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Author Topic: Engineering work to close St Ives branch Jan to Feb 2021  (Read 18937 times)
eXPassenger
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« Reply #45 on: January 12, 2021, 17:16:20 »

For some reason I am not seeing the images referenced today by RailCornwall.  I am using MS Edge and am logged in; images are showing fine in other posts.

If I reply using the quote button I can see the image URLs and if I copy them into the address bar I can open and see the images.

I had the same problem with his posting on 6 January but the posting on 7 January displays with no problems.

Any ideas please?
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paul7575
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« Reply #46 on: January 12, 2021, 18:21:04 »

Option for a 2 foot gauge line?
Those are ?guard rail? cast in chairs, usually seen on bridges and viaducts where there?s an obvious derailment risk.  Is it because of proximity to the sea, or maybe there?s a cliff rock fall derailment risk? 

Paul
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TonyK
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« Reply #47 on: January 12, 2021, 19:12:47 »

For some reason I am not seeing the images referenced today by RailCornwall.  I am using MS Edge and am logged in; images are showing fine in other posts.

If I reply using the quote button I can see the image URLs and if I copy them into the address bar I can open and see the images.

I had the same problem with his posting on 6 January but the posting on 7 January displays with no problems.

Any ideas please?

I'm using the Edge, version 87.0.664.75 64-bit, and it works fine. There aren't many options for compatibility, as there are in IE and Chrome. Maybe check for an update? Or try playing U2 at the same time, but otherwise I'm out of ideas.
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« Reply #48 on: January 12, 2021, 20:13:00 »

Option for a 2 foot gauge line?
Those are ?guard rail? cast in chairs, usually seen on bridges and viaducts where there?s an obvious derailment risk.  Is it because of proximity to the sea, or maybe there?s a cliff rock fall derailment risk? 

Paul

Not sure it is for check rails, thing the rails in the 4ft are to help maintain track alinement due to the curve.  Check rails are usually in the same chair as the running rails
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Starship just experienced what we call a rapid unscheduled disassembly, or a RUD, during ascent,”
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« Reply #49 on: January 12, 2021, 20:38:45 »

These 'non standard' new concrete sleepers with fixings for glanding rails ( with no evident flat bottom rails waiting in the adjacent cesses to be installed ) could well have been used because they were surplus to another track renewal job or another job elsewhere on Network Rail (NR» (Network Rail - home page)) was cancelled or deferred. Possibly Network Rail (NR) will comment.

It woud have been interesting and very good Personal Record (PR (Public Relations)) if Network Rail (NR) had said what age the track was that they were replacing to inform Joe Public just what a long service life railway track materials can have.
It is quite likely that the chaired concrete sleepers (that hold BH rail) were made between 1948 and 1955 AND it is understood they are to have a second life on the planned  extension of the Helston Railway! Compare that with the short life of materials being expensively used by Contractors to temporarily repair the thousands of potholes in Devon's roads.


Edit: VickiS - Clarifying Acronyms

« Last Edit: March 14, 2021, 19:18:27 by VickiS » Logged
TonyN
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« Reply #50 on: January 12, 2021, 21:41:34 »

For some reason I am not seeing the images referenced today by RailCornwall.  I am using MS Edge and am logged in; images are showing fine in other posts.

If I reply using the quote button I can see the image URLs and if I copy them into the address bar I can open and see the images.

I had the same problem with his posting on 6 January but the posting on 7 January displays with no problems.

Any ideas please?
With me it works in Edge and Chrome but not Firefox. Huh
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RailCornwall
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« Reply #51 on: January 12, 2021, 21:46:40 »

I'd assume that at least some of the track being replaced dates from the post 1960's rationalisation of the line and the subsequent cut back of the facilities at the Station to the bare bones single platform. Indeed if not earlier.
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Cornish bobby
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« Reply #52 on: January 13, 2021, 10:31:19 »

Heck of a lot of Steel sleepers in and along the line from Carbis Bay to St Ives.

I don't Understand the Quote from Rail Advent that this is the biggest investment in Track renewals in Cornwall since the 1950s, this relaying will extend the CWR (Continuously Welded Rail) laid from St Erth towards St Ives  that was installed about 4 years ago.
Would think the whole branch will be CWR after work is completed, so if 1 1/2 miles is being done then 3 miles has ALREADY been relaid with CWR.

There will still be a section by the golf course to be renewed when the current work is complete.
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IndustryInsider
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« Reply #53 on: January 13, 2021, 12:32:02 »

It woud have been interesting and very good PR (Public Relations) if NR» (Network Rail - home page) had said what age the track was that they were replacing to inform Joe Public just what a long service life railway track materials can have.
It is quite likely that the chaired concrete sleepers (that hold BH rail) were made between 1948 and 1955 AND it is understood they are to have a second life on the planned  extension of the Helston Railway! Compare that with the short life of materials being expensively used by Contractors to temporarily repair the thousands of potholes in Devon's roads.

I read in a staff briefing that some of the track dates back to the 1940s.
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paul7575
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« Reply #54 on: January 13, 2021, 13:01:15 »

Option for a 2 foot gauge line?
Those are ?guard rail? cast in chairs, usually seen on bridges and viaducts where there?s an obvious derailment risk.  Is it because of proximity to the sea, or maybe there?s a cliff rock fall derailment risk? 

Paul

Not sure it is for check rails, thing the rails in the 4ft are to help maintain track alinement due to the curve.  Check rails are usually in the same chair as the running rails
I intentionally didn?t mention check rails though, because they have a separate function to guard rails, the former are positioned to work against the back of the wheel flange, eg within points and crossings.
I guess we?ll see what they fit shortly, but presumably they?re being used because there?s no equivalent steel sleeper.
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« Reply #55 on: January 13, 2021, 16:53:18 »

Option for a 2 foot gauge line?
Those are ?guard rail? cast in chairs, usually seen on bridges and viaducts where there?s an obvious derailment risk.  Is it because of proximity to the sea, or maybe there?s a cliff rock fall derailment risk? 

Paul

Not sure it is for check rails, thing the rails in the 4ft are to help maintain track alinement due to the curve.  Check rails are usually in the same chair as the running rails
I intentionally didn?t mention check rails though, because they have a separate function to guard rails, the former are positioned to work against the back of the wheel flange, eg within points and crossings.
I guess we?ll see what they fit shortly, but presumably they?re being used because there?s no equivalent steel sleeper.

I am guessing the use of concrete sleepers in the location might be due to lateral forces, which the mass of concrete will help mitigate
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TonyK
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« Reply #56 on: January 13, 2021, 18:59:26 »

According to Network Rail, answering Peter in their Twitter feed:

Quote
Hi Peter, guard rails will be installed in these loops.  Used on tracks where there are bendy sections to catch the train should the unfortunate happen and a train is derailed.  They are also used over viaducts where the parapets may not be high enough. more pics in coming weeks

Bloomin' internet - ruins debate.
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eightonedee
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« Reply #57 on: January 13, 2021, 20:03:18 »

Quote
Quote
Hi Peter, guard rails will be installed in these loops.  Used on tracks where there are bendy sections to catch the train should the unfortunate happen and a train is derailed.  They are also used over viaducts where the parapets may not be high enough. more pics in coming weeks

Bloomin' internet - ruins debate.

But it doesn't stop all kinds of ill-informed speculation proliferating!
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TonyK
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« Reply #58 on: January 13, 2021, 20:30:06 »


But it doesn't stop all kinds of ill-informed speculation proliferating!

Not on here - speculation is usually very well informed.
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« Reply #59 on: January 13, 2021, 20:33:37 »

I must say I cant understand how this is being promoted as "the biggest investment in track renewals in Cornwall since the 1950's". The mainline has of course had Continuously Welded Rail (CWR (Continuously Welded Rail)) , and more recently there has been the re-doubliing of the track between St Austell and Truro. Does anyone know the basis of the investment claim?Or is it a misquote just relating to investment in the St Ives branch??


Edit: VickiS - Clarifying acronym
« Last Edit: March 14, 2021, 19:20:31 by VickiS » Logged
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