TPI January 2014

business & market news

Award for spiral-wound rehabilitation The special requirements of the sewer rehabilitation in the city of Ansbach, Germany, led to the SPR™ solution being selected. Sekisui Chemical Co, Ltd, contributed with its spiral-wound pipe rehabilitation method for the restoration of sewer networks in European cities.

spiral pipeline forming and pipeline rehabilitation method.

The city of Ansbach, located in Southern Germany, is a region with numerous buildings of historical value. It is also an area with a high concentration of residential houses, meaning that neither traditional methods of excavation nor conventional trenchless methods could be used for the rehabilitation of a brick-built sewer dating back to 1936. Sekisui SPR Europe proposed SPR to the customer, AWEAN. The spiral- wound product is based on the concept of ‘composite with existing pipe’, to make effective use of the structural strength remaining in the existing pipe. It does not require stopping of the water flow during installation, and so cuts construction time, costs and the impact on residents and the environment in surrounding areas, compared to methods that require excavation of roads. Materials can be carried into the pipeline throughmanholes, allowingminimisation of the above-ground workspace. The method can be used for out-of- round shapes, including complex egg- shaped pipe made of bricks. It can negotiate bends, and allows work to be carried out with continued use of the pipeline in the residential area. After inspection and cleaning of the 220m section of the sewer that needed to be rehabilitated, the winding machine was placed through a manhole into the host pipe. The winding machine wound the PVC profile to the requested egg-shaped form and interlocked the PVC profile strips to form a new watertight pipe. The intentional annular space between the old and the new pipe, which was filled with high-strength grout after the winding process, gives the new pipe its required static characteristic. Sekisui SPR Europe GmbH – Germany info@sekisuispr.com www.sekisuispr.com

Sekisui Chemical has been globally promoting the SPR spiral-wound rehabilitation product, which was developed in collaboration with Tokyo Metropolitan Sewerage Service Corporation and Adachi Construction & Industry Co, Ltd. In March 2013, Sekisui Chemical also achieved the 59 th Okochi Memorial Prize for the development and practical application of the automatic

Sekisui SPR Europe was instructed by AWEAN, which is responsible for the wastewater disposal of Ansbach, to renew 220m of an egg-shaped sewer with diameter of 1,200/1,600mm. The project in Ansbach has now been awarded the 6 th ‘Junkan no Michi Wastewater System Prize’ by the Japanese Minister of Land, Infrastructure, Transport and Tourism. Sekisui SPR Europe, a subsidiary of

The SPR spiral-wound method requires little space for rehabilitation equipment

After completion of the winding process, a new high-performance, watertight liner is formed

28

Tube Products International January 2014

www.read-tpi.com