• Pedestrian Link Bridge at LLA
  • Pedestrian Link Bridge at LLA

Pedestrian Link Bridge at LLA

Date_ 1 September 2016

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.