Forming part of the inspiring new £20 million Leeds Station Southern Entrance scheme built across the River Aire, the specification of Sika admixtures solutions in the Hanson concrete mix has ensured that the underwater concrete foundations offer very high resistance to washout and will stand the test of time.
Built by Carillion Rail for clients West Yorkshire Combined Authority and Network Rail, the new Leeds Station Southern Entrance (LSSE) will enable greater access to one of the busiest stations in the UK and will comprise a concourse deck over the River Aire within a visually eye catching enclosed building.
To form the concrete foundations of the structure, specialist contractor Martello Piling sunk steel tubes into the river bed in front of the bridge bases with 360m3 of Hanson concrete containing Sika® PilePak placed into these tubes. Ideal for difficult piling conditions, the Sika® PilePak was used to ensure consistency and workability of the concrete over a prolonged period of time, to avoid any concrete problems at any one pile position.
Stephen Armfield, Product Development Manager, Sika commented: “The environmental extremes of having to place concrete into a river were a particular challenge on this project. Requiring high quality concrete and specialist kit including special pumps as well as commercial divers ensured the critical path of these foundations was a success.”