The construction of a 25km tunnel under London’s river will prevent the tens of millions of tonnes of pollution that currently pollute the River Thames every year.

This necessary expansion of London’s sewer network is due for completion in 2024, and is happening across 24 construction sites in London. These span from Acton in West London to Beckton in the East, and many are located on the river edge in the centre of the city.

Ralspeed are responsible for refurbishing containers for use on Tideway. One use of the containers is to de-water the excavation for the assembly of a tunnel boring machine in Central London.

The containers incorporate:

  • Automatic Mains Failure Panel (AMF), performing changeover between mains and generator in the event of power failure.
  • Distribution section to the various equipment in the container.
  • Customised PLC panel used to control multiple pumps and functionality.
  • Combinations of 4&6 Way starter panels with bore hole pumps at strategic locations around the site
  • Each starter has a built-in wide ranging overload, variable earth leakage protection, pump thermistor/klixxon options and programmable I/O.

Ralspeed were also asked to attend the first site to commission the PLC system and this particular one has been operating for over a year.

Info on tideway: https://tideway.london/the-tunnel/

Images show before and after inside the container.

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