Skip to main page content
Media
Contact us
Search
Search
Close
search
Search on HS2
Search
Some suggestions
HS2
Route Map
In your area map
What is HS2
Menu
What is HS2
Back
one level
What is HS2
HS2 Project Update
Back
one level
HS2 Benefits Update
HS2 in the West Midlands
Back
one level
HS2 in the West Midlands Report, March 2023
HS2 in Parliament
Building HS2
Back
one level
Building HS2
Trains
Back
one level
HS2 Infrastructure Maintenance Depot
Washwood Heath Depot and Network Integrated Control Centre
Stations
Back
one level
London Euston
Back
one level
Euston Approaches
Traction Substation (TSS)
Plans for Maria Fidelis School
Temporary uses at Euston
The Euston Partnership
Old Oak Common
Back
one level
Old Oak Common Lane Bridge
London conveyor belt network
Victoria Road Crossover Box and Ancillary Shaft
Interchange
Back
one level
Automated People Mover
Birmingham Curzon Street
Back
one level
Old Curzon Street Station building
Tunnels
Back
one level
Euston Approaches
Twin-bore tunnels
Back
one level
Euston Tunnel
Back
one level
Atlas Road Logistics Tunnel
Northolt Tunnel
Back
one level
London conveyor belt network
Chiltern Tunnel
Long Itchington Wood Tunnel
Back
one level
Warwickshire conveyor belt network
Bromford Tunnel
Green Tunnels
Back
one level
Copthall Green Tunnel
Greatworth Green Tunnel
Chipping Warden Green Tunnel
Burton Green Tunnel
Meet our giant Tunnel Boring Machines
Back
one level
Naming the HS2 Tunnel Boring Machines
London Logistics Hub
Headhouses and Ventilation Shafts
Back
one level
Euston Approaches
Back
one level
Euston Portal Headhouse
Euston Cavern Headhouse
Euston Tunnel
Back
one level
Adelaide Road Headhouse
Canterbury Works Headhouse
Victoria Road Crossover Box and Ancillary Shaft
Northolt Tunnel
Back
one level
Westgate Headhouse
Greenpark Way Headhouse
Mandeville Road Headhouse
South Ruislip Headhouse
Chiltern Tunnel
Back
one level
Chalfont St Peter Headhouse
Chalfont St Giles Headhouse
Amersham Headhouse
Chesham Road Intervention Shaft
Little Missenden Headhouse
Chiltern Tunnel North Portal
Viaducts and bridges
Back
one level
Buckinghamshire to Oxfordshire
Back
one level
Colne Valley Viaduct
Back
one level
Meet our bridge-building machine
Managing water in the Chilterns and Colne Valley area
Small Dean Viaduct
Wendover Dean Viaduct
Westbury Viaduct
Thame Valley Viaduct
Turweston Green Bridge
Rural footbridges
Northamptonshire to Warwickshire
Back
one level
Highfurlong Brook Viaduct
Lower Thorpe Viaduct
Edgcote Viaduct
Oxford Canal Viaduct
Kenilworth Overbridge
River Blythe Viaduct
Birmingham and Fazeley Canal Viaduct
Marston Box Rail Bridge
River Cole Viaducts and Chattle Hill Structure
Water Orton Viaducts
River Tame Viaduct
Solihull to Birmingham
Back
one level
Balsall Common Viaduct
Aston Church Road Overbridge
Saltley Viaduct
Curzon No.2 Viaduct
Curzon No.3 Viaduct and the Lawley Middleway Viaduct
Staffordshire
Back
one level
Fulfen Wood Overbridge
Streethay Overbridge
Cuttings and embankments
Back
one level
Calvert Cutting
Barton Hartshorn to Mixbury Cutting
Canley Brook Cutting
Archaeology
Back
one level
Camden to Hertfordshire
Back
one level
St James’ Gardens Burial Ground
Back
one level
Captain Matthew Flinders
Hillingdon Hoard
West Ruislip Golf Course
Buckinghamshire to Oxfordshire
Back
one level
Wellwick Farm
Wendover burial ground
St Mary’s Church
Fleet Marston
Three Bridge Mill
Buckingham Watermill
Northamptonshire to Birmingham
Back
one level
Blackgrounds Farm
Offchurch
Coleshill Manor
Curzon Street Station
Back
one level
The Principal Building at Birmingham Curzon Street
Dignity, care, respect
Sharing the discoveries
Community Voices
Environmental Sustainability
Back
one level
HS2 and biodiversity
Protecting the natural environment
Back
one level
Ancient woodland
Green Corridor
Back
one level
Sheephouse Wood Bat Protection Structure
Chilterns South Portal Chalk Grassland Project
Reducing carbon in construction
A net-zero railway
A climate resilient railway
Design
Back
one level
HS2 Design Vision
Innovation
Back
one level
Environment
Safety
Customer
Productivity
Digital Engineering and BIM
How to build a railway (HS2 Podcast)
Back
one level
Episode One: The What and the Why of HS2
Episode Two: Unearthing History
Episode Three: Preparing the ground
Episode Four: Creating the Green Corridor
Episode Five: Opportunity for Innovation
Episode Six: Going underground
Episode Seven: Building Bridges
Episode Eight: Our next stop is…
Episode Nine: From Track to The Cloud – the Layers of Railway Systems
Episode Ten: Keeping things clean – our journey to net zero
Episode Eleven: Safe at heart
Episode Twelve: Leaving a legacy
Learning Legacy
Back
one level
HS2 Learning Legacy Podcast
Back
one level
Episode One: Building a Learning Legacy
Episode Two: The blueprint and the real thing
Episode Three: Reducing and reusing
Episode Four: Being safe and inclusive every step of the way
Episode Five: How to swim in a sea of data
In your area
Back
one level
In your area
In your area map
Back
one level
Search current works (text only)
HS2 in your area
Back
one level
HS2 in Camden
Back
one level
Community engagement in Camden
HS2 in Old Oak and North Acton
Back
one level
Community engagement in Old Oak & North Acton
HS2 in Brent and Ealing
HS2 in Hillingdon
Back
one level
Community engagement in Hillingdon
HS2 in Hertfordshire
HS2 in Buckinghamshire and Oxfordshire
HS2 in Northamptonshire
HS2 in Solihull
HS2 in Warwickshire
HS2 in Birmingham
HS2 in Staffordshire
West Midlands to Crewe (Phase 2a)
West Midlands to Leeds (Phase 2b – Eastern leg)
Crewe to Manchester (Phase 2b – Western Leg)
Managing impacts of construction
Back
one level
Air quality
Construction noise and vibration
Ground Settlement
Operational noise and vibration
Traffic management
Water supply and management
Land affected by HS2
Back
one level
Apply for property assistance schemes
Track my property case
Find out if your home is affected
Safeguarding
Access to land and property
Conveyancing Process – selling your property
Project rescoping: Phase Two cancellation
Community and business funding
HS2 Independent Commissioners
HS2 route-wide injunction
Respectful conversations
Events
Supply chain
Back
one level
Supply chain
Direct contract opportunities
Indirect contract opportunities
Supply chain case studies
Back
one level
Ainscough Crane Hire – case study
CLM – case study
Concept Engineering – case study
Crowders – case study
Expanded – case study
Five Rivers Environmental – case study
GAP Group – case study
Hatton Traffic Management – case study
HW Martin – case study
Innovating to prevent occupational deafness in construction – case study
Littlewood Fencing – case study
McAuliffe Group – case study
Total Reclaims Demolition – case study
Wernick Group – case study
Supply Chain Map
Technical documents and publicity guidance
HS2 and your business
Back
one level
Business Networks
Local Business Toolkit
Trinity Asset Management – a local business case study
HS2 Ltd ‘Speak Out’
Jobs and skills
Back
one level
Jobs and skills
Careers with HS2 Ltd
Back
one level
Search and apply for jobs with HS2 Ltd
Job benefits and application support
Apprentices and graduates
Rail systems careers
Everyone matters
Our awards
Our offices
Careers with our supply chain
Back
one level
Search and apply for jobs with our supply chain
Employee stories
Back
one level
HS2 apprenticeship journeys
HS2 graduate journeys
Women in engineering
HS2 educational programme
About us
Back
one level
About us
Our vision, mission, principles and values
Our corporate publications
Our people
Our governance
Back
one level
Publication scheme
Our approach to health and safety
Back
one level
Safe at heart
Health and Safety document library
Our responsible business
Back
one level
Responsible business and people
Responsible business and communities
Responsible business and the environment
Our policies and procedures
Back
one level
Modern slavery and human trafficking statement
Privacy policy
Our Equality, Diversity, and Inclusion work
Our documents
Published:
7 October 2020
Last updated:
7 October 2020
View document history
Document:
Phase 2b factsheet: Vent shafts and porous portals
PDF ,
234.71 KB ,
8 pages
Published:
7 October 2020
Get this document
- Phase 2b factsheet: Vent shafts and porous portals, PDF, 234.71 KB
Document history
Published:
7 October 2020
Updated:
7 October 2020