The Anonymous Widower

Crossrail Are Uphill Excavating Again

In Coal Mining In Whitechapel, I described how the Crossrail contractors were using a technique called uphill excavation to connect the Crossrail tunnels to the existing Whitechapel station above.

In this document on the Crossrail web site, the company describes how the technique is being used again to connect the running tunnels to the Broadgate ticket hall above. This is said about the methods used.

This excavation will be carried out using an innovative method of uphill excavation. Traditional uphill excavation is considered unsafe due to the risk of excavated material falling onto the excavator and operatives, however the BBMV team realised that the ability to excavate upwards from existing tunnels at the base of the escalator shaft would generate significant time and cost savings. In response BBMV introduced a bespoke uphill excavator that is suspended from the ceiling of the construction tunnel and advances in line with the tunnel progression. A walkway along the side of the excavator provides the engineer with a safe working area and emergency egress for the operator. Once this excavation of this escalator shaft is complete we will begin to construct an access passage that will lead passengers from the Ticket Hall into the station tunnels, in early 2016.

There is also the first published picture I’ve found of an uphill excavator.

BBMV's Uphill Excavator

BBMV’s Uphill Excavator

I think we’ll find in the coming years that uphill excavation will be increasingly used in the construction of railways and other tunnels underneath towns and cities.

I’m sure, Crossrail 2 will use the technique to create stations at Angel, Chelsea and Tottenham Court Road. The biggest advantage is that it will silence the Militant Wing of the heritage lobby and all the luvvies, who are against London getting a better public transport system.

I also think, that we could build underground stations for HS2 at Euston, Birmingham, Manchester and Leeds, and use the technique to provide link tunnels to the existing stations above.

October 2, 2015 - Posted by | Transport/Travel | , , ,

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