Mapei products were specified for a capacity upgrade project with London Underground at Bank Station
Capacity upgrade project with London Underground at Bank Station.
Mapei products were specified for a capacity upgrade project
with London Underground at Bank Station. Originally opened
in 1900 at Bank Junction, the station is served by the Central,
Waterloo & City, and Northern lines, as well as the Docklands
Light Railway. The upgrade required materials for waterproofing,
repairs to the concrete and masonry, as well as a new
construction and structural reinforcement.
Due to the detailed specification and the parameters for
completion, UTT Manager for Mapei UK, Steve Price developed
and delivered training to operatives who required further technical
assistance with the waterproofing system, specifically for the
complex installation. Main contractors Dragados agreed that the
training provided by Mapei was the key to making the project run
smoothly and ensuring the installers were trained to apply and
test the new products properly.
Delivery of the training was assisted with expertise from Mapei’s
UTT technical support, a dedicated resource for underground
construction. The training, consisting of two modules, was made
up of a theory course examining the technical requirements for
successful application, followed by a second module – the actual
operation of equipment and application through to testing. This
approach has resulted in the most successful application of
underground waterproofing seen in the UK.
Mapegrout Gunite FSD and the Mapelastic TU System were
specified for the project, with both sharing the requirement of
being packaged in a way that would minimise lifts during use
in the tunnel shaft; larger pallets and packaging were more
convenient for the station upgrade.
Mapelastic TU System provided many advantages for the project.
The one-component, ready to use membrane offered a clean
and neat application with no overspray proving to be useful at
Bank Station due to the small passageway adits and tunnels.
Due to its pre-mixed formula, the system eliminated dust from
the application whilst providing consistency between each layer.
It was applied in the colour green to ensure visible complete
coverage to each layer.
Mapegrout Gunite FSD was applied using a dry spray process,
creating a thixotropic consistency for easy application on vertical
and overhead surfaces. Its extra fast curing allowed the installers
and equipment to move through the tunnels quickly, thus
improving the speed of application.