A periodical look at the construction of the Northern line extension to Battersea.

Battersea Power Station (station)

The rail team have now completed the installation of 1500 metres of low vibration track, along with the safety walkway, covering the stretch from Nine Elms to Battersea in both the south and northbound tunnels.

Within the main station, the pre-cast platform and first stage concrete track slab have now been completed which will allow the rail team to begin laying the track in the station box.

The western core – the structure now visibly above the hoarding – has been built from basement level -4 to level 3.

The team are at the final stages of installing the supporting walls and columns for the 1.5 m thick roof slab which will make this structure reach a height of 35m. The western core will house the future western entrance to the station and will form the base foundation for the over site development (OSD) building

The first main fit out package has been the block work which starts to form the rooms and corridors within the station, slowly turning the concrete structure into the future underground station.

Nine Elms Station

The east headwall which is the wall around the tunnel eyes is now complete. The tunnel eyes were cut to profile using a remote controlled demolition machine.

At the moment, one of the main activities taking place on site is the installation of the precast platform at basement level -3, made up of 577 precast elements (walls and slabs).

Works have also started to create the superstructure in the east of site (towards

Wandsworth Road). This will be a two storey reinforced concrete structure that will rise approximately 12m above ground level and will house the future ticket hall entrance to the station.

Kennington Park construction site

The acoustic enclosure has now been completely dismantled at Kennington Park site and they have removed the first concrete slab that was forming the floor of the site.

The teams are now excavating the site to form the basement of the future Head House. Once this is complete, construction of the main structure of the Head House with start, which will continue into next year.

Kennington Green construction site

Big changes have been taking place at Kennington Green this summer. The excavation of the basement that will form the structure of the future KG Head House basement floor is now 11.5m deep.

Regarding tunnelling works, the teams have now completed 700m of railing. The construction of the cross passages along the route is ongoing. These cross passages are smaller tunnels that will connect the main northbound and southbound tunnels and will be used for emergency access.

All photos (c) TfL