage pipeline was an ambitious project mainly because the sewage needs to be discharged through class I and II drinking water protective zones. Accordingly, the customer opted in favour of shaft systems such as fitting shafts and aeration shafts with 100 percent leakage monitoring. The egeplast 3L Leak Control pipes, combined with the matching shaft systems, met the high requirements related to the sewage pipe to be installed. All in all, 4,500 m of new pipeline were installed. The installation was performed in sections, 3,800 m applying static burst lining and 700 m using the open-trench method.
The construction period of the new pressure pipeline with leakage monitoring at the Söse Dam extended over more than three years. To facilitate smooth operations for this complex construction measure, several subsequent measurements were performed after the initial on-site instructions to ensure an ongoing documentation of damagefree installation. After the final acceptance, the system was ready for commissioning and able to allow for continuous monitoring.
egeplast
3L Leak Control
| Permanently monitored Piping System that finds and reports Damages |
| additional protective layer made from PEplus |
| electrical conductive layer/detection layer made from aluminium |
| inner pipe made from PE 100-RC |
Project data
| Project description | Construction of a new sewage pipeline at the Söse Dam |
| Challenges | Crossing of drinking water protection zones class I and II Use of fittings shafts and aeration valves |
| Solution | 3L Leak Control pipe system and 3L Leak Control shaft systems |
| Construction phase | Static burst lining and open-trench methods |
| Pipe system | 3L Leak Control |
| Parties involved in the project | Client: Harzwasserwerke GmbH Planning: Pabsch Ingenieure GmbH (formerly Ingenieurbüro Richter) Installer: Rettberg GmbH & Co. KG |
Contact
Benedict Mahler
egeplast international GmbH
E-Mail: benedict.mahler@egeplast.de
Tel.: +49 2575 9710 171
