Monday 3 February
Contractors with the drain CCTV were in first thing to trace the 24" pipe that runs along the down side crest on Winchcombe cutting. That took out most of the morning, Dave and Nigel went further along the crest to uncover the newly discovered chamber and have a look inside to see where the second inlet pipe went. After all that excitement we popped down to Gotherington to measure the slip. After a late lunch we went back to Winchcombe cutting to replace the heavy concrete lid that was removed for the CCTV crew.
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Nigel investigates the inside of the chamber (Photo: Dave) |
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12" pipe heading from the field (Photo: Dave) |
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First off is to try rods to see how long the pipe is (Photo: Dave) |
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The answer is, it's not very long (Photo: Dave) |
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Bridge rail back in place (Photo: Dave) |
The GWR had miles of the old broad gauge bridge rail going scrap, it turns up in all sorts of guises, drain covers, lintels, fence posts... It is very good for identifying where fence lines have been encroached. In the case of drain covers it tends to corrode, with hidden chambers like the one found here it can be dangerous if the web gives away when anyone stands on it. It will be replaced with the pre-cast concrete lids as soon as we get anther batch of the 1200mm made. The bags of 40N mix and rebar are on order.
Looking at the 1902 map, we suspect that there is another chamber along here. The pattern being that they follow the former hedge lines, it looks like 3 of the 4 hedges have been grubbed out.
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GWR 1902 Map of the area around Winchcombe Cutting |
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Dave and Nigel looking for the next missing chamber in a low spot |
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They only found a 24" pipe collar, no chamber
(Photo: Dave) |
The CCTV crew started on the Winchcombe end chamber working back under the road. A chamber was discovered 73m along the run, this puts it in the Station House garden. The next section videoed was up from the outfall.
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Drain CCTV crew at work |
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Outfall end of the 24" pipe in Winchcombe yard |
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Second chamber located 75m along |
All the surface covers in the area were checked, they all turned out to be foul drains.
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Lifting the lid on the underworld (Photo: Dave) |
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Nigel clearing the lifting holes in the lid (Photo: Dave) |
Down at Bridge 37 at Gotherington, the slip has get a bit worse, the face is now 2.7m at the deepest point.
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Bridge 37, Gotherington , slip face |
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Slip face |
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More cracks in the slip |
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Snout |
The sleeper found last week in the crack is now exposed as the slip has left the end behind
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Embedded wooden sleeper |
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Slip face at the deepest point |
Last job for the day was to replace the heavy concrete lid on the end chamber.
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Dave and Nigel remove the safety fencing |
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The heavy lid will be replaced as it's not certain there is any reinforcing in it |
Thursday 6 February
Round to Gretton today to measure up for the works on Culvert 24A, B and C. Micheal manged to get a course of bricks onto Culvert 24A crest chamber. The haul road is going in at Winchcombe cutting ready for removal of the failed earth from the up side slip. The missing chamber was located, Micheal spotted that 2 trees in the distance and lined up and we found it from them.
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Haul road at Winchcombe down side |
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Trees near the house in the middle distance line up the missing hedge |
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Quick scrape in the ground uncovers bridge rail |
Round at Gretton, more supplies were brought in, a dumpy bag of sand for starters.
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Andrew and Micheal unload the sand supplies |
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The great mystery, why does a shovelled out bag always fill more than 1 bag |
While Micheal did the bricklaying there was time to assess the damage to the headwall on Culvert 30A up side. The ground is so soft that when the vegetation flail was run past it squashed the headwall over.
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Culvert 30A up side headwall |
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Culvert 30A up side headwall, possible rebuild |
At Far Stanley a down side toe drain chamber has been uncovered by the vegetation removal.
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Far Stanley up side embankment flailed clear |
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Far Stanley toe drain chamber |
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Far Stanley up side toe still wet |
By Bridge 29 the ground is still wet, even after a week without rain.
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Stanley Pontlarge, Bridge 29 down side |
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Stanley Pontlarge, Bridge 29 down side |
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Vegetation flail parked up |
It's strange what is found along the line, the Clearance gang have been stacking up items uncovered.
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Found property! |
Back at Culvert 24A Michael had covered the latest work.
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Culvert 24A crest chamber |
Before leaving there was time for a quick look at the tunnel, water is running in through the construction joints. Given the amount of rain over the last 3 months it is only to be expected.
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Greet Tunnel construction joint weeping |
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Clear sky looking out of the tunnel |
Saturday 8 February
Work starting in earnest on the Culvert 24A refurbishment, on the way out there there was time to scrape off the last of the chambers (hopefully) on Winchcombe cutting crest. It follows the pattern with a pipe running in under the fence. This one will probably be the same as the previous with just a stub pipe.
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Winchcombe Crest, bridge rail exposed on the new chamber |
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Winchcombe crest, 24" outlet pipe |
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Winchcombe crest, 24" inlet pipe |
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Winchcombe crest, 12" pipe from the field |
The Winchcombe cutting haul road looks to be almost complete, the recently excavated ditch has been sacrificed to make the road.
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Haul road back to the bridge |
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New haul road down the down side cutting slope |
Round at Gretton, Micheal was back on bricklaying with Dave on the mixer. Stuart set about extending the turning point and general site preparation.
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Gretton Meadow turning point being prepared |
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Micheal starts on the chamber |
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Dave cleans the the mixer between batches |
The spent ballast for the turning point was sourced from the excess down at the up side end of Culvert 24C. Loading was simple, getting back off was a bit harder work.
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Loading the spent ballast (Photo: Dave) |
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Dave unloading the spent ballast |
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Dave takes another load up the haul road |
While in the area a couple of scoops of silt were removed from the outlet of Culvert 24C, this will hopefully help to keep it free from blocking until we can remodel the outlet.
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Culvert 24C outlet ditch silting up (Photo: Dave) |
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Removing the wet silt (Photo: Dave) |
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End scooped out for a silt trap |
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Grip dug to drain the wet area near Culvert 24C up side |
After unloading the truck twice by hand, assistance was brought in for the third load. We are investigating the possibility of acquiring a tipper for moving bulk loads, a dumper would be restricted to site work and contracting in is a bit expensive.
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Carefully does it 😊 (Photo: Dave) |
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Dave working finished off with the shovel |
Bricklaying progress...
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Using metric bricks for the top courses |
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Dave clearing round the chambers in spare minute |
Storm Ciara is due to blow in on Sunday, so everything has to be battened down in case it blows away.
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Using the recovered coping blocks to weigh down sheets |
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Good progress on the chamber today |
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Clouds moving in as we pack up for the day |
Our sharp eyed readers will have noticed that Alastair has been away since Christmas, his health has taken a bit of a knock but hopefully he is now on the road to recovery. We all wish him well and are saving some jobs for when he gets back.
You do have so much going on presently it must be very difficult to prioritize let alone plan for the summer projects?
ReplyDeleteRegards
Richard
Finding drains is one for Sherlock Holmes disciples!
ReplyDeleteHistory repeats itself. The drainage in this area was completely re-engineered in 1949 with access for machinery built into the downside cutting side. I will try to PM a few photographs.
ReplyDeleteFrom Nigel Newling. Is there an e-mail address I can use?
ReplyDeleteHi Nigel, you can use lineside.drainage@gwsr.com to contact us.
DeleteGood to see more buried+lost infrastructure being discovered!
ReplyDeleteIs there a pipe connecting the chambers along Winchcombe cutting where you found the new chamber? If so, is it possible to run a camera along it to look for unknown chambers? (You'd also be able to check the condition of the pipe, of course.)
The slip at Gotherington is looking really ugly. I'd be very worried about running a train along there with that now-unsupported vertical face so close to the line! It might just create an even-bigger mess...
Thanks for all the time+energy put into creating this lengthy update; much appreciated!
Noel
There's a 24" pipe all the way along the cutting crest, it was flowing well today and that points to a reasonable condition. Work is starting at Gotherington, the site preparation is already underway. Stuart
DeleteThanks very much for satisfying my curiosity! I await news on the Gotherington work!
DeleteNoel
Query as to why a dumpy bag gets bigger when refilled.
ReplyDeleteThis is a known thing.
When doing estimates for quantities I used to have to add in the "Bulking Factor"(I seem to recall 0.8 was the figure used) onto all volumes when digging as the material being removed was uncompacted.