How Was The London Underground Built?

16 September 2016, 14:04

London Underground

Mystery Hour Question

Gary, Ilford

When I travel on the London underground, I see so many tunnels.  Given the Victorians didn’t have any GPS, how were these tunnels built?

Answer

Name: Michael Croydon

Qualification: Underground miner

Answer: It's similar surveying equipment that is used in construction.  They find laser points and set lasers up to direct the line.  Keeping the laser in the centre, the next point will be 2 meters ahead and the laser will change its point to where the tunnel needs to go.  The Victorian probably used string line in a similar way.

 

 

Name: Tony, Ealing

Answer: They excavated all the ground and then built it from scratch from the bottom up.  It’s called cut and cover, and they did this because they didn’t have any other way to navigate the ground.

 

James O'Brien head in hands

'Which EU Law Are You Most Looking Forward To Losing?'

Ask Boris Johnson November 2015

This Is What Boris REALLY Thinks About Freedom Of Movement

Andrew Gwynne Clive Bull

Labour MP Comes Unstuck Over Immigration Policy

Comments

Loading...