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Sewage Pipe Renewal Method (SPR method)

Facilities initially constructed in the wards area of Tokyo are now aging, with over 1,800 kilometers of culverts already exceeding their legal service life of 50 years.

We are systematically and efficiently engaged in rebuilding aging facilities using the asset management method.

In this process, we are using advanced technology such as rehabilitation method, which reinforces sewer pipes from the inside without digging up roads.

Overview of SPR Method

With this construction method, a PVC profile is wrapped around the inner surface of an existing sewer pipe to rehabilitate that sewer pipe. Construction can be done while sewage is flowing, without digging up roads. It can be used for various cross-section shapes, including circular pipes, horseshoe-shaped culverts, and even rectangular culverts.

As of the end of March 2021, this work has been performed on a total of approx. 169 km of sewer in Asia, North America, Europe, and elsewhere.

 

Award history

■Good Design Award (2013)

■Okochi Memorial Prize (2013)

■1st METI (Ministry of Economy, Trade and Industry) Minister's Monodzukuri Nippon Grand Award (2005)

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