London Luton Airport

Whitemountain have recently completed a major Design and Build Infrastructure Upgrade Contract for Civil Engineering Works at London Luton Airport.

The project was procured and delivered as a Design and Build under the NEC3 Option A Form of Contract. The landside civil engineering works were designed to improve access, circulation and parking facilities required to support the airport expansion plans and to improve passenger facilities. 

The works involved construction of 2.5km of new internal roads in addition to 700m of new dual carriageway and a new 50m dia roundabout which was constructed at the front of the terminal building to align with new Central Terminal Area. The roundabout construction was phased to minimise disruption with all offline works completed first, traffic diverted onto the new roundabout and the infill sections completed to provide the final circulatory lanes.

A significant element of the project involved the construction of a new enclosed pedestrian footbridge over the short term car park and central terminal area with two spans, 70m and 35m respectively.

The Pedestrian Link Bridge is a new walkway structure proposed to provide pedestrian access from the new Multi Storey Car Park (MSCP) and Short Stay Car Park to the CTA area.

The structure is supported on three vertical circulation cores VCC’s– two of which are two storey structures and one which has five storeys to align with the levels within the MSCP and provide access to that structure. 

The main span of the Link Bridge is supported at intermediate locations by Vee Columns, which sit directly on concrete piers. To enable the current access roadway proposals and safeguard for future provision of access roadways beneath the structure the concrete piers are at irregular centres resulting in a main span of 36m with shorter 15m and 18m spans between piers and the VCC’s. 

The VCC structures are a steel frame construction. A piled foundation solution with pile caps has been installed and the ground floor slab is a 300mm thick reinforced concrete suspended slab with ground beams provided to support the cladding and to tie the pile caps together. Stair structures within the Link Bridge have been constructed using 225mm thick precast concrete stair landings with 175mm thick waists to the stair flights. 

The connecting link bridges are 80m and 32m Warren Truss structures. The 80m span between cores 1 & 2 was split into three sections which were prefabricated off site and lifted into position using a 250T mobile crane. The largest of the 3 sections was 29m long and weighed 34T. The link bridge between cores 2 & 3 spanned 32m and was delivered in 2 separate sections to site due to transport logistics. The 2 no. sections were connected on site and lifted into position using a 350T crane.
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