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Woking - Basingstoke (near Hook) landslip (15/01/23)

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Signal Head

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Have there been any recent updates to the expected timescales for the repair?
Someone must have been getting a lot of overtime in, as I believe the Down Slow is being reinstated this weekend. Fast lines then both OOU until the following weekend, when the temporary slew is undone, after which I presume it's 'NWR'.
 
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swt_passenger

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Someone must have been getting a lot of overtime in, as I believe the Down Slow is being reinstated this weekend. Fast lines then both OOU until the following weekend, when the temporary slew is undone, after which I presume it's 'NWR'.
That’s making good progress then, and thanks for the update.
 

45669

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Someone must have been getting a lot of overtime in, as I believe the Down Slow is being reinstated this weekend. Fast lines then both OOU until the following weekend, when the temporary slew is undone, after which I presume it's 'NWR'.

They've said from the outset that it should be finished by the end of Wednesday the 22nd, so if your information is correct they'll be finishing three days early.
 

Freightmaster

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Headcorn - Ashford was used yesterday due to a broken rail.
Winchester to Micheldever was also utilised for a couple of hours yesterday morning
due to the failure of a Freightliner on the 'up' line at the latter.




MARK
 

Signal Head

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They've said from the outset that it should be finished by the end of Wednesday the 22nd, so if your information is correct they'll be finishing three days early.
The figure of seven or eight weeks was being bandied about before the slew was put in.
 

fgwrich

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Someone must have been getting a lot of overtime in, as I believe the Down Slow is being reinstated this weekend. Fast lines then both OOU until the following weekend, when the temporary slew is undone, after which I presume it's 'NWR'.

Spot on, I was speaking to a team-mate of mine the other day and although he said it's tight, that is certainly the plan. Impressive work from the NR teams, though I have no doubt work will continue to stabilise the embankment for several more months to come with a speed restriction on the slow.
 

zwk500

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swt_passenger

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Video update showing the situation as of this morning Sunday 19th.

For anyone who cannot see the linked video it shows both up and down slow lines in use by through services, a number of road rail machines parked on the up fast, and the down fast is still in the process of reinstatement:

 
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Meerkat

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Do NR have kits of stuff ready for this kind of event, or call off contracts on the lines of 'you will provide us with 2,000m of trackway/9,000 tonnes of stone/relevant machinery at X days notice'?
Its getting fixed remarkably quickly, and with the age of the infrastructure and a harsher climate this is going to keep happening around the country.
 

zwk500

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Do NR have kits of stuff ready for this kind of event, or call off contracts on the lines of 'you will provide us with 2,000m of trackway/9,000 tonnes of stone/relevant machinery at X days notice'?
Its getting fixed remarkably quickly, and with the age of the infrastructure and a harsher climate this is going to keep happening around the country.
NR has stockpiles at strategic locations, so they can conduct emergency repairs on this and then have enough lead time to replenish the stockpile before major works.
 

The Ham

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Video update showing the situation as of this morning Sunday 19th.

For anyone who cannot see the linked video it shows both up and down slow lines in use by through services, a number of road rail machines parked on the up fast, and the down fast is still in the process of reinstatement:


Was there a second slip (west of the site compound) or was that area something they improved because of something they identified on site?
 

zwk500

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Was there a second slip (west of the site compound) or was that area something they improved because of something they identified on site?
That smaller area looks like a temporary/emergency Vehicle access to the lineside for the RRVs.
 

swt_passenger

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Was there a second slip (west of the site compound) or was that area something they improved because of something they identified on site?
I‘m not sure about that at all, I‘ve seen a few videos now but it was never clear what happened in that area. Perhaps some material might have been delivered by side tipping?
 

The Ham

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That smaller area looks like a temporary/emergency Vehicle access to the lineside for the RRVs.

Wouldn't they have joined from Hook station car park where there's level access to the track from a set of gates? Obviously that's going to be limited when trains are running.
 

zwk500

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Wouldn't they have joined from Hook station car park where there's level access to the track from a set of gates? Obviously that's going to be limited when trains are running.
They would want the access to be close to the site compound. You can clearly see tyre tracks on the smaller area that indicate it was used to access the line from the haul road.
 

Snow1964

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Video update showing the situation as of this morning Sunday 19th.

For anyone who cannot see the linked video it shows both up and down slow lines in use by through services, a number of road rail machines parked on the up fast, and the down fast is still in the process of reinstatement:


Looks like the fast lines are almost back in position (slews removed), but haven't yet got conductor rails.
 

Bald Rick

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or call off contracts on the lines of 'you will provide us with 2,000m of trackway/9,000 tonnes of stone/relevant machinery at X days notice'?

Call off contracts, with Pre agreed unit rates, for any job of any size.

Anout 20 years ago there was some work done to see how much more expensive these ‘emergency’ earthworks were to deliver than all the planned work. Turns out it’s was about 10% cheaper!
 

Meerkat

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Call off contracts, with Pre agreed unit rates, for any job of any size.

Anout 20 years ago there was some work done to see how much more expensive these ‘emergency’ earthworks were to deliver than all the planned work. Turns out it’s was about 10% cheaper!
That figures - I believe loads of the emergency weapons/planes developments for the Falklands turned out much cheaper than normal.
You don’t have to pay people to spend ages deciding whether you should do it at all and what priority it will be for a start!
 

LAX54

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Spot on, I was speaking to a team-mate of mine the other day and although he said it's tight, that is certainly the plan. Impressive work from the NR teams, though I have no doubt work will continue to stabilise the embankment for several more months to come with a speed restriction on the slow.
When there is an incident, NR always seem top notch in getting things back to normal quickly, I dont think there is another Company that could compete, but when such things are planned............. not always so good !
 

QueensCurve

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I will say that one of the few places where bidi might pay, at the time if the next resignalling, is Preston - Carstairs.
Even if it were only on Beattock Bank where freight trains sit down all to often.
Headcorn - Ashford was used yesterday due to a broken rail.
Headcorn. A beautiful airfield with sheepses on the runway.
 

swt_passenger

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Another video was uploaded to YouTube yesterday, it seems to indicate the area being repaired is being extended quite some distance either side of the main failure area, which was alongside where the steel piles have been installed. Just beyond the new work heading in the London direction there’s a section with a sort of flat “terraced” area about half way up the slope?

(Video shows fairly significant work continuing on the slopes, but the railway work itself appears complete.)

 

Sultan

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It's much closer to houses than I realised. Was much (noisy) work done overnight?
 

DelW

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Another video was uploaded to YouTube yesterday, it seems to indicate the area being repaired is being extended quite some distance either side of the main failure area, which was alongside where the steel piles have been installed. Just beyond the new work heading in the London direction there’s a section with a sort of flat “terraced” area about half way up the slope?
AKA a berm, which adds weight above the toe of the embankment so improving the factor of safety against a rotational slip failure.

It's likely that stability analyses will have been done for lengths either side of the original failure. If the FoS's were low (bearing in mind embankment stability still isn't an exact science), then it makes sense to do some additional stabilisation work while the resources are still on site.
 

Deepgreen

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AKA a berm, which adds weight above the toe of the embankment so improving the factor of safety against a rotational slip failure.

It's likely that stability analyses will have been done for lengths either side of the original failure. If the FoS's were low (bearing in mind embankment stability still isn't an exact science), then it makes sense to do some additional stabilisation work while the resources are still on site.
Looking at the video, I imagine the areas either side are at far lower risk, having far less height from the base and being vegetated (with the binding benefit of root systems).
 

Meerkat

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Looking at the video, I imagine the areas either side are at far lower risk, having far less height from the base and being vegetated (with the binding benefit of root systems).
How vegetated? If it’s trees they can be a problem, particularly if it’s clay AIUI.
 

AM9

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That figures - I believe loads of the emergency weapons/planes developments for the Falklands turned out much cheaper than normal.
You don’t have to pay people to spend ages deciding whether you should do it at all and what priority it will be for a start!
OT, but that was made easier (and cheaper) by locking some of the QA organisations away for the duration. Different imperatives rule in such times.
 
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