Southend Pier Extension
Southend-On-Sea Council
Project Value:
£700,000Dates:
July – Sept 2021
Coming Soon
Overview
The purpose of the project was to provide structural support to the proposed toilet block and viewing gallery on Southend Pier. Due to the nature of the proposed toilet block that is intended to “sit” on the pier, the existing pier structure was considered insufficient to support the proposed load. The new toilet block sits on the same footprint as a previously demolished toilet block, the original structure was supported by timber cantilever beams which are deemed structurally insufficient; therefore a new steel structure was proposed.
The project was carried out on behalf of Southend-on-Sea Borough Council and is a part of the £2.5million capital investment into Southend-on-Sea’s pier head, following engagement with residents and visitors.
GPS MACS were awarded the works as Principle Contractor. The challenging site required detailed planning and precision execution, working alongside the Grade 2 listed Pier and 1.5km off the coast.
- Enabling works and mobilisation
- UXO survey and clearance works using our in house dive team
- Mobilise barges, plant and equipment from Port of Tilbury to site
- Set up site hoarding, access, services protection, and strip existing handrailing and walkway
- Site works to existing elements
- Install temporary works and complete modification works to existing steel and pile heads
- Site works for new elements
- 8 no. marine piles installation
- Installation of new and replacement steelwork
- Install new secondary steel, deck beams and floor plates
- Handover and demobilisation
- Reinstate decking, handrail and remove all plant, equipment from site
- Tow barges back to Port of Tilbury for demobilisation
Design
- Design of the marine piles and supporting steelwork
- Design of the bracing steelwork to replicate the existing Grade 2 listed structure
Construction
- Complete construction of the full scope of works
Project Management
- Obtain the necessary river works licences from the river regulators: Port of London Authority, Environmental Authority and the Marine Management Organisation.
- Management of delivery, from design stage through to construction and commissioning.
Engineering
- Stability analysis and deck loading analysis for the barges through our supply chain Red 7 Marine.
- Planned, supervised, and carried out all lifting operations on site
- Design and installation of temporary works, namely pile gates and access walkways
- Site engineering including quality assurance, setting out and surveying, drawings, coordinating works and planning of operations
Marine Logistics
- Precision positioning of the barges alongside the Grade 2 listed pier. Mooring barges used 4 point anchor system along with spuds for additional measures.
- Planned, supervised and carried out mobilisation of all marine plant to site. Including floating crane transfers.
- Delivery of material barges
- Works completed using support craft such as tugs and multicats
Other Projects
Nearshore / Inland Warerways
Working 1.5km off the coast of Southend on Sea
Subsea
UXO clearance from subsurface around the works area
Health and Safety
No accidents with 4375 hours worked across the project in a challenging location
Innovation
Leg Penetration Assessments and Geotechnical Review identified that the ground posed a significant risk of punch through of the Jack Up Barge legs. To reduce this risk, cyclic preloading techniques were adopted and all vibro piling operations were to be restricted if used. Careful selection of the JUB and operating weights was implemented without incident.
Heritage Assets
The new works implemented replicate the existing Grade 2 listed pier and seamlessly merge into the structure. All works installed without damage to the existing steelwork and decking.
Southend-On-Sea Council
Project Value:
£700,000Dates:
July – Sept 2021*Mobile Row*
Overview
The purpose of the project was to provide structural support to the proposed toilet block and viewing gallery on Southend Pier. Due to the nature of the proposed toilet block that is intended to “sit” on the pier, the existing pier structure was considered insufficient to support the proposed load. The new toilet block sits on the same footprint as a previously demolished toilet block, the original structure was supported by timber cantilever beams which are deemed structurally insufficient; therefore a new steel structure was proposed.
The project was carried out on behalf of Southend-on-Sea Borough Council and is a part of the £2.5million capital investment into Southend-on-Sea’s pier head, following engagement with residents and visitors.
GPS MACS were awarded the works as Principle Contractor. The challenging site required detailed planning and precision execution, working alongside the Grade 2 listed Pier and 1.5km off the coast.
- Enabling works and mobilisation
- UXO survey and clearance works using our in house dive team
- Mobilise barges, plant and equipment from Port of Tilbury to site
- Set up site hoarding, access, services protection, and strip existing handrailing and walkway
- Site works to existing elements
- Install temporary works and complete modification works to existing steel and pile heads
- Site works for new elements
- 8 no. marine piles installation
- Installation of new and replacement steelwork
- Install new secondary steel, deck beams and floor plates
- Handover and demobilisation
- Reinstate decking, handrail and remove all plant, equipment from site
- Tow barges back to Port of Tilbury for demobilisation
Design
- Design of the marine piles and supporting steelwork
- Design of the bracing steelwork to replicate the existing Grade 2 listed structure
Construction
- Complete construction of the full scope of works
Project Management
- Obtain the necessary river works licences from the river regulators: Port of London Authority, Environmental Authority and the Marine Management Organisation.
- Management of delivery, from design stage through to construction and commissioning.
Engineering
- Stability analysis and deck loading analysis for the barges through our supply chain Red 7 Marine.
- Planned, supervised, and carried out all lifting operations on site
- Design and installation of temporary works, namely pile gates and access walkways
- Site engineering including quality assurance, setting out and surveying, drawings, coordinating works and planning of operations
Marine Logistics
- Precision positioning of the barges alongside the Grade 2 listed pier. Mooring barges used 4 point anchor system along with spuds for additional measures.
- Planned, supervised and carried out mobilisation of all marine plant to site. Including floating crane transfers.
- Delivery of material barges
- Works completed using support craft such as tugs and multicats
Nearshore / Inland Warerways
Working 1.5km off the coast of Southend on Sea
Subsea
UXO clearance from subsurface around the works area
Health and Safety
No accidents with 4375 hours worked across the project in a challenging location
Innovation
Leg Penetration Assessments and Geotechnical Review identified that the ground posed a significant risk of punch through of the Jack Up Barge legs. To reduce this risk, cyclic preloading techniques were adopted and all vibro piling operations were to be restricted if used. Careful selection of the JUB and operating weights was implemented without incident.
Heritage Assets
The new works implemented replicate the existing Grade 2 listed pier and seamlessly merge into the structure. All works installed without damage to the existing steelwork and decking.