Brynmawr Gateway Arch
Location: Brynmawr, Heads of the Valleys, Wales
Client: Costain
Location: Brynmawr, Heads of the Valleys, Wales
Client: Costain
CapabilitiesCapabilities
- Bridges & Highways
- Geotechnics
- Structural Engineering
- Construction Method Engineering
- Temporary Works
- 3D Modelling & Detailing
- Specialist Lifting & Jacking
- Bridges & Highways
- Geotechnics
- Structural Engineering
- Construction Method Engineering
- Temporary Works
- 3D Modelling & Detailing
- Specialist Lifting & Jacking
SummarySummary
The Brynmawr Gateway Arch bridge is a 120m-span structure over the A465 dual carriageway at the Heads of the Valleys in Wales; an overpass providing access from the centre of the community to the school. The concrete deck is supported on steel girders, hung from a steel rectangular hollow arch, straddling the Clydach river valley.
Wentworth provided comprehensive assessments, covering all stages of construction, from formation of the lifting platforms, rock slope stability, foundation of the temporary trestle support towers, lifting phases and concreting of the deck, lifting of the arch sections, to the final phase of jacking and hanging of the deck from cables and unloading the temporary towers.
Wentworth team are proud to have been part of this scheme, implementing a key transportation link in the local community, integrated into the picturesque surroundings of the Valleys.
Wentworth provided comprehensive assessments, covering all stages of construction, from formation of the lifting platforms, rock slope stability, foundation of the temporary trestle support towers, lifting phases and concreting of the deck, lifting of the arch sections, to the final phase of jacking and hanging of the deck from cables and unloading the temporary towers.
Wentworth team are proud to have been part of this scheme, implementing a key transportation link in the local community, integrated into the picturesque surroundings of the Valleys.
The Brynmawr Gateway Arch bridge is a 120m-span structure over the A465 dual carriageway at the Heads of the Valleys in Wales; an overpass providing access from the centre of the community to the school. The concrete deck is supported on steel girders, hung from a steel rectangular hollow arch, straddling the Clydach river valley.
Wentworth provided comprehensive assessments, covering all stages of construction, from formation of the lifting platforms, rock slope stability, foundation of the temporary trestle support towers, lifting phases and concreting of the deck, lifting of the arch sections, to the final phase of jacking and hanging of the deck from cables and unloading the temporary towers.
Wentworth team are proud to have been part of this scheme, implementing a key transportation link in the local community, integrated into the picturesque surroundings of the Valleys.
Wentworth provided comprehensive assessments, covering all stages of construction, from formation of the lifting platforms, rock slope stability, foundation of the temporary trestle support towers, lifting phases and concreting of the deck, lifting of the arch sections, to the final phase of jacking and hanging of the deck from cables and unloading the temporary towers.
Wentworth team are proud to have been part of this scheme, implementing a key transportation link in the local community, integrated into the picturesque surroundings of the Valleys.
Delivering valueDelivering value
Wentworth carried out a rigorous technical review and certification for the construction scheme, covering the interfaces between the permanent works designer and the steelwork contractor and providing assurance to the client that all risks were adequately controlled. Following observations from Wentworth, modifications were made to the method and details to secure safe constructability.
Wentworth carried out a rigorous technical review and certification for the construction scheme, covering the interfaces between the permanent works designer and the steelwork contractor and providing assurance to the client that all risks were adequately controlled. Following observations from Wentworth, modifications were made to the method and details to secure safe constructability.
Key ScopeKey Scope
- Geotechnical assessment of lifting and assembly platforms, including the stability of rock slopes and the robustness of the foundation elements for the temporary towers.
- Combined 3D modelling of the permanent and temporary works and simulation of all construction stages for the deck and the arch installation, considering the environmental actions present in the Clydach valley.
- Independent checking of the details of the temporary steelwork (towers, bracing, bearings, transfer beams and jacking components).
- Provision of bespoke risk assessments and consultations on methodology, in collaboration with the designers and the steelwork erectors.
- Geotechnical assessment of lifting and assembly platforms, including the stability of rock slopes and the robustness of the foundation elements for the temporary towers.
- Combined 3D modelling of the permanent and temporary works and simulation of all construction stages for the deck and the arch installation, considering the environmental actions present in the Clydach valley.
- Independent checking of the details of the temporary steelwork (towers, bracing, bearings, transfer beams and jacking components).
- Provision of bespoke risk assessments and consultations on methodology, in collaboration with the designers and the steelwork erectors.
Key Challenges and Solutions:Key Challenges and Solutions:
- Coordination of multiple designer and checking parties: Wentworth undertook an overarching role as reviewer, supervising the development of the construction methodology and underwriting its safety, as per the client’s brief.
- Assessment of complex structures & interfaces: a detailed structural model was developed, to accurately simulate the interaction of the permanent elements of the deck and arch with the temporary substructures and validate the methodology developed for the construction, at each stage.
- Coordination of multiple designer and checking parties: Wentworth undertook an overarching role as reviewer, supervising the development of the construction methodology and underwriting its safety, as per the client’s brief.
- Assessment of complex structures & interfaces: a detailed structural model was developed, to accurately simulate the interaction of the permanent elements of the deck and arch with the temporary substructures and validate the methodology developed for the construction, at each stage.