Ian's Bridges.
- Foyle Bridge, Londonderry
- Paddington Long Term Vehicular Access Project
- Westminster Bridge.
- Auckland Harbour Bridge.
- Marlow Bridge.
- Avonmouth Bridge
- Tamar Suspension Bridge Strengthening and Widening Project
- Selby Swing Bridge
- Hammersmith Bridge
- Royal Albert Bridge, Saltash.
- Hungerford Millennium Footbridge Project.
- Cleddau Bridge, Milford Haven, Pembrokeshire.
Foyle Bridge, Londonderry.
Foyle Bridge consists of two side-by-side steel box girder bridges with a main span of 233m. An assessment concluded that under current loading, the bridge fails to comply with strength requirements. Feasibility study of strengthening options, design of the strengthening works, preparation of tender drawings and documents, produced leaflet for distribution to local residents.
Paddington Long Term Vehicular Access Project.
Co-ordinated technical advice to the Technical Approval Authority (Westminster City Council) for this replacement six lane bridge. The bridge crosses rail lines, Underground and future Crossrail tunnels, sewers, a canal and towpaths. In addition to the demolition of existing bridges and construction of new plate girder bridges, the project included coordination of advance highway works, service diversions, a 900mm diameter services tunnel, Railtrack overhead electrification diversions and signalling moves.
Westminster Bridge.
Finite element analysis of 130 year old cracked cast iron fascia girders, evaluated a dismantling and installation sequence for new cast iron girders.
Auckland Harbour Bridge.
Derivation of a Bridge Specific Assessment of Live Loading on this 8 lane bridge.
Marlow Bridge.
Marlow Bridge is a Grade I listed suspension bridge crossing the Thames at Marlow in Buckinghamshire, with a main span of 69m. The project involves replacing worn bearings linking the bridge deck to the abutments, and hangers that have been damaged by vehicle impact, and painting of all steelwork.
Managed bid for the work, feasibility study and detail design. The solutions demanded sensitive engineering and attention to detail to obtain the necessary consents from English Heritage.
Avonmouth Bridge
Avonmouth Bridge carries the M5 motorway for 1400m over the river Avon to the west of Bristol. Opened in 1975 it has now been strengthened to take the new European 40 tonne lorries admitted to the UK since January 1999, and widened to 4 running lanes in each direction.
Answered technical queries from site for this twin box girder bridge. Non-linear plastic finite element analysis of cross girders, where ring stiffeners had to be cut where they clashed with longitudinal stiffeners. Analysis of weld group details for the prestressing bars over the approach span piers, and the splices between the strengthening plates to the bottom flange longitudinal stiffeners. Non-linear finite element analysis of a support diaphragm. Checked the placement of a 120 tonne crane for installing a 40 tonne overhead sign gantry on the bridge.
Produced and entered a poster for the IStructE awards, Strengthening of Avonmouth Bridge, (pdf 310KB), project awarded the Institution of Structural Engineers' Structural Achievement Award 2001.
Tamar Suspension Bridge Strengthening and Widening Project
On-site structural monitoring, supervision of cantilever deck installation, design of runway beam repairs, responsible for the redesign, approval of the fabrication drawings and construction supervision of new tower top walkways.
Produced and entered a poster for the IStructE awards, Strengthening and Widening of Tamar Bridge, (pdf 426KB), project awarded Institution of Structural Engineers' Structural Achievement Award 2003.
Selby Swing Bridge
To allow the passage of large vessels on the River Ouse, the new Selby Bypass features a 95m long cable stayed swing bridge that rotates through 90º to give unlimited headroom. I was responsible for Mechanical and Electrical aspects of the Illustrative Design, Employer’s Requirements, Specification, and Approval in Principle documents.
The M&E aspects included traffic lights, automatic barriers, retractable bearings at the ends and middle of the bridge, a 4m diameter slewing ring, rack and pinion motor drive, with a control sequence to co-ordinate the sequence.
Hammersmith Bridge
On-site Technical Advisor to the client for the replacement of deck panels, and masonry and steelwork repairs on this Grade II listed 128m main span suspension bridge.
Royal Albert Bridge, Saltash.
Brunel’s Royal Albert Bridge carries the main railway line into Cornwall. The simply supported Approach Spans, rebuilt in the 1920s, required the replacement of their timber bearings. I carried out a feasibility study for ways of lifting these girders complete with ballast and track during night time closures. As access from below is impracticable, this could either be done from a lifting beam pivoted on the top of an adjacent girder, or by jacking the end of the beam directly from the pier top.
Hungerford Millennium Footbridge Project.
Category III check of the 300m long six span cable-stayed concrete decked Hungerford Millennium Footbridge Project. I was responsible for checking the construction sequence, dynamics and aerodynamics.
Cleddau Bridge, Milford Haven, Pembrokeshire.
Cleddau Bridge is an 810m steel box girder bridge with a 213m main span built between 1969 and 1975. Checking a set of as-built drawings of Cleddau Bridge against the fabrication drawings and against the bridge itself. These were needed for an assessment of the bridge capacity to take the new European 40 tonne lorries. Category III check of the assessment. Set up a global analysis of the bridge, checked the design of box-girder webs.
