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.

 

AfD James O'Brien

James O’Brien Has A Message For Those Cheering On The Success Of The AfD

Nick Ferrari received this call from an angry RyanAir pilot

Furious Ryanair Pilot Calls LBC To Reveal All About Working Conditions

Archbishop Justin Welby live on LBC

Boy In A Dress Is "Not A Problem", Says Archbishop Of Canterbury

Hillsborough mum Margaret Aspinall met survivors from the Grenfell Tower

Hillsborough Hero Meets Grenfell Survivors To Give Advice On How To Get Justice

Comments

Loading...