Techno Mum: I saw a news report about the new railway being built under London. How do they dig tunnels for trains without them collapsing?
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Ep 15 – Digging tunnels involves some very specialised engineers, and how they dig tunnels depends upon what they have to tunnel through. Techno Mum explains how we use Tunnel Boring machines to dig underground tunnels!Join Fun Kids Podcasts+: https://funkidslive.com/plusSee omnystudio.com/listener for privacy information.
Techno Mum: I saw a news report about the new railway being built under London. How do they dig tunnels for trains without them collapsing?