HS2

20.08.20

HS2 release designs for Amersham vent shaft headhouse

Today (Aug 20) HS2 have released the design for one of the five structures that will be built to provide ventilation and emergency access to the high-speed rail line’s 10-mile-long Chiltern tunnel.

The Amersham vent shaft headhouse will be set in the middle of a road junction just outside the town, the circular single-storey building will be enclosed by a spiral shaped weathered steel wall designed to echo the shape of the site and the natural tones of the surrounding landscape.

Below ground level, an 18-metre-deep ventilation shaft will reach down to the twin tunnels below, with fans and other equipment designed to control air quality and temperature, remove smoke in the event of a fire and provide access for the emergency services.

HS2 worked with the Chilterns AONB Review Group and Buckinghamshire Council during the expansion of the designs and this week launched an online virtual engagement site to gather views from the local community.

05 Amersham Vent Shaft 3d diagram © Grimshaw Align

The plans have been designed by HS2 Ltd’s main works contractor Align JV, a team made up of Bouygues Travaux Publics, Sir Robert McApline, and VolkerFitzpatrick, working with its design partners Jacobs and Ingerop-Rendel, architects Grimshaw and landscape designers, LDA Design.

HS2 Ltd’s Design Director, Kay Hughes, said: “Today’s reveal of the latest designs for the Amersham vent shaft and headhouse is an important milestone for the project. Inspired by the location and the form of the shaft beneath, the headhouse will be one of the few parts of the Chiltern tunnel visible to residents living nearby so it was important that we get the design right. Align and their design partners have put an incredible amount of work into these proposals and I hope the design will be welcomed by the local community.”

Daniel Altier, Align Project Director said: “We are excited to be revealing our early designs for the Amersham vent shaft headhouse. Our designers have worked closely with stakeholders to design something that reduces local construction impacts as far as practicable during the build.  We now look forward to giving the local community their opportunity to provide their thoughts on the design”

Image: HS2 Ltd

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