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eightf48544
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« Reply #105 on: June 30, 2019, 14:49:47 » |
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It is quite likely that there has been a higher level of electrolytic action between the dissimilar metals, zinc, stainless steel, aluminium than expected causing the damage. Its possible not helped by the fact that the contact system has been bonded out for the last 4 years allowing circulating currents caused by the electrolysis to flow.
It's been along time since I did A level physics but could one have replaceable sacrificial anodes similar to those on my cousins steel hulled narrow-boat. He's got through about 3 sets of 4 in 20 years. |
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broadgage
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« Reply #106 on: June 30, 2019, 16:43:46 » |
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Presumably the damp and corrosive atmosphere in the tunnel was not known about in advance, and could not have been found by prior inspection ?
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A proper intercity train has a minimum of 8 coaches, gangwayed throughout, with first at one end, and a full sized buffet car between first and standard.
It has space for cycles, surfboards,luggage etc.
A 5 car DMU▸ is not a proper inter-city train. The 5+5 and 9 car DMUs are almost as bad.
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stuving
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« Reply #107 on: June 30, 2019, 18:26:26 » |
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Presumably the damp and corrosive atmosphere in the tunnel was not known about in advance, and could not have been found by prior inspection ?
If you think through what "prior inspection" would involve, I suspect that's right. As ET has pointed out (including when this topic came up before) that tunnel is know to be as bad as it gets for corroding metals. And among tunnels with OLE▸ inside, let's say it was known beforehand to be worse than anywhere done before. What next? Assume Plan A is to choose, among kit that's available to buy, whatever has the best performance in this respect. (I know that in practice it may have been F+F's system or nothing, but put that to one side for now). Is there a better plan B? You'd need to quantify how much worse this tunnel is than the standard bad tunnel the design was based on ... if it was. What do you sample? Where? How do you test it? Ultimately, I suspect the answers would be of limited use, and you'd end up needing to do some full-scale tests - installing lengths of OLE to see what happens, ideally of several possible designs. Then, of course you wait and see - for at least ten years to show that Plan A would have been OK ten years ago. Of course you'd find out quicker if you need a new system. So ask the boss, "do we have ten years?" I'm beginning to see the attractions of plan A. |
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Oxonhutch
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« Reply #108 on: July 01, 2019, 07:05:20 » |
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It's possible not helped by the fact that the contact system has been bonded out for the last 4 years allowing circulating currents caused by the electrolysis to flow.
I think ET put his finger on the main driver. That was not part of the original design which envisaged electric trains into South Wales by now. |
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Adrian
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« Reply #109 on: July 03, 2019, 19:56:26 » |
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Earthing straps intended for 25 years but decaying after 4. Expert suggests that a compromise solution is available in running the trains on diesel for 6 or 7 km. "You would not notice" switch from electric to diesel, and you'll still get electric trains in Cardiff. However, it's said that Network Rail are also looking for alternatives.
Running IETs▸ on diesel through the tunnel might be possible, but it would rule out any possibility of using 387s as crowd-busters on event days in Cardiff. |
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grahame
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« Reply #110 on: July 25, 2019, 17:37:22 » |
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Further closures this summer and autumn, from Network Rail media centreOn Saturday 27 and Sunday 28 July, buses will replace trains between Bristol Parkway station and Cardiff Central station as engineers will work around the clock on the railway to continue installing the overhead line equipment.
Further work is planned on weekends throughout the summer and autumn months with buses replacing trains on the following dates:
Sunday 25 August (until 14:00, when coaches replace trains between Bristol Parkway and Newport instead)
Sunday 8 September (until 14:00)
Saturday 14 and Sunday 15 September
Sunday 22 September (until 14:00)
Sunday 29 September (until 14:00)
Sunday 13 October (until 14:00)
Sunday 20 October (until 14:00) |
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Coffee Shop Admin, Chair of Melksham Rail User Group, TravelWatch SouthWest Board Member
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froome
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« Reply #111 on: July 26, 2019, 08:44:59 » |
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As it happens, I have to travel from Bath to Newport on Sunday October 6th. Looking at that list, I seem to have struck very lucky in having the only Sunday without bustitution, but how likely is it that trains will actually run when that weekend finally arrives?
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phile
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« Reply #112 on: July 27, 2019, 14:47:36 » |
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As it happens, I have to travel from Bath to Newport on Sunday October 6th. Looking at that list, I seem to have struck very lucky in having the only Sunday without bustitution, but how likely is it that trains will actually run when that weekend finally arrives?
6th Ooctober is not in that list, normal service |
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froome
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« Reply #113 on: July 28, 2019, 07:14:35 » |
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As it happens, I have to travel from Bath to Newport on Sunday October 6th. Looking at that list, I seem to have struck very lucky in having the only Sunday without bustitution, but how likely is it that trains will actually run when that weekend finally arrives?
6th Ooctober is not in that list, normal service Yes I know that, but how likely is it that they will keep to that? I've planned trips in similar circumstances and found late changes have meant buses have replaced the train I had hoped to use. However, it is notable that this is the one Sunday missing from a long list, so there is presumably a reason for that. Does anyone know what that might be? |
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phile
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« Reply #114 on: July 28, 2019, 10:17:31 » |
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As it happens, I have to travel from Bath to Newport on Sunday October 6th. Looking at that list, I seem to have struck very lucky in having the only Sunday without bustitution, but how likely is it that trains will actually run when that weekend finally arrives?
6th Ooctober is not in that list, normal service Yes I know that, but how likely is it that they will keep to that? I've planned trips in similar circumstances and found late changes have meant buses have replaced the train I had hoped to use. However, it is notable that this is the one Sunday missing from a long list, so there is presumably a reason for that. Does anyone know what that might be? Sorry, misread your post. |
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grahame
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« Reply #116 on: November 23, 2020, 08:59:03 » |
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Well - we are SUPPOSED to be in lockdown, only travelling to work if we cannot work from home or for essential shopping or exercise, though from seeing some of the pictures at places like the Whitehall Garden Centre and reading what is reported https://www.wiltshire999s.co.uk/parking-issues-and-safety-fears-as-thousands-visit-whitehall-garden-centre/Dozens of locals have raised concerns over the vast number of people visiting Whitehall Garden Centre near Chippenham over the weekend.
Visitors have been accused of ignoring the government?s current restrictions, but rules do permit people to visit shops open to the public ? including garden centres.
Despite the centre putting in place the required precautions and following the COVID-secure guidelines, it hasn?t stopped families eager to view the Christmas display from flocking there.
Throughout the weekend, dozens of vehicles were parked along Corsham Road and other nearby streets, some parked illegally on junctions and blocking assess to farmers? fields.
Families ? some with small children and pushchairs ? could be seen walking up and down the road which has a national speed limit (60mph).
?It?s not our fault that a large amount of people tried to visit us today?, the firm?s marketing manager Charlotte Self said, commenting on yesterday?s parking concerns.
Adding that the centre has ?restricted the number of people allowed in? at any one time.
Miss Self told local residents ?we?re trying our best?, mentioning that closing the establishment unnecessarily would mean they ?couldn?t support their 180 staff?.
To reduce the spread of coronavirus, Whitehall Garden Centre has placed sanitising stations throughout and completely restructured the farm shop and checkout areas. I will be at home ... having said which, I have a 10 a.m. zoom meeting so I'll sadly have to miss the program ... |
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Coffee Shop Admin, Chair of Melksham Rail User Group, TravelWatch SouthWest Board Member
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grahame
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« Reply #117 on: December 07, 2020, 13:37:39 » |
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Looks like the council took the same view ... https://www.wiltshire.gov.uk/news/COVID-direction-order-successful-at-Whitehall-Garden-CentreWiltshire Council has successfully implemented a COVID Direction Order after it required a local business to make a number of improvements to ensure it can operate safely and protect public health.
Whitehall Garden Centre in Lacock was issued with a COVID Direction Order and had to take actions to comply with restrictions to help prevent COVID-19 transmissions within the county.
The centre took necessary steps to improve their systems to achieve the public health requirement and manage the risk to Wiltshire residents by ensuring appropriate measures were in place.
The centre was issued with the directions, issued under the Health Protection (Coronavirus, Restrictions) (England) (No.3) Regulations 2020 on Monday 30 November. This directed the management of the garden centre to comply with a number of directions, including review car parking arrangements, implement more measures to ensure customers can visit in a COVID secure way such as an improved queuing system, floor markings and one-way system; increase staff training and much more careful monitoring of customer numbers on the premises. As I have not seen a rash of notices like this, can I read into this that for some reason it was especially necessary in this case? |
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Coffee Shop Admin, Chair of Melksham Rail User Group, TravelWatch SouthWest Board Member
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grahame
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« Reply #118 on: August 15, 2023, 07:45:52 » |
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Cancellations to services between Bristol Parkway and Cardiff Central
Due to a broken down train between Pilning and Severn Tunnel Jn some lines are blocked. Disruption is expected until 08:00 15/08.
Train services between Bristol Parkway and Cardiff Central may be cancelled or delayed.
Customer Advice
We're sorry for the delay to your journey.
A freight train has broken down in the Severn Tunnel blocking one of the two lines. While arrangements are being made for an engineer to attend to fix the train we are able to use the other line, but this means we have to run a reduced service.
We will update this message with more information when we have it. Sound like a quick fix is expected. For which relief, much thanks - line via Lydney closed this week. |
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Coffee Shop Admin, Chair of Melksham Rail User Group, TravelWatch SouthWest Board Member
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GBM
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« Reply #119 on: August 15, 2023, 08:03:14 » |
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There's a 5Q86 sulking between Severn Tunnel West and Severn Tunnel Junction.
Single line running around it.
Can't see a 5Q86 on RTT» tho'
Journeycheck was showing disruption until 8am, now extended to 10am
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Personal opinion only. Writings not representative of any union, collective, management or employer. (Think that absolves me...........)  |
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