A4130 Manor Railway Bridge, Didcot
The works were to replace the bridge deck waterproofing and bridge expansion joints under the carriageway and part way into the verges. This road bridge lies on the A4130, a major thoroughfare into Didcot, traversing the main Oxford to Paddington railway line.
The bridge deck waterproofing and bridge expansion joints under the carriageway and part way into the verges were replaced. To facilitate this, the kerbs across the bridge were re-laid and the carriageway re-surfaced.
A Milling machine with conveyor belt loaded directly into a wagon. This was positioned away from the bridge parapets to ensure that any debris coming off the conveyor was not directed near the parapets and potentially fall onto the railway below. As an extra precaution the Heras fencing running along both parapets had debris netting attached.
It was anticipated that the existing waterproofing would be removed by scraping it off with the bucket of a 360º excavator with a level edged plate welded onto the bucket.
Any residual material that could not be removed by this method was removed by grit blasting. Prior to grit blasting the area was fully enclosed with 2.0M high Heras fencing with debris netting fix to the fencing. Timbers were positioned spanning between the top of the Heras fence panels and netting fixed to this to ‘cocoon’ the area.
Existing deck expansion joints were broken out using a compressor and jack hammers. Works were continuously monitored to ensure that no materials fell through the expansion joint onto the bearing shelf.
Deck waterproofing, installation of the new expansion joints and surfacing were undertaken by a specialist sub-contractors with a Fergal Site Foreman in permanent attendance.
Refurbishment of City Centre Foot Bridge
The works will comprise of removal and replacement of existing drainage channels, re-water proofing to the original decks, repairs to existing granite cladding, removal of the old lighting units, remedial work to the existing expansion/ movement joints, renewal of wearing courses to the footbridges.
Pye Bridge, Kidlington
Construction of 4000m² spine road, foul and storm-water drainage including microbore beneath British Rail’s main Oxford to Birmingham line. 14,000m³ landscape bund, skewed 33m clear span road bridge over the Oxford Canal.
65T edge beams, reinforced earth abutments, brickwork cladding to the whole structure.
Frenchay Bridge, Berkeley Homes
Two road bridges were constructed over the Oxford Canal, one being a single 20m span structure, brick clad, the larger project being built on a skew and to a horizontal and vertical radius, again, this was brick clad.
Joscas Preparatory School with MJA Consulting
Construction of 6 No foundations for steel footbridge at Joscas School to span the A415 and link the school to the playing fields.
Aeration Scheme, Worcester College
Manufacture and installation of timber pedestrian footbridge on piled abutments over a backwater stream leading to a lake in the grounds of Worcester College together with feature dam and aeration system to backwater. Installation of new river banks.
Swinford Toll Bridge
Road reconstruction to privately owned, listed toll bridge over the River Thames.
Further phase awarded comprising of surfacing works and refurbishment of Toll Booth via Gifford and Partners.
Henley Bridge, Oxfordshire
The work involved stonework repairs to Henley Bridge, a Grade I listed structure five span arch bridge over the River Thames.
A404 Queen Victoria Bridge, High Wycombe
Replacement of the steel edge beams with reinforced concrete plinths. This required the reconstruction of the brickwork pilasters. The cast iron fascia plates were reconditioned and reused as a facing to the plinths.
The cast iron parapets were reconditioned and modified to allow fixing to the top of the new plinths. The part of the bridge supporting the western verge was strengthened with new steel beams and concrete infill placed under the existing bridge soffit.
Bodicote Turn Flyover
Works include replacement of both parapets on a single 21.5m span simply supported road bridge. Existing parapet plinth to be increased in width. Waterproofing and expansion joints to be replaced. Repairs to strike damage on soffits. Parapet replacement scheme
Barns Road Bridge, Oxford
Strengthening and waterproofing scheme to main road bridge.
Hildesheim Viaduct, Weston Super Mare
Hildesheim Bridges (North and South) comprise twinned five span post-tensioned, glued segmental box structures that carry the A370 over the Weston-Super-Mare Railway Loop. The bridges have an overall span of 155.1m and carry a dual carriageway with an overall width of 23.1m and a permanent speed restriction of 30mph.
The eastern expansion joint, a Waboflex SR6.5A Reinforced Elastomeric (HA Type 5) required replacement with a suitable expansion joint of similar performance level either HA Type 5 or 6 installed with a secondary membrane.
Works included the implementation of a full road closure of the A370 Hildesheim Bridge and the setting up of an alternative route and the removal of the existing Waboflex Expansion Joint in sections and replacement with new. The works were undertaken at night time between 21:00 hours and 06:00 hours.
Marsh Lane Flyover, Oxford
The bridge spanning the Oxford Ring Road, A40 Dual Carriageway, is the primary route to the John Radcliffe Hospital.
Traffic flows were maintained over and under the bridge whilst the edge beams and parapets were replaced, bridge deck waterproofed, and footways and carriageways reconstructed.
A project involving the replacement of timber fenders which protect pairs of cast iron columns at the main navigation channels of the Cookham Bridge over the Thames.
Works involved the removal of decayed timber piles which were cut off below water level and their replacement with new timber piles. This element of the work was undertaken by a four man dive team. During the works a partial river closure was in force.
Ford Bridge Reconstruction
The works comprised complete reconstruction of the existing reinforced concrete bridge deck with in-situ reinforced concrete. The existing bridge is approximately 90m long by 2.7m wide and consists of an in-situ reinforced concrete slab deck supported on concrete abutments. These works included waterproofing, kerbs, surfacing, metal bridge parapets/pedestrian railings. During the reconstruction works, a complete road closure with an approved diversion route was provided with traffic management to Chapter 8, minimum. Pedestrian movements also required management.
The bridge is built over the River Misbourne and carries the MC14 High Street at its’ upstream end.
Further downstream, the bridge passes under a shopping parade/car park and service road.
Carterton Foot Bridge, Refurbishments
The scheme involves re-painting existing steel footbridge and applying waterproof slip resistant surfacing to the deck.
The main items of work were:-
- Set up road closure and traffic diversion route - Set up temporary pedestrian crossing
- Erection of temporary protective working scaffolding with shrink wrap cladding
- Grit blasting metalwork to remove existing paint system - Apply 3 coat paint protective system
- Apply resin based anti-slip waterproof system to deck - Replace all bolts to bolted joint
- Minor welding works to cleats
The bridge was totally encased for the duration of the grit-blasting and painting stage of the works.
Stonework Repairs to Shillingford Bridge
The project required stonework repairs to this Grade II Listed structure over the River Thames. The works were concerned with the three river spans and involved the restoration of all three river arches, the balustrades above these spans and the south west wing wall.
Flash Lane Aqueduct Maintenance & Repairs
Works on this listed ancient monument comprised the repair and cleaning of the masonry on the bridge, cleaning and protective painting of the aqueduct, repair of the handrail and control of water penetration through the abutments.
Lulle Brook Bridge Strenghtening
The work comprised the demolition of the existing 36m long, 6m span bridge deck and replacement with a lightweight steel deck.
Refurbishment of the existing substructure above and below the waterline.
Other parts of the works included installation of new parapets, application of a paint protection system.
Expansion joints and bearing installation.
Willen Lake Bridge Strengthening
The Project involved structural strengthening comprising CFRP reinforcement to the east and west piers of the Willen Lake Floodplain bridge. Works included strengthening of the verge slab and associated tie beams, replacement of the existing parapets, strengthening of the concrete upstand beams and replacement of the existing movement joints. General concrete repairs were undertaken with cementitious mortar and cathodic protection to the east and west piers.