Sunday 9 February 2020

Too much work, too little time

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. 

Nigel investigates the inside of the chamber
(Photo: Dave)  
12" pipe heading from the field
(Photo: Dave)
First off is to try rods to see how long the pipe is
(Photo: Dave) 
The answer is, it's not very long
(Photo: Dave)  
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. 

GWR 1902 Map of the area around Winchcombe Cutting 
Dave and Nigel looking for the next missing chamber in a low spot 
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. 

Drain CCTV crew at work 
Outfall end of the 24" pipe in Winchcombe yard 
Second chamber located 75m along 

All the surface covers in the area were checked, they all turned out to be foul drains. 

Lifting the lid on the underworld
(Photo: Dave) 
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. 

Bridge 37, Gotherington , slip face 
Slip face 
More cracks in the slip 
Snout 

The sleeper found last week in the crack is now exposed as the slip has left the end behind 



Embedded wooden sleeper 
Slip face at the deepest point 

Last job for the day was to replace the heavy concrete lid on the end chamber. 

Dave and Nigel remove the safety fencing 
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.  

Haul road at Winchcombe down side 
Trees near the house in the middle distance line up the missing hedge 
Quick scrape in the ground uncovers bridge rail 

Round at Gretton, more supplies were brought in, a dumpy bag of sand for starters. 

Andrew and Micheal unload the sand supplies 
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.  

Culvert 30A up side headwall 
Culvert 30A up side headwall, possible rebuild 

At Far Stanley a down side toe drain chamber has been uncovered by the vegetation removal. 

Far Stanley up side embankment flailed clear 
Far Stanley toe drain chamber 
Far Stanley up side toe still wet 

By Bridge 29 the ground is still wet, even after a week without rain. 

Stanley Pontlarge, Bridge 29 down side 
Stanley Pontlarge, Bridge 29 down side 
Vegetation flail parked up 

It's strange what is found along the line, the Clearance gang have been stacking up items uncovered. 

Found property! 

Back at Culvert 24A Michael had covered the latest work. 

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. 

Greet Tunnel construction joint weeping 
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. 

Winchcombe Crest, bridge rail exposed on the new chamber 
Winchcombe crest, 24" outlet pipe 
Winchcombe crest, 24" inlet pipe 
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. 

Haul road back to the bridge 
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. 

Gretton Meadow turning point being prepared 
Micheal starts on the chamber 
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. 

Loading the spent ballast
(Photo: Dave) 
Dave unloading the spent ballast  
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. 

Culvert 24C outlet ditch silting up
(Photo: Dave) 
Removing the wet silt
(Photo: Dave) 
End scooped out for a silt trap 
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.  


Carefully does it 😊
(Photo: Dave) 
Dave working finished off with the shovel 

Bricklaying progress... 



Using metric bricks for the top courses 

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. 



Using the recovered coping blocks to weigh down sheets 
Good progress on the chamber today 
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.  







9 comments:

  1. You do have so much going on presently it must be very difficult to prioritize let alone plan for the summer projects?

    Regards

    Richard

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  2. Finding drains is one for Sherlock Holmes disciples!

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  3. History 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.

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  4. From Nigel Newling. Is there an e-mail address I can use?

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    Replies
    1. Hi Nigel, you can use lineside.drainage@gwsr.com to contact us.

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  5. Good to see more buried+lost infrastructure being discovered!
    Is 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

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    Replies
    1. 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

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    2. Thanks very much for satisfying my curiosity! I await news on the Gotherington work!

      Noel

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  6. Query as to why a dumpy bag gets bigger when refilled.

    This 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.

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