hs2 common design elements - gov.uk · 2017-03-16 · hs2 cde lineside noise barriers –key...
TRANSCRIPT
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HS2 Common Design ElementsArchitectural Elements within Civil Engineering Works
Planning Forum 25/26 January 2017
ATK EDPBob Barlov RIBA – CDE Civils Technical Lead
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HS2 CDE Scope
Lineside Noise Barriers
Retaining Structures –
Architectural Treatment
Handrails
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HS2 CDE Key Background Documents
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HS2 CDE Design Vision
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HS2 CDE
Lineside Noise Barriers
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HS2 CDE Lineside Noise Barriers – Key Background Documents
‐ … the assessment has generally been based on noise
barriers having a noise reduction performance equivalent to
a noise fence barrier with a top level 3m above the top of
the rail, that is acoustically absorbent on the railway side,
and located 5m to the side of the outer rail.
‐ …there is a balance to be struck between the benefits
gained by a set of line-wide standard components …
against the need for the noise barriers to sit comfortably
within their context. There is an opportunity here to consider
one adaptable system, a related urban and rural system etc.
‐ Wherever possible combine security fencing with noise
barrier to reduce visual clutter
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HS2 CDE Lineside Noise Barriers – Scope
‐ Viaduct Noise Barrier – not included in CDE Scope (part of
Viaduct design), but coordination is required
‐ Lineside ‘Fence’ Noise Barrier – included in CDE Scope
‐ 11.4km fence barriers on both sides and further 23.2km
fence barriers on one side of railway (HB).
‐ Noise mitigation achieved with earthworks – not included in
CDE Scope
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HS2 CDE Lineside Noise Barriers – Acoustic Criteria
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HS2 CDE
Lineside Noise Barriers
Typical Types
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HS2 CDE Lineside Noise Barriers – Timber & Metal Hybrid
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HS2 CDE Lineside Noise Barriers – Proprietary Metal System
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HS2 CDE Lineside Noise Barriers – Precast Concrete Steel Frame
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HS2 CDE Lineside Noise Barriers – Gabion Wall
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HS2 CDE Lineside Noise Barriers – Precast Concrete Wall
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HS2 CDE Lineside Noise Barriers – PC Base & Steel Frame
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HS2 CDE Lineside Noise Barriers – Construction Types Summary
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HS2 CDE Lineside Noise Barriers – Construction Types SIFT Criteria
‐Construction Feasibility
‐Aesthetics
‐Vulnerability to Vandalism
‐Maintainability
‐Durability & Reliability
‐ Initial Capital Costs
‐Whole Life Costs
‐Sustainability
‐Safety during Construction
‐Safety during Maintenance
Construction
Feasibility
Appearance and
Response to
context
Vulnerability to
Vandalism
Maintainability Durability &
Reliability
Initial Capital Costs
Whole Life Costs Sustainability Safety
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HS2 CDE Lineside Noise Barriers – Construction Types SIFT Selection
‐ Image to be added
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HS2 CDE Lineside Noise Barriers – Proposed Precast Concrete Wall Module
Image to be amended
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HS2 CDE Lineside Noise Barriers – Noise Absorbent Cladding Facing Track
Wood Cement Light Expanded Clay Aggregate
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HS2 CDE Lineside Noise Barriers – Noise Absorbent Cladding Pattern Options
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HS2 CDE Lineside Noise Barriers – Cladding Options Facing Away From Track
Cladding material to be selected on a case by case basis
and in response to local context.
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HS2 CDE Lineside Noise Barriers – Timber Cladding Option
Cladding material to be selected on a case by case basis
and in response to local context.
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HS2 CDE Lineside Noise Barriers – Brick Cladding Option
Cladding material to be selected on a case by case basis
and in response to local context.
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HS2 CDE
Retaining Structures
Architectural Treatment
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HS2 CDE Retaining Structures – Key Background Documents
Bridge Design Requirements
‐ Self-finished materials
‐ Prevent water staining
‐ Visible concrete should be Class F3*
‐ Consider application of texture and patterning
*… smooth and of uniform texture and appearance…
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HS2 CDE Retaining Structures – Cuttings, Family of Types
- Embedded Walls Cladding
- In situ RC Walls Architectural Treatment
- Precast RC Walls Architectural Treatment(?)
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HS2 CDE Retaining Structures – Architectural Treatment
- Embedded Walls Cladding
- In situ RC Walls Architectural Treatment
- Precast RC Walls Architectural Treatment(?)
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HS2 CDE Retaining Structures with Noise Absorbent Material - Architectural Treatment
- Embedded Walls Cladding
- In situ RC Walls Architectural Treatment
- Precast RC Walls Architectural Treatment(?)
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HS2 CDE Retaining Structures – In Situ Concrete, Architectural Treatment
Plan Section
Patterned Concrete Detailed View
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HS2 CDE Retaining Structures – In Situ Concrete, Architectural Treatment
Plan Section
Patterned Concrete Detailed View
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HS2 CDE Retaining Structures – Embankments, Family of Types
‐ 8no Retaining Structures parallel with
track*
‐ Reinforced Earth Wall typically faces
existing NR track
‐ RC Wall typically faces back gardens in
Handsacre
* K1 & K2 Retaining Walls SIFT Options –
Feb 2015, based on HB Design
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HS2 CDE Retaining Structures – Embankments, Reinforced Earth Cladding
‐ Reinforced Earth Wall typically faces
existing NR track
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HS2 CDE
Handrails / Guardrails
(Within Civil Works only)
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HS2 CDE Handrails – Technical & Scope Requirements
‐ Kee-Klamp system is considered not acceptable
‐ Handrails will be within security fences and will not be
used by the public
‐ Fixed to concrete substrate
‐ Handrails on viaducts are excluded from this package
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HS2 CDE Handrails – Typical Locations: Underbridge Wing Walls
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HS2 CDE Handrails – Typical Locations: Underpass Wing Walls
‐ Noise mitigation achieved with earthworks and planting – not
included in CDE Scope
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HS2 CDE Handrails – Typical Locations: Footpaths leading to Footbridges*
‐ Noise mitigation achieved with earthworks and planting – not
included in CDE Scope
*there are 27 footbridges on the route
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HS2 CDE Handrails – Typical Locations: Above Tunnel Portals
‐ Noise mitigation achieved with earthworks and planting – not
included in CDE Scope
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HS2 CDE Handrails – Typical Locations: Stairs Adjacent to Bridges
‐ Noise mitigation achieved with earthworks and planting – not
included in CDE Scope
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HS2 CDE Handrails – Typical Locations: Culvert Headwalls
‐ Noise mitigation achieved with earthworks and planting – not
included in CDE Scope
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HS2 CDE
Handrails / Guardrails
Concept Options
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HS2 CDE Handrails – Concept Option: Rectangular Hollow Sections
‐ Noise mitigation achieved with earthworks and planting – not
included in CDE Scope
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HS2 CDE Handrails – Concept Option: Flat Baluster Sections
‐ Noise mitigation achieved with earthworks and planting – not
included in CDE Scope
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HS2 CDE Handrails – Concept Option: ‘Ball’ Type Balustrades
‐ Noise mitigation achieved with earthworks and planting – not
included in CDE Scope
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HS2 CDE Handrails – Concept Option: Fibre Reinforced Polymer (FRP)
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HS2 CDE Handrails – Concept Options: Summary
Image to be added
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HS2 CDE Handrails – Concept Options: SIFT Criteria
Construction
Feasibility
Aesthetics Vulnerability to
Vandalism
Maintainability Durability &
Reliability
Initial Capital Costs
Whole Life Costs Sustainability Adaptability to
Different Contexts
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HS2 CDE Handrails – Concept Options: SIFT Selection
Image to be added
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HS2 CDE Handrails – ‘Front of House’ Application (may be visible to public)
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HS2 CDE Handrails – ‘Front of House’ Application (Underbridge Wing Wall)
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HS2 CDE Handrails – ‘Back of House’ Application (unlikely to be visible to public)
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HS2 CDE Handrails – ‘Back of House’ Application (Culvert)
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End
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Atkins Ltd
Euston Tower
286 Euston Road
London
NW1 3AT
UK
+44 (0) 20 7121 2458
www.atkinsarchitecture.com