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Strengthening of Staverton Railway Bridge

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Progress Report: Week 1 ending 12th March 2007

Weather

First half of the week wet, second half dry.

Meetings & Site Instructions

Frequent site meetings have been held to monitor progress.

Two site instructions have been issued:-

1. To provide additional signage for the pub reading "Pedestrian access available to the Old Bear Pub"

2. To provide 10m of Heras fencing across the driveway of the "Kings Arms" public house.

Summary of progress

The site has been established.
The pedestrian and vehicular diversions have been implemented.
All known services have been exposed clearly and the routes traced.
All previously unknown services have been traced, exposed and identified.
The timber screens have been erected on the bridge parapets.
The safety fencing has been erected on the trackside.

Planned works for week ahead

Excavation for phase one of the works, consisting of a 1.9m wide trench across the centre of the arch will take place.

Other programming items or issues

Due to locating an unexpected utility service the works were suspended for Saturday 10^th and Sunday 11^th March pending approvals of the revised method of working by Network Rail.
The first concrete pour is anticipated to take place late Friday/Saturday.

View of the railway bridge

Progress Report: for Week 2 ending 18th March 2007

Weather

Mainly dry and bright for the week.

Meetings & Site Instructions

Frequent site meetings to monitor progress.

Site instruction Number three issued

1. Amendment to back of wall drainage and adjustment to concrete backfill design to suit arch profile

Summary of progress

Revised method statement approved by Network Rail
Majority of phase one of the works completed, consisting of a 1.9m wide trench excavated across the centre of the arch. The excavation was filled with concrete on Saturday morning (17^th March).

Planned works for week ahead

Waterproofing, drainage and backfilling for phase one of the works to be completed.
Excavation for phase two of the works, consisting of a trench excavated between the phase one trench and the “Trowbridge” side parapet.
Concrete pour is anticipated for late Friday.

Other programming items or issues

The contractor is due to issue a revised programme of works in the near future. This will indicate an anticipated completion date which will be circulated.

Progress Report: for Week 3 ending 26th March 2007

Weather

Cold, mainly dry and bright for the week.

Meetings & Site Instructions

Frequent site meetings were held to monitor progress.

Site instruction: The contractor was asked to amend a sign on the diversion route.

Summary of progress

The excavation for phase two of the works has taken place.
The concreting for phase two of the works took place early Saturday morning.
The excavation has taken place for the buried/substructure drainage.

Planned works for week ahead

The waterproofing, drainage and backfilling for phase two of the works will take place.
The headwalls to the West for the buried/substructure drainage will be constructed.
The carriageway surfacing will be laid.

Other programming items or issues

None

Progress Report: for Week 4 ending 1st April 2007

Weather

Dry and bright.

Meetings & Site Instructions

Frequent site meetings to monitor progress.

No site instructions issued.

Summary of progress

The waterproofing, drainage and backfilling for phase two of the works was completed.
The headwalls for the west drainage were constructed.
The west embankments were locally re-profiled.
The kerbing was undertaken to the west of the structure.
The water main was repositioned within the structure.
The hardened verge was constructed.

Planned works for week ahead

The carriageway will be re-surfaced.
The temporary fencing will be erected.
The site will be tidied and made good.

Other programming items or issues

The road will be fully re-opened on Wednesday 4^th April; a further closure is programmed to commence in early May for 3 weeks, this will allow the gas main diversion to be undertaken and complete the final phase of the works.
Balfour Beatty (main contractor) together with Prima Services (provider of rail safety staff) ran an Easter Egg competition with the children of the local Primary School. The children were asked to draw a picture showing the work taking place and describe why they should not play on construction sites. Prizes of Easter Eggs were handed to the winners on Thursday by Site Engineer Andrew Richardson.

New high containment kerbs on the approach to the structure from the Trowbridge side.

Progress Report: for Week ending 29th April 2007

Weather

First half of the week, dry with some showers, second half dry and fine.

Meetings & Site Instructions

Frequent site meetings were held and two site instructions were issued:

SI 11: a request to amend the temporary signs.
SI 12: an instruction to ensure that the temporary traffic signals were manually operated at peak times.

Summary of progress

The site has been re-established.
The traffic management has been re-established.
The water main in the west verge has been tested by Wessex Water.
The hoarding to the parapets has been erected.
The excavation for the gas main has been completed.
The gas main was diverted on the 27^th April 2007.
The road was re-opened under traffic lights on the afternoon of the 28^th April 2007.
The footway and carriageway excavations have commenced.

Planned works for week ahead

The excavation will commence; (please note due to the area containing several services it will be necessary for this to be hand dug in order to protect them).

Other programming items or issues

As stated in previous consultations, work will continue until the 24^th May. The highway will remain open with temporary signals at the bridge, except for the following dates when a road closure will be in place 9^th May, 11^th May and the 22^nd – 24^th May 2007.

View of the railway bridge looking south

Progress Report: for Week 6 ending 4th May 2007

Weather

Generally dry and fine

Meetings & Site Instructions

Frequent site meetings to monitor progress.

Summary of progress

The highway re-opened under temporary traffic signals on Saturday 28^th April 2007.
The eastern footway excavations have been completed.
The permanent diversion of the Wales & West Utilities Gas main has been completed.
The re-testing and chlorination of the Wessex Water main in the western verge was undertaken.
The initial concrete pours for the in-situ concrete backfill to the masonry arch bridge have been completed.

Planned works for week ahead

The in-situ concrete backfill to the masonry arch bridge will be completed.
The installation of the steel palisade fencing to the railway boundary along the west of the site will commence.
The waterproofing and drainage works to the in-situ concrete backfill will begin.
Backfilling with type 6N granular material behind the strengthened arch will be completed.

Other programming items or issues

Good progress has been made with the excavation works and construction is currently running slightly ahead of the revised programme.
As previously indicated, it is anticipated that work will continue until the 24^th May. The highway will remain open with temporary signals at the bridge, except for the following dates when a road closure will be in place 9^th May, 11^th May (10.00 am to 4.00pm) and the 22^nd – 24^th May.

View of the traffic management looking south

Excavation of material to allow for the in-situ concrete backfill

Progress Report: for Week 7ending 14th May 2007

Weather

Generally dry, wet weather during Friday and the weekend.

Meetings & Site Instructions

Frequent site meetings were held to monitor progress.

Summary of progress

The final pour for the in-situ concrete backfill over the masonry arch bridge has taken place.
The installation of the steel palisade fencing to the railway boundary along the west and east sides of the site has commenced.
The waterproofing and drainage works to the in-situ concrete backfill were completed.
The construction of the headwalls to the east of the site commenced.

Planned works for week ahead

To complete the installation of the steel palisade fencing to the railway boundary along the west and east sides of the site.
To commence the construction of the headwalls to the east of the site.
To lay the kerbs.
To deposit the fill into the eastern footway.
To re-connection the Wessex Water main in the eastern footway.
To remove the temporary concrete barrier.
To complete the re-surfacing works.
To reinstate the highway road markings over the structure.

Other programming items or issues

The excavation works took less time than anticipated so the construction is currently running ahead of the revised programme. This has allowed for the planned completion date of the works to be moved forward by 3 days.
The highway will remain open under traffic lights until early Saturday morning when the road will re-close for 3 days to allow for the removal of the concrete barrier, the resurfacing works and the reinstatement of the road markings. This closure is now scheduled to take place from Saturday the 19^th to Monday the 21^st May.
The road will be re-opened to traffic on the 21^st May. (Exact time unknown – depending on progress of the work).

View on site looking north showing waterproofing, services and pedestrian route