HS2 Over

[Big J]

14 minutes ago, lux said:

I always liked that Nordic noir crime series , 'The Bridge' 

Maybe we can have 'The Tunnel' next .......... 

 

 

 

Who'd have though it? Nordic Noir could get even darker. 

 

Though I'm sure they'll have lights 😄

[Peasgood]

1 hour ago, Big J said:

How on earth can building two train tracks across fairly flat English countryside cost more than three times as much as constructing a 4 lane motorway and 2 lane train tracks on the sea bed? 

I should think there would be massive savings by not having to have newt surveys and archeological reports on the seabed. They will be fecked if the bats find it and decide it's a cave though, perhaps they just work on the assumption that it will be finished by then or maybe they put it down as ecological mitigation.

[Big J]

28 minutes ago, Peasgood said:

I should think there would be massive savings by not having to have newt surveys and archeological reports on the seabed. They will be fecked if the bats find it and decide it's a cave though, perhaps they just work on the assumption that it will be finished by then or maybe they put it down as ecological mitigation.

 

I see what you're saying, but surely there must be fairly substantial environmental assessments for a seabed tunnel too? 

 

 

[GarethM]

US to get first dedicated high-speed railway – built by Network Rail

INEWS.CO.UK

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The move comes just months after the northern leg of the UK's own high-speed rail service HS2 was scrapped

 

 

[devon TWiG]

3 hours ago, Big J said:

I've just become aware of the Danes building a sub-sea tunnel from Rødbyhavn to Puttgarden (I'm a little slow - they've been planning it for over a decade).

 

The projected cost for it (to be completed in 2029) is 6.1 billion euros, or 340 million per kilometer. 

 

HS2 will cost around £1 billion per kilometer, by the time it's finished. 

 

How on earth can building two train tracks across fairly flat English countryside cost more than three times as much as constructing a 4 lane motorway and 2 lane train tracks on the sea bed? 

 

And I bet the Danes finish the tunnel first too.

You have obviously overlooked the fact that LAND , houses farms etc does not need to be purchased to build a tunnel !!!!

[GarethM]

Was that the one where they built concrete sections and floated them out after excavating a bit trench ?.

[Steven P]

16 minutes ago, devon TWiG said:

You have obviously overlooked the fact that LAND , houses farms etc does not need to be purchased to build a tunnel !!!!

 

but tunnelling is about the most expensive civil engineering there is

[GarethM]

7 minutes ago, Steven P said:

 

but tunnelling is about the most expensive civil engineering there is

I'm not so sure, bridge = maintenance forever of the structure.

 

Concrete tunnel is a sealed thing, a lot of the recent tunnels are expensive because they actually buried 1 or 2 TBM as they started at both ends and did a 90 in the middle.

 

If memory serves there's a couple still in the channel tunnels.

[Big J]

36 minutes ago, devon TWiG said:

You have obviously overlooked the fact that LAND , houses farms etc does not need to be purchased to build a tunnel !!!!

 

Even so. The engineering complexity is on a completely different level. Are you saying that the property purchases are where the extra £700 million per kilometre has gone? A million quid every 5ft, or so.....

[Big J]

32 minutes ago, GarethM said:

Was that the one where they built concrete sections and floated them out after excavating a bit trench ?.

 

Yes, I believe so. Construction started in 2021 and is due to complete in 2027 for a 2029 opening.