HS2 works update

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Harvil Road Night Time Road Closures for Snagging Works – Mon 28/04 to Mon 19/05 
The 3 weeks of Night Time Road Closures of Harvil Road were completed on Mon 19/05 in time for the 5am opening of the road.  
All of the Snagging works along the new section of Highway between the Dogs Trust and HS2 Gate 1 have now been completed and the maintenance responsibility for this section of road has now been handed over from HS2 to LBH.
Construction of Tunnel Walkways from West Ruislip Portal – May 2025 to Feb 2026 
With the tunnelling now completed on the 2 tunnels between West Ruislip Portal and Greenpark Way Vent Shaft, the next stage is to build tunnel walkways inside the tunnels. There will be 2 walkways built inside each tunnel, a narrow walkway for maintenance access and a wider walkway to be used to safely evacuate passengers in case of emergency (once the railway is operational).  
In order to be build these walkways there will be concrete deliveries by lorry 24 hours a day, 7 days a week between the end of May 2025 and Feb 2026 to the West Ruislip Portal Site off Ickenham Road. 
The lorries will deliver ready-mixed concrete to electric pumps located behind a 2 metre high wall at the tunnel entrance (see map overleaf). The concrete will be pumped through a pipe into the concrete mixer truck and taken into the tunnels. The walkways will be built along the entire length of the tunnel using a Formwork system (Formwork is a temporary structure which shapes the walkway). The concrete is poured into the Formwork until it hardens, with the Formwork system being moved along the inside of the tunnel until the walkways are completed. 
HS2/SCS do not expect that these works will be noisy above ground as they will all take place within the tunnels, but there will be concrete deliveries by lorry 24 hours a day, 7 days a week. The Map below shows the location of the works:
Demobilisation works at West Ruislip Portal Site – March to Sept 2025 
With the 2nd Tunnel Boring Machine (TBM) Caroline completing her tunnelling journey to Greenpark Way Vent Shaft in April 2025, works will continue to remove tunnelling support structures inside and outside the tunnels at West Ruislip Portal Site. There will be demobilisation and removal works carried out for the following:  The conveyor structure – ongoing The launch chamber entrance – ongoing Rail siding – ongoing Gantry cranes and segment yard – ongoing Conveyor bridges – to be scheduled  
Removal of the Conveyor Structure – January to July 2025
HS2 have started dismantling and removing the Conveyor Structure by crane from within the West Ruislip Portal entrance from 02/01/25 with these works expecting to take until July 2025 to complete. The 1st Phase of these works will be removing the Conveyor Structure from the Downline Tunnel (as Sushila has completed her tunnelling) and then out into the Tunnel Portal at West Ruislip Now that TBM Caroline has completed tunnelling in April 2025 then the process will be repeated for the Upline Tunnel Then finally all of the remaining Conveyor Structure can be removed all the way from West Ruislip Portal along to the Treatment Area at Harvil Road Gate 1 Site. and Removal of Rail Siding at West Ruislip Portal – March to June 2025   The last Night Time delivery of TBM Segments by Railway to the West Ruislip Portal took place on 14/03 so now works have begun to decommission and remove the Rail Siding that accesses the HS2 Site from the main Chiltern Railway Line.   The track and ballast have now been removed, with the ballast being donated to the Bluebell Railway in West Sussex (see link below for more information):   HS2 donates 4,000 tonnes of ballast to Bluebell Railway | RailBusinessDaily   It is expected that the Rail Siding will be completely removed by June 2025.