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All across the Great Western territory / Across the West / Re: Reading Station improvements
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on: September 12, 2015, 11:01:22
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Ooh, look! The OHLE fairies have been back to Reading again!
Now I don't know whether the stays are for strength, rigidity, or both, but one is obviously not much use.
The stays transfer the catenary tensioning forces to the ground. Thus reducing the bending forces on the uprights. In the picture shown, assuming the stays are in compression, the OHL▸ will be coming from the left of the picture to be terminated on the portals. Yes, two stays are needed otherwise the structure will twist. |
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Sideshoots - associated subjects / News, Help and Assistance / Re: Character recognition / interpretation
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on: August 27, 2015, 14:19:32
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I'm not sure whether it is just me (or rather my laptop settings), but several posts recently have apparently been infiltrated with gobbledygook...... Is it a case of some devices have different interpretations for the apostrophe (for example)?
It's not just you - and I'm very much aware of the issue. All to do with character sets and database save and restores. I need to do some clever work to sort it out at some point. I had the same problem. Settings for the database and trying to save with utf-8 didn't make any difference. I don't know if you are using mysql and php, but I eventually discovered that the php statement:- mysql_set_charset('utf8'); placed before getting any data from the database did the trick. |
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All across the Great Western territory / Across the West / Re: Station Usage Figures
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on: December 05, 2014, 17:42:56
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.xyz is not a file extension that either I or Microsoft recognise so what program do I need to open this file then? It's a plain text file. We use that extension for data files that we don't want to be opened by a default application but rather saved / offered as 'unknown' for programatic use on our training courses. It's a Tab separated text file. Best to rename it .txt and then open it in the spreadsheet of your choice, selecting Tab as the field separator. Hope this helps. |
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All across the Great Western territory / Across the West / Re: Great Western Main Line electrification - ongoing discussion
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on: October 19, 2014, 18:05:49
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This weekend they have been installing a new bridge at Foxhall Road in Didcot. Given the width of the abutments looks like it me be 2-way whereas the old bridge was only a single carriageway. can anyone confirm that?
Nope. It's a single carriageway, and they are even leaving the footpath cantilevered off the side. The replacement appears to me to be a two way bridge. The drawing shows a Northbound cariageway and a Southbound carriageway. The width between kerbs is stated as being 6.5m, which is adequate for a local road. I don't know if the standards are country-wide, but the one I looked at (Lancashire CC) quoted 6.75m for a local distributor road and 6m for a transitional road. |
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All across the Great Western territory / The Wider Picture in the United Kingdom / Wrong sort of ice?
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on: March 24, 2014, 18:40:26
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From BBC» :- http://www.bbc.co.uk/news/uk-england-nottinghamshire-26711943<quote>All early morning tram services in Nottinghamshire were cancelled because ice had built up on overhead lines. Nottingham Express Transit (NET) said the trams could not run because the trams could not pick up power properly. Trams were reintroduced just before 08:00 GMT but there were still delays to services. Richard John Salter posted on BBC Radio Nottingham's Facebook page saying it was "unbelievable" for the service to fail due to the "first proper frost". Peter Miles said: "So like the too many leaves on railway lines, our wonderful trams cannot operate in the winter when the temperature drops to freezing?"</quote> |
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All across the Great Western territory / Across the West / Re: Weather disruption caused in 2014, and how to prevent it happening again - ongoing discussion
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on: March 14, 2014, 13:04:56
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I do wonder why the L pieces are shuttered along the landward edge. I supect that the seaward side is also shuttered as a scaffold walkway has been constructed for access. Are the narrow gaps to the sides and undersides to be filled with something? They seem rather small gaps for normal concrete to fill.
The shuttering has gone now, so perhaps they've used some sort of grout to fill the void between the 'L sections' and the base. I think it looked like they were all put in place on packing pieces to adjust for level? Yes, a considerable quantity of grout? was mixed using whisks on the end of electric drills. Lots of bags of the stuff were used. Whether there was any hardener added as per some sort of epoxy mix, who knows? I couldn't tell how it was applied, but guess it was poured through the hole in the centre and possibly the fixing holes of the L. |
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All across the Great Western territory / Across the West / Re: Weather disruption caused in 2014, and how to prevent it happening again - ongoing discussion
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on: March 12, 2014, 21:40:40
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The 'lobstervision' web cam is now (1530 on the 12th) showing significantly taller 'L-shaped' concrete sections being used to form the inboard boundary, so that would now suggest a similar solution to the seaward side - I'd presume they'll do something alongside it to restore the original view from the road and/or houses...
Are they actually L-shaped rather than flat? I can't see a shot that shows that, nor anyone doing any fixing (though that would almost certainly be hidden). I think in one of the pictures showing the second L piece being manoevered into to place you can just see the base. The first L was parked down at the far end for a while, which I assumed was left free standing, suggesting it was not a plain slab. In the meantime I have discovered some more pictures which answer nearly everthing:- http://www.rmweb.co.uk/community/index.php?/topic/81949-washout-at-dawlish/page-67 towards the bottom of the page, with more pictures on P68 which shows the height of the L pieces relative to the original wall. |
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All across the Great Western territory / Across the West / Re: Weather disruption caused in 2014, and how to prevent it happening again - ongoing discussion
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on: March 10, 2014, 11:20:13
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Interestingly they don't seem to be using the outer (sea side) pair of holes on the L shaped pieces. Structurally these are the better ones to use assuming most of the pressure comes from the sea. I wonder if they found the blocks too hard to drill? Probably very hard and with lots of reinforcing.
Which fixings do most to hold the L-sections depends on what load they are there to resist. If they are to hold the ballast and track, the inner ones are fine. So does that mean they are not meant to take loading from the sea side? And would fixing one to the top block really help, if it's not fixed to the one below? I suspect the holes fall close to the inner edge of the blocks, which would make drilling them a bad idea, rather than their being too hard. New concrete may be softer, but if you are using a cutting technique that's not likely to help (it might even make it trickier). The fixings are now being put in the row of holes nearest the sea. |
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