As remarked on in previous posts, we
frequently have to adjust our planned work schedule to take account
of changing circumstances. Sometimes this is because of urgent requests
to deal with unexpected situations, sometimes due to availability of
the team members or the plant, and sometimes due to the weather. The
focus on the repair of the up side of culvert 7A came under the
weather category. This year’s dry spring and summer has led to
several streams drying out completely, and many more having a much
reduced flow. 7A was one of these, during ‘normal’ times the flow
of water here would preclude work without diverting the inbound
channel or using a very large pump. Hence the desire to complete the
repair before the autumn wet season came in earnest. We would have
liked to include a few more of the ‘only possible in dry periods’
jobs – but with only a small team working one day a week time is
against us. If you would like to help strengthen the team so that we
can keep the drainage system fully functioning and thus the track bed
dry and stable, please get in touch. In the the first instance,
please contact the Estates Management HoD or the Railway Recruitment
Office; alternatively email draingangGWSR@gmail.com.
Thursday 20th October
A small team returned to culvert 7A
at Stanton with the special ingredient to effect the repair to the
leaking up side headwall. This was a special quick hardening
‘underwater’ cement. For some reason our expert bricklayer calls
this fondue! It has to be mixed in small quantities and applied
rapidly; it certainly is very quick to harden. Whilst waiting for the
pump to reduce the water level sufficiently in the outlet, repairs to
the dry top course and copings of the headwall were made. The corner
coping stones were patched – as we were not able to find
replacement ones with the same geometry and size.
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Completed repair to low mileage end of up side 7A headwall. On the wet side, level sufficiently low to allow Martin to climb down. (Photo by Dave)
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Rapid drying cement under the pipe on the exit. (Photo by Dave)
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Dry side void filled with concrete - normal cement mix. (Photo by Dave)
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Finally, several loads of concrete
(using standard cement) were mixed and used to fill the void on the
track side of the headwall which the leaking water had created.
Another odd job, for the plant
operator, was some maintenance on the dumper. This included
fashioning a cover for the drivers seat; so that it should stay dry
when we have to park it outside in the winter.
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Dumper maintenance (Photo by Jonathan)
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Thursday 27th October
For the first time in several weeks
we had full attendance with all 7 of the team working. So we split
into two groups.
One group of 3 spent the morning at
culvert 7A, just north of B4632 Stanton Road bridge. They checked on
the work of last week. This has been successful, there was no sign of
leakage into the up cess. Water level was above the silt in the
outlet ditch; so some flowing away. They pumped the pit dry; then
used more of the fondue (rapid setting cement) to complete the
repairs to the pointing. They also made a fence to cover the hole in
the hedge were the digger came in two weeks ago.
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7A up side exit chamber; holding water high enough for flow out into the exit ditch. No leakage to the cess! (Photo by Roger)
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The second group of four resumed the
internal visual inspection programme; starting at Toddington and
working south. Three structures completed, being cross drain 14A,
culvert 14B and culvert 15A. 14A inlet on the down side is the pipe
and then ditch from behind Toddington signal box. The ditch is
overgrown again, it was completely clear back in February after the
work of the clearance teams. 14A has an overflow, as the pipe under
the track (and then the narrow gauge line) is only of small diameter,
during wet periods there is a flow at the foot of the down side
embankment south to culvert 14B. This was still dry. 14B is the
culvert where the upside outlet under the adjoining property is too
high; so there is quite a deep pond. This was full of a watercress
like weed, which was cleared, so the level in the pond dropped
several inches. Finally at 15A on the down (inlet side); the
displaced concrete slabs which form the low mileage side were reset -
so all are upright now.
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14A inlet on down side is an unusual tall chamber in a ditch. Requires the long handle grab to clear out - guess what we forgot to load today! |
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One year's growth in the outlet pond of 14B - before clearing....
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... and after clearing. Note reduction in water level!
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A three man lift team after resetting the slabs on the inlet (down side) of 15A.
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A final task for the combined teams
was in connection with the milepost project, the first activity for a
number of months. Milepost 10 at Didbrook was at an angle and with
one face missing. So this was completely removed – a four man lift
job as bridge rail is heavy. Its replacement, a new head and a
refurbished length of bridge rail is waiting in the workshop.
Sunday 30th October
The annual team day out at the Mixed
Traffic Gala. All seven of the team were present. With the disruption
to the timetable caused by loco failure (class 20) and signalling
problems (at Gotherington) we spent most of the day riding in the FO
‘Mary’. By luck, we also rode on one of the workings with the
Hall and the Manor at one end and the Deltic at the other – real
super-power. We spent an interesting hour in the loco sheds at
Toddington, chatting to our Steam and Diesel Loco colleagues. Finally
we repaired to the Pheasant for a hearty meal. Very good value that
was too – one course was sufficient without a preceding day of
manual work!
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Unrecognisable wearing 'civis'; 5 of the team at Toddington. Left to right: Jonathan, Martin, Dave, Nigel, Roger.
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Deltic 55019 from the footbridge at Broadway.
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Dinmore Manor and Foremarke Hall on the other end of the train.
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Thursday 3rd November
A significant day for three reasons.
First it was a team member's birthday; second we replaced milepost 10
and third we got the flail back into action after nearly two years waiting for a replacement throttle cable..
Again full team attendance. In the
morning we split into two teams. First team of three tackled removal
of silt from the inlet chamber (down side) of culvert 14A at
Toddington. This was left over from the previous week, as it required
the long handled grab. With the rain in the last week; the overflow
from 14A to 14B down the toe ditch on the down side is now flowing.
The team then moved on to erect the new milepost 10; a head on a
refurbished length of bridge rail secured by two bags on postcrete.
Then on to milepost 10 & quarter (by Didbrook No2 bridge) to
remove the old damaged head and to paint the bridge rail. This length
of bridge rail will be retained in-situ.
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Just like new - MP10 at Didbrook. (Photo by Roger)
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The second team of four undertook
visual internal inspection of cross drains 16A, 16B and culvert 16C.
Significant clearance on the area on the down side at 16A was
undertaken; as there are three chambers here and a pipe run that goes
along the boundary hedge to the road under Didbrook No2 bridge. There
are breaks in this pipe which need fixing; one of which we will make
into another inspection chamber. This repair is yet another that
requires a spell of drier weather.
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Broken section of pipe on down side - part of the 16A complex.
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Inside the outlet chamber (up side) of 16A; all in good condition.
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One of the smallest headwalls on the railway - 16B down side.
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A job for our bricklayer, two courses of 16C low mileage down side wing wall need replacing.
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Also having got the Efco flail
working, we used this to clear vegetation alongside the former up
track bed most of the way from 16A to south of bridge 17A (on the
Winchcombe side of Hayles Abbey Halt). For most of this it was two
passes, but on a level spot more we cut more width to create a new
safe spot to enable vehicles to be parked the requisite 12ft distance
from the running rail. The flail deals with most vegetation; apart
from brambles. We found the best policy was to remove most brambles
and any saplings with a hedge cutter first.
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The Efco flail back in action. Great on level ground as long as the waist high brambles are removed first.
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This was the first day this autumn we
were working with no passenger trains running. However, we did have
an ECS move and a light engine move to keep us on our toes!
In the afternoon the combined teams
cleared vegetation around bridge 17A, this is the major culvert just
south of Hayles Abbey Halt. As this is a large structure it is
professionally inspected, so we do not perform a visual inspection,
but annual vegetation clearance is vital.
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The large bore of 17A - this is why this is a bridge not a culvert.
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Thursday 10th November
Only four of us attending today; and
an urgent request from the Structures Manager. So a reschedule on
two counts.
The urgent request was to unblock
culvert 24C at Gretton. This is on the low mileage side of Working
Lane. The external examiners undertaking the detailed examination had
found an obstruction about 3m (or 9 feet in old money) in from the
outlet end on the up side. As this is approximately where the bore
was extended to run under the haul road, we guessed what the cause
would be.
Sure enough, the blockage was
branches, twigs and leaves then a build up of silt at the join
between the old brick invert and the slightly smaller diameter
plastic pipe that forms the extension. A good illustration of why
extending bores with smaller diameter pipe is best avoided.
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The blockage - taken from a CCTV image during the inspection by Inspire Structures Ltd.
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Three of the team spent all morning
with the two sets of drain rods we have; slowly removing the
blockage. One of the dampest and muckiest jobs we have tacked for a
long time! After unblocking we carried on adding rods; but ran out
of rods before the head reached the other end (down side). However we
knew the bore was clear, as we could see torches from each end. Plus
the water was flowing clear.
VIDEO - Rodding in action. Dave providing the muscle power; Jonathan providing the lighting.
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Blockage cleared. View from up side (outlet), with the first of nearly 30 drain rods in place that still did not reach the other end. That length of rodding is heavy!
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View in from the down (inlet) side - the camera has not picked up the pin point of torch light we could see from the other end.
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Almost all of our larger red set of rods in use.
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The fourth member of the team (plant
operator and now chief flail driver) used the flail to mow the haul
road vegetation from near 24C up to the top opposite the Royal Oak
pub. He also discovered a patio umbrella from the pub which had blown
onto the lineside. This was returned.
In the afternoon, all four undertook
the internal visual inspection of culvert 24B. On the up side this
included clearance of growth and silt from the spillway between the
railway and haul road bores. The difference between the up and down
sides here is very apparent. The up side structures are all in tip
top condition, they were rebuilt in 2017 and 2021. Whereas on the
down side, the headwall needs some major work; probably the first
since the old GWR days. Hopefully we will have an external contractor
attending to this early next year when the line south of Winchcombe
is closed for bridge and PW work at various locations.
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24B up side (outlet), built 2017 in fine condition.
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24B down side (inlet), built approx 1902 now needing attention.
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