The tunnel boring machines drilling two new tube tunnels under South London have broken through at Kennington, having started their work at Battersea Power Station.

The machines undertook tunnel drives at depths of up to 26 metres to construct the 5.2 metre diameter tunnels. Each machine was capable of tunnelling up to 30 metres a day with teams of around 50 people operating them.

As part of the tunnelling drive, nearly 20,000 precast concrete segments were put in place to form rings to line the tunnels. Two junctions lined with iron rings will link the extension to the existing Northern line.

A conveyor system was used to take more than 300,000 tonnes of excavated earth to barges on the River Thames where it was transported to Goshems Farm in East Tilbury, Essex.

The cutter head of both machines will now be lifted by crane out of the shafts at Kennington while the rest of the machines will travel back to Battersea and be lifted, in parts, out of the ground there.

Now that the tunnels are completed, they have to spend the next couple of years fitting them out with the track bed, signalling and power supplies.

The Northern line extension is targeted for completion in 2020.


Be the first to know what's on in London, and the latest news published on ianVisits.

You can unsubscribe at any time from my weekly emails.

Tagged with: , ,

This website has been running now for over a decade, and while advertising revenue contributes to funding the website, it doesn't cover the costs. That is why I have set up a facility with DonorBox where you can contribute to the costs of the website and time invested in writing and research for the news articles.

It's very similar to the way The Guardian and many smaller websites are now seeking to generate an income in the face of rising costs and declining advertising.

Whether it's a one-off donation or a regular giver, every additional support goes a long way to covering the running costs of this website, and keeping you regularly topped up doses of Londony news and facts.

If you like what you read on here, then please support the website here.

Thank you

  1. Nigel Headley says:

    Looking at the map, it would appear that trains only pass through Oval heading towards Battersea. Am I missing something? (Unless each orange track contains two lines).

  2. oliver wright says:

    The southern tunnel passes very close to Oval, but does not connect with it. Instead the two orange tunnels link into the existing Kennington loop to join with the existing lines, stopping at Kennington.

    Nine Elms station is also a stopping point between Kennington and Battersea

Home >> News >> Transport News