Major progress made on HS2’s Copthall Green Tunnel
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- Опубліковано 12 чер 2024
- The 880m long Copthall Green Tunnel is located within the London Borough of Hillingdon, between Harvil Road in the west and Breakspear Road South in the east, and sits between the twin bored Northolt Tunnel and the Colne Valley Viaduct.
The Copthall Tunnel is one of five green tunnels on the HS2 route, which are shallower tunnels which will be finished with trees, plants and shrubs on top - helping them blend into the natural landscape. Materials from the excavation are kept on site and then reused on the tunnel surroundings, reducing movement of spoil.
In this latest update, we focus on the progress made on the tunnel such as the completion of the cut, the reopening of the new realigned Harvil Road, the works made on the central section, including the construction of the first vent stack and the work on the soil placement areas (SPAs).
In the Northern SPA, the planting of the first 1,300 plants has began. This is part of 70,000 individual trees, shrubs and bushes that will transform the area into a haven of biodiversity once the landscaping is complete.
The tunnelling team have excavated approximately 500,000m3 of TBM material which is being used to form three mounds within the Southern SPA, keeping the material within site boundaries at Copthall.
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0:00 Introduction
0:06 Latest works on the tunnel
0:43 What is the Copthall Tunnel?
0:59 The first vent stack
1:23 Rebar facility update
1:39 No lost time incidents
2:01 Backfilling over the tunnel
2:37 Latest environmental works
2:43 What is the NSPA?
3:10 What is the SSPA?
4:01 Update on the SSPA
4:23 Planting the first trees at the NSPA
5:10 Upcoming works on the tunnel
5:44 Outro
#HS2 #Construction #update #tunnel
If you have a question about HS2 or our works, please contact our HS2 Helpdesk team on 08081 434 434 or email hs2enquiries@hs2.org.uk. - Наука та технологія
This is the infrastructure this country needs, shame Rishi bottled it
Haha, get a grip - the country "needs this" like a hole in the head. Most of this monstrous vanity project has been scrapped & what's left will be nothing more than a glorified cycle path within a decade of opening (which will be in about 50 years time given the current rate of progress).
These promotional videos are so fake they're laughable.
A futile attempt to make HS2 look "environmentally friendly" but what they fail to mention is that HS2 Ltd have already incurred numerous fines for multiple breaches of environmental issues.
Thousands of trees planted along the route in Warwickshire where the vast majority perished due to lack of aftercare.
The pollution of streams, rivers & other waterways with toxic chemicals.
The bulldozing of mile upon mile of hedgerows containing nesting birds when they specifically promised to wait until the nesting season was over .. the list goes on.
HS2 is an environmental disaster of epic proportions & Britain's biggest infrastructure mistake in half a century.
That's why he needs to go. He's more interested in spending money on a Moderna vaccine plant!
@@stevenewbank .. a Moderna vaccine plant would be MUCH more beneficial than this monstrous vanity project.
It will be extended just slower than originally planned
@@gorgu08.. if it's extended (which is highly unlikely) & just "slower" than originally planned then it becomes just another commuter route & won't be any faster then existing services therefore, it's NOT HS2 so your point is totally invalid!
You guys are amazing. Shame the PM lost his nerve just before you were able to show us all the works. Let’s hope you get to go all the way to Manchester.
And futher! I want to see a hs2 that relieves pressure on BOTH the wcml and ecml.
He didn't have the nerve to lose to begin with. No foresight at all.
Doupt it - they started selling off the land for HS2
Now that the public have paid for this ' with their tax ' some billionair will own it ' & the public will wonder why they will have to pay exstortionate fares aswell 😩😢the public have been taken to the cleaners ' yet they moan about paying tiny amounts of tax ' for DWP' council 'ect !!! 🤣
Great job everybody! I look forward to seeing you bring this wealth of experience and practice all the way to Manchester. Oh wait...
Always an excellent informative video which really gives such an insight into many aspects of HS2 which are not usually considered part of building a brand new transport rail link.
Thanks for this video and explaining how the works at Copthall are going....
Monumental (and truly impressive) effort for a half-abandoned project.
It's so beautiful. Really hope it is revived somehow and actually brings wealth and connection to the North.
Its going as far as birmingham. Hardly bringing connection to the north
@@HonestMan112 Yeah, that was the point I was making. I was hoping it would eventually go as far as Glasgow- the original plan.
Can't wait for Rishi's pot hole filling videos 😅
Nice
Well
Done all scs team 👏🏻👏🏻👏🏻👏🏻
Really shame that is doesn't go up till Scotland and than some HS3 maybe cause it gives true real prosperity to the UK citizens and economy and if its really expensive i think this and some defence spending that UK at all isn't doing like warships shipbuilding or missile it gives a lot to the UK and this and that is the most citizen spend money that isn't just bulls.. and research and development. So UK gov wake up.
I love travelling by train, and I'm thoroughly content with buses and coaches for shorter journeys. But no way would I use HS2! On a normal train journey there's the sheer joy of witnessing the ever-changing scenery and sky. A journey I made from Kings Cross to Aberdeen comes to mind. Thanks to UA-cam videos, we now know that a large part of the HS2 route will be underground. So I reckon many travellers will continue to use traditional railway routes - overground!
We also need reopening to reconnect places. So more importantly load of people who don’t drive can access employment opportunities. Newbury is so car centric it’s so bad. My lungs are suffering as well. Can we not have a high speedish north south route to Southampton from didcot !
HS2 is such an amazing and benefitial project. Shame the short sighted PM decided to drastically curtail this project back to handsacre and left Euston in uncertainty in a quite clearly political move (wouldnt suprise me if it fell victim to the pro-car junk that Sunak did after Tuckwell won in Uxbridge). Lets just hope that at least the Crewe leg gets brought back at the minimum in order to let HS2 truly fufill its purpose.
Wonder how many lobby palms were 'greased' when the decision was made to can section 2a?
Why is it referred to as Copthall Green?There doesn’t appear to be any place of that name in the area on my maps!
It's not actually "Copthall Green" Tunnels, it's Copthall "Green Tunnels". Green tunnels refers to the type of cut and cover tunnels used on HS2, and this one is in Copthall.
Because it's adjacent to the soon to be built new town of Copthall?
Quite a lot of jargon in this otherwise excellent and good length video!
This is a business loaded with jargon. It’s difficult to avoid at least some of it.
Crazy this was even built - literally digging a cutting, before filling it in. It's a lovely idea in an ideal world but this just adds to the balooning cost
@jameslees7103 Tunnelling is extremely expensive, so if the required tunnel is not that deep, it may be cheaper to dig out a cutting, put the tunnel segments in place at the bottom and then backfill fill the cutting. Also, if the ground is not very stable, then I should imagine that when boring a shallow tunnel with a TBM, there may be a strong risk of the ground collapsing on the head of the TBM.
This cut-and-cover method is a technique that nineteenth century railway builders used for shallow tunnels (the Metropolitan Line in Central London was constructed this way).
I'm pretty sure the engineers planning and costing the HS2 works have worked out that the cut and cover technique is the cheapest/safest one in this particular case.
@johnevans2044 quite so. As a former pre construction manager working for a national Contractor it is apparent there is a common human failing where some people who can maybe do a bit of DIY or have built a house extension think they know all about the construction industry, when they know nothing.
@@TrevorWilliams-fq8mg A trifle savage.
Fully agree with you regarding inept politicians (all of them). And as you say it was started in London for political reasons. Can't see how the channel tunnel delayed HS2. The original 32.70 billion budget for HS2 was a figure pulled out of the air by HS2 as the government indicated 32.70 billion was the maximum cost they would sanction so HS2 told the government it could be built for that figure. Therefore the 32.70 billion figure has no credence. Which therefore makes a cost comparison between the 32.70 billion hypothetical figure and what it really costs irrelevant. The construction contract HS2 has been let on is the new engineering contract (NEC) option C actual target cost which is the same contract used for crossrail. It requires the Contractors to provide a fully audited paper trail of all costs. It also requires the Contractors to provide early warning notices to HS2 if an event occurs which might increase costs or increase time duration. As the project design is a continuous ongoing exercise the early warning notices become a continuous ongoing exercise so the cost keeps going up and will do so until all design work and all planning requirements become fully known.
I love the railways, and fully support HS2, but can someone please explain why there needs to be so much destruction of the area surrounding the tracks. It's a two track railway for heavens sake, so why is all the earth works along its length 300 to 500 meters wide. And why is there not even a meter of track laid yet?
🇬🇧🫡
32 miles of tunnels and vanity bridges in the home counties are the reason why the project was so over budget. HS2 is half a project. The levelling up of the North is a joke.
What’s a ‘vanity bridge’?? Trains can’t go down one side of a valley and up the other.
The real reason why it's over budget is due to the original 32.70 billion budget being a figure pulled out of the air by HS2. This being the figure the government indicated to HS2 that would be the maximum cost they would accept to build the scheme.
@@TrevorWilliams-fq8mg HS2 should have started in Manchester. It would have been already built to Birmingham. London already has an underground system, cross rail and euro star. London has 9 million and Manchester 3 million. Manchester does not get a third of investment London gets. More like a 100th. Levelling up is a joke.
@@pwithnall it's a bridge with mirrors
@tommcmanamon8327 I don't disagree with it starting in Manchester but how do you know the Manchester to Birmingham leg would hsve been built by now.
Yeah great progress. How much?