PAST PROJECTS:
Brief Descriptions of a Selection of our Past Projects:
Hillingdon Station, London.
Re-design of permanent reinforced concrete pile caps to suit bored piles that had been installed out of position. Design of a steel king pile cofferdam to retain a deep excavation and to support a temporary railway deck structure. This work was carried out in association with other consultants for Balfour Beatty Civil Engineering and Stent Foundations.
Skye Bridge, Scotland.
Design of structural steel falsework to support the pier-head segments of a pre-stressed concrete box girder bridge. Independent checking of the travelling formwork system used to construct the balanced cantilever deck. This work was carried out in association with other consultants for Miller-Dividag Joint Venture.
Suralaya Power Station Malaysia.
Design of a cellular steel cofferdam in 14m of water over rock for construction of the cooling water pumping station. The temporary works were checked for earthquake loading. This work was carried out in association with other consultants for Balfour Beatty International.
Kap Shui Mun Bridge, Hong Kong. PICTURE
Design of tower base formwork. Formwork for a reinforced concrete pad footing 50m by 15m by 5m thick and a pre-stressed concrete upstand beam 10m deep by 5m wide.
Design of lower strut falsework. Structural steel falsework was designed to support a pre-stressed concrete beam 5m by 5m by 30m long. The beam was cast in situ 15m above the top of the foundation upstand beam.
Ma Wan Viaducts, Hong Kong. PICTURE
Planning of sequential erection of four tower cranes, at nine different positions, during construction of a very large pre-stressed concrete box girder bridge. Design of all the crane bases and stabilising ties to the bridge piers.
Preparation of enquiries and advising on tenders received for the main deck falsework subcontract. The successful tenderer supplied about 3500 tonnes of falsework equipment for propping heights up to 35m.
Design of structural steel bases to connect concrete placing booms to the falsework structure.
Design of falsework spanning between the permanent pier stems to carry the deck diaphragm beams. The reinforced concrete cast in situ beams were 5.5m wide and 3.5m deep. They were supported 30m above ground at the pier heads.
Design of a temporary deck restraint system, to fix a section of the superstructure to the abutment, until connection to the fixed portion of the bridge. To restrain the movement of the free sliding bridge bearings, brackets were fixed to the sides of the deck and connected to the abutment by horizontal pre-stressing bars.
Design of traveling side access platforms. Running on rails on the bridge deck the platforms provided access to the sides of the 7.6m deep box girders for installation of furniture and cladding panels after removal of the falsework.
Design of structural steel falsework to the end span. Where ground level restrictions required the falsework to span gaps of up to 12m the proprietary falsework system was not suitable. A structural steel falsework structure was designed using deep rolled steel sections to span the gaps. The overall dimensions of the temporary structure were 45m by 35m by 35m. It was fabricated on site from 1200 tonnes of structural steel.
All work on the Kap Shui Mun Bridge and Ma Wan Viaducts was carried out for the main contractor Maeda Corporation (Hong Kong branch) acting as part of the Kumagai Maeda Yokogawa Hitachi Joint Venture. This work forms part of the Hong Kong Airport Core Programme of infrastructure projects.
Kuala Lumpur New Airport Maintenance Hangar.
Tender design of roof lifting system and checks on stresses in the permanent works during erection of a structural steel aircraft hangar roof. The roof contains about 6000 tonnes of structural steel and spans 190m by 100m. This work was carried out at tender stage for Maeda Corporation Malaysia branch.
Singapore Metro Extension.
Tender design of temporary retaining walls to support station excavations up to 17m deep for Benaim Group.
West Rail Viaducts, Hong Kong.
Engaged by Maeda Chun Wo Joint Venture to assist with their successful tenders for 10km of dual glued segmental railway viaducts. Advised on erection methods and temporary works design and liaison with the permanent works designer preparing the contractor’s alternative design.
Hung Hom Bypass, Hong Kong.
Engaged by Maeda Chun Wo Joint Venture. The joint venture’s contract was for construction of 5km of glued segmental viaducts, to form a new elevated road junction, to the contractor's alternative design. Engaged for supervision of and liaison with the UK based permanent works designer and French erection subcontractor.
Design of falsework for the in situ sections of the bridge deck. Assisting with preparation of casting geometry for short-line match-casting process.
Design of temporary deck pre-stressing schemes for use during erection.
Design of temporary access bridges for segment carriers and general construction traffic.
Nam Cheong Station Excavation, West Rail, Hong Kong.
Engaged by Benaim Group to assist with design of a large propped steel sheet piled excavation support scheme. The station excavation covered an area approximately 400 metres by 100 metres and was up to 16 metres deep.
Analysis of sheet pile stresses and deflections, calculation of prop loads.
Outline and detailed design of heavy steel strutting frames.
Touchwood Court Solihull, Propping to Secant Walls.
Engaged by Swift Structures Ltd. For design of tower crane base, cantilever loading platforms, and sections of permanent works cantilever slabs during refurbishment of a 30 storey concrete framed office block. Extensive checks on the capacity of the permanent works to support the temporary works.
Town Quay, Southampton.
Engaged by Raynesway Construction Southern Ltd for tender design of a reinforced concrete jetty deck structure to replace an existing pier.
Canary Wharf, London.
Engaged by Universal Builders Supply Ltd. for design of specialist scaffold structures and lifting gear associated with multi-storey rack & pinion and rope hauled hoisting systems.
General, suspended and cantilever access scaffold designs.
Design of structural steel supports to runway beam hoists.
PAST PROJECTS:
While Employed by Geoffrey Osborne Ltd and Walcon Construction Ltd:
Wimbledon Bridge Development, SW London.
Design of specialised lifting gear and planning of heavy lifting operations to place steel beams and pre-cast concrete slabs over a main railway line during possessions.
Bishops Waltham Sewage Treatment Works, Hampshire.
Design of steel sheet piled cofferdams for construction of pumping stations up to 8m deep. Formwork planning for reinforced concrete settlement tanks and storm tanks.
Teignmouth Quays, Devon.
Permanent works design and construction planning for a design and construct tender to replace quay walls. Retained heights at this small commercial port were up to 8.5m and the new walls were to be installed with a minimum of disruption to port operations.
Cable Stayed Footbridge over Yiewsley Bypass, Heathrow, London.
Design of falsework in scaffolding and structural steel including a 15m span across a live road. The falsework supported the composite bridge deck during assembly of the steel deck beams, construction of the concrete deck slab and installation of the cable stays.
