HS2 works update

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New Breakspear Road South Road Closure – Fri 29/08 at 8pm until Sun 31/08 at 8pm
 
HS2/SCS have agreed with LBH that Breakspear Road South will be closed at the Chiltern Railway Bridge from Fri 29/08 at 8pm until Sun 31/08 at 8pm while the Conveyor Bridge that oversails the Highway is removed (Conveyor Bridge shown in the photo below).
 
The Conveyor Bridge carries the Conveyor system that was used to transport the TBM Spoil/Material over Breakspear Road South towards the Treatment Area at Harvil Road Gate 1. Now that both TBMs have completed their tunnelling between West Ruislip and Greenpark Way in LB Ealing the Conveyors are being removed and the Bridges that carry the Conveyor can also be removed.
 
These works will involve laying Matting on the road surface to protect it, then using a Crane to lower the Bridge to ground level before dismantling and removing it. The road would then be cleared with the Matting removed before reopening to the public.
 
This has been scheduled for the last weekend of the school summer holidays to minimise disruption and to also allow LBH a larger window of opportunity to schedule in the planned LBH resurfacing works which will close Harvil Road for a likely 4 week period earlier in the summer holidays (dates to be finalised).
 
I will confirm the details of the Diversion Route once confirmed with HS2/SCS but it is likely to be the usual Diversion via Swakeleys Road, Ickenham High Road, Bury Street, Breakspear Road
 
New 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.