HS2 Construction Updates - Copthall Tunnel

[bib]

Found a new video on youtube of a flyover of Copthall tunnel - a 550m cut and cover tunnel located between West Ruislip tunnel portal and the Colne Valley viaduct.

Some additional drawings/maps in the following document:

https://assets.hs2.org.uk/wp-content/uploads/2022/06/Copthall-Tunnel-and-NSPA_Community-update_290721-Final.pdf

 

[Fazaar1889]

Oh it's cut an cover... That makes sense now..

 

[HSTEd]

That's some really chunky rebar visible!

Surprised they didn't go steel-plate-composite at that point.

 

[Bald Rick]

That soundtrack! Niiiiice.

 

[Snow1964]

Latest update, covers the Colne Valley viaduct, Copthall tunnel and Ruislip area (19 page pdf with map location diagrams)

https://assets.hs2.org.uk/wp-content/uploads/2023/02/Hillingdon-February-2023-Construction-look-ahead-Align-SCS_EG-review_10-Feb-2023-00315.pdf

 

[bib]

another flyover, looks like they're starting to put a roof on the portal

 

[bib]

Another video update on youtube, the decking for Harvil road bridge is now in place, plus maybe 150m of sidewall, final plan illustration below for comparison

 

[bib]

Western Portal is now complete

 

[vic-rijrode]

Western Portal is now complete

Oh dear, I am getting old. Sara the Site Engineer looks about 15!

 

[bib]

A video showing the view from the Chiltern line running past colne valley , copthall tunnel to West ruislip, plently of work going on in this section although a limited view from the train

 

[Snow1964]

New drone video from nearby, Stoke Mandeville area

 

[cuemaster]

A couple of photos of the southern end of Harvil road which crosses over the chiltern line, pics looking eastwards towards Ruislip way. The realignment of HR over the new Copthall tunnel looks pretty much complete and will endeavour to picture that next time I’m cycling by!

 

[bib]

new flyover video, steady progress

 

[bib]

Another flyover video, quite a bit of the roof on and starting to backfill the first part of the tunnel. You can see the end of the Colne valley viaduct and launch girder in the background

 

[bib]

Flyover from Copthall to Colne Valley

Shows Colne Valley viaduct and the approach to West Ruislip portal in the first minute or so

 

[LNW-GW Joint]

On the Colne Valley viaduct at the end of the video, I make it 8 piers until the girder building the viaduct reaches "dry land" at the south end, out of 54 in total.
That's good progress in recent weeks.
Parts of the route are beginning to look like a railway at last.

 

[Snow1964]

Another YouTube video has appeared where Road has been diverted at end of Copthall tunnel

 

[bib]

Pretty big vent shaft under construction

 

[Snow1964]

New you tube of Copthall tunnel construction

 

[Geogregor]

Official HS2 video:

 

[Snow1964]

New drone flyover video of HS2 near Copthall tunnel, not the tunnel construction, but the mounds being created from excavated material

 

[Snow1964]

New drone flyover in Copt hall tunnel area, showing the huge ventilation tower

 

[bib]

Drone video showing the first vent stack is now open, backfill continuing

 

[Snow1964]

New drone video, showing Copthall tunnel latest

backfilling the viaduct end is progressing
construction of cut and cover tunnel still going on at other end

 

[bib]

Colne valley and copthall tunnel flyover, still quite a bit to go

 

[swt_passenger]

Another video update about Copthall green tunnel by “cuemaster”. Towards the end there’s a few seconds showing the launch girder Dominique is now completely off the Colne Valley viaduct.