I've got no idea, but 216m is 240yds, so 12 x 60ft panels maybe?Why 216m? Is it simply a case of "it's always been that", or is there some sort of very logical explanation?
I've got no idea, but 216m is 240yds, so 12 x 60ft panels maybe?Why 216m? Is it simply a case of "it's always been that", or is there some sort of very logical explanation?
That sounds reasonable. Therefore it simply cannot be the correct answer! (Though it probably is.)I've got no idea, but 216m is 240yds, so 12 x 60ft panels maybe?
I think it’s twice the length of the manufactured rail. IIRC the rail welding plant at Eastleigh is designed to join two lengths of 108m.Why 216m? Is it simply a case of "it's always been that", or is there some sort of very logical explanation?
Though again, that begs the question "why 108m?". As zwk500 says, it's probably based on the conversion from imperial standards.I think it’s twice the length of the manufactured rail. IIRC the rail welding plant at Eastleigh is designed to join two lengths of 108m.
Either drag it (as you say) or I have seen small tracked gantries do the job.For the Balfour Beatty machine, I was wondering how, (or if), the foot of the rail is protected, assuming they have to pull it along the ballast? Presumably for a renewal the delivery train can position it outside the existing tracks beforehand, but it looks to be a weak aspect of the new construction process...
Why 216m? Is it simply a case of "it's always been that", or is there some sort of very logical explanation?
I've got no idea, but 216m is 240yds, so 12 x 60ft panels maybe?
Thanks - that also seems like as good a reason as any!To be honest I don’t know. I always assumed it was a metric conversion of an imperial measure, but appears not to be.
216 is 236 yards, so that doesn’t quite stack up.
It might be as simple a the maximum length the rolling mill can do.
I think it’s twice the length of the manufactured rail. IIRC the rail welding plant at Eastleigh is designed to join two lengths of 108m.
Excellent! I hope so, I thought it might only be a spur for ballast delivery.In the shorter term the focus is getting the section Bicester - Calvert sectional operation for HS2 material deliveries hence starting relaying from Bicester. Calvert - Bletchley is 1-2 years behind that.
It's a bit weird/worrying that while it still features on the route map, there's no mention of the route via Aylesbury on the NR websiteExcellent! I hope so, I thought it might only be a spur for ballast delivery.
I had read that tracklaying wouldn't happen until 2022:
2021:
Build a new station at Winslow
Prepare the ground for the new railway to be constructed
Begin work to build a new road bridge at Charbridge Lane in Bicester
Continue with our bridge and structure refurbishments
Rebuild Bletchley flyover
2022:
Install the new railway tracks
Complete Bletchley flyover work
Installation of the new railway track will be completed between Bicester and Claydon Junction
Begin putting in the new signalling system, power and communications systems
Bicester to Bletchley/Milton Keynes - Network Rail
For the first time in over 50 years, Phase 2 will create direct connections between Oxford and Bletchley/Milton Keynes This project will link communities across the area, bringing faster journey times and easing pressure on local roads. To deliver East West Rail Phase 2, the EWR Alliance was...www.networkrail.co.uk
Aylesbury Claydon is "paused"It's a bit weird/worrying that while it still features on the route map, there's no mention of the route via Aylesbury on the NR website
So a guy who doesn't even live there says that "People are frightened for their communities’". I especially like "Sagentia, like many Cambridge companies, is aiming for a global market and requires international travel or good fibre optic links rather than passenger links to Bletchley" as if the concepts of good local and international links are incompatibleSebastian Kindersley was speaking after the publication of the East West Rail Company’s consultation about its plans last week.
“People are frightened that their properties and their communities are going to be destroyed,” he told the Cambridge Independent. “There are people who see that the alignment map shows the bottoms of their gardens disappearing.”
Mr Kindersley is chairman of the CamBedRailRoad, which is campaigning for a northern approach to Cambridge to be evaluated to the same degree as alternative routes.
He continued: “I think if I was a resident of one of the impacted parishes, I’d find it very difficult not to go out with a placard right now and start marching up and down.
60' = 18.29mAll the metric lengths mentioned in this discussion - 216m, 108m, 36m, 72m - are multiples of 18m.
60ft to the nearest metre is 18m.
So it looks like a case of premature rounding.
HS2 contractors begin work on key East West Rail bridge
Contractors working on High Speed 2 (HS2) have begun construction of a key bridge where the East West Rail line will cross the high speed rail route in Calvert, Buckinghamshire.
As I see it the line past Aylesbury Vale Parkway (AVP) already exists and will have to be reinstated, as it’s needed for access to the existing Calvert waste handling facility, (that HS2 are resiting anyway)."Alongside the bridge, HS2 will also deliver a new junction that could allow East West Rail trains to also serve Aylesbury and Aylesbury Parkway."
Quote from the informative article above. Answers a few questions. So a junction will be there but not necessarily the line to Aylesbury Parkway.
Good to hear, but ...HS2 contractors begin work on key East West Rail bridge | New Civil Engineer
To simplify both projects and reduce disruption for the local community, 3km of earthworks and bridges for the East West Rail project are being deliveredwww.newcivilengineer.com
Article from New Civil Engineer. In summary:
Excellent integration of two vastly different projects!
HS2 as they are effectively altering exiting alignment, the rest is not covered is EWR's problem...Good to hear, but ...
Who is paying,
and does it matter? I guess it will be clear as to which contract (and contractor) is responsible for this, esp if (when) something goes wrong
I would imagine (could be wrong) that as a general 'principle' whoever comes after should pay, eg a 'new' railway regarding bridges or level crossings for pre-existing roads?
Neither EWR nor HS2 are private concerns, they are both essentially creatures of government so any dispute will just come from taxpayers by one route or another (and cost more in total than if there was no dispute).Good to hear, but ...
Who is paying, and does it matter? I guess it will be clear as to which contract (and contractor) is responsible for this, esp if (when) something goes wrong
I would imagine (could be wrong) that as a general 'principle' whoever comes after should pay, eg a 'new' railway regarding bridges or level crossings for pre-existing roads?
As both EWR and HS2 are private concerns this could be important for their shareholders, stakeholders and ultimately customers?
Any Forumers know?
Ha ha! If only you knew....HS2 contractors begin work on key East West Rail bridge | New Civil Engineer
To simplify both projects and reduce disruption for the local community, 3km of earthworks and bridges for the East West Rail project are being deliveredwww.newcivilengineer.com
Article from New Civil Engineer. In summary:
Excellent integration of two vastly different projects!
The new facility is effectively a set of sidings and a cripple off a loop at Greatmoor opposite the waste to energy plant. I would be surprised if it isnt on the web as a planning application somewhere.I would guess that the line from Aylesbury Parkway to wherever HS2 starts to use part of the existing formation would have to be upgraded and re-laid, AP station itself will need a new platform (s)? The article only states the junction will be delivered by HS2 (and probably connected by EWR) I would also guess that whilst HS2 are constructing their long cutting section they may leave a bare formation above on the eastern side for future EWR construction. We will have to wait and see. I would be interested to see a track plan of the new Calvert Waste Facility if anyone would share.
It’s a TWA order. Here’s the link, but I suspect detailed discussion is getting off topic for this thread:Ha ha! If only you knew....
The new facility is effectively a set of sidings and a cripple off a loop at Greatmoor opposite the waste to energy plant. I would be surprised if it isnt on the web as a planning application somewhere.
As both EWR and HS2 are private concerns this could be important for their shareholders, stakeholders and ultimately customers?
I would be surprised if it isnt on the web as a planning application somewhere.
It’s a TWA order. Here’s the link, but I suspect detailed discussion is getting off topic for this thread:
HS2 Greatmoor Railway Sidings: Transport and Works Act order
Approval to construct railway sidings adjacent to the Aylesbury Link Railway.www.gov.uk
I would guess that the line from Aylesbury Parkway to wherever HS2 starts to use part of the existing formation would have to be upgraded and re-laid, AP station itself will need a new platform (s)? The article only states the junction will be delivered by HS2 (and probably connected by EWR) I would also guess that whilst HS2 are constructing their long cutting section they may leave a bare formation above on the eastern side for future EWR construction. We will have to wait and see. I would be interested to see a track plan of the new Calvert Waste Facility if anyone would share.
The image below is an extract from the Environment Agency flood risk map. The dark and light blue areas represent flood zones 3 and 2 respectively (in popular parlance, ‘floodplain’).
The dark blue shading with white diagonal stripes denotes areas benefitting from flood defences.
...
There is a further issue in that (unlike houses) building a long embankment across a floodplain traps flood water, often exacerbates flood risk nearby or further upstream and can have serious effects on water flow and ecology downstream. This requires significant infrastructure interventions such as drainage and viaducts in order to avoid and mitigate these impacts.
My masters is in common sense*: if you build a big bund in a river valley chances are you’re gonna have problems!My masters degree in civil engineering majored in hydrology, and one case study was the effect of an abandoned railway embankment on a flood plain. Quite scary how it can back up the water. Ryther Viaduct on the Selby Diversion is a good example of how to get around the problem.
Received one of those in Oxford this week. Quite odd - every house in Oxford would too - am not sure the value of that. Pretty much every other decision has already been taken (and is under construction) that has relevance west of Bletchley.. no wonder consultation is expensive. I will read it, but there are literally thousands of these documents going straight to the recycling box around here.This has just appeared in my letterbox addressed to the occupier (I’m in the Bicester area), one thing to note (if it hadn’t already been said enough times already) is that Aylesbury and AVP are showing as potential future sections and not part of the initial project.