LIVERPOOL STREET STATION PLATFORM EXTENSIONS (GRIP 5-8 DESIGN & BUILD)
MTR Elizabeth Line
Our Client MTR Elizabeth Line needed a contractor to plan and construct extensions for platforms 16 and 17 at Liverpool Street Station, one of the busiest stations in London. These extensions were necessary to accommodate 205m Full Length Units (FLU) trains. Enable Infrastructure was for the project, which followed stages 5-8 of the Governance for Railway Investment Projects (GRIP) process, also involved decommissioning platform 18 as an operational platform. Due to the introduction of the new trains, the project had to be completed within a strict deadline.
The project
The scope of work included track modifications and adjustments to associated infrastructure. Enable Infrastructure played a crucial role in managing various subcontractors specializing in areas such as modular platform extensions, slab track installation, installation of roof-mounted overhead line equipment (OLE), and multidisciplinary design. Enable also effectively managed key stakeholders including MTR, Liverpool Street Station, Network Rail Aspro, Romford Rock, Greater Anglia, Crossrail Ltd, City of London Council, Transport for London, and Rail for London.
The challenge
- The physical works associated with this project were delivered over 2 main access windows during Christmas of 2020 and Easter of 2021, totalling 20 days (2 x 10 day windows). This project was also carried out during the Covid pandemic which made the project more logistically challenging.
- Logistically the works area at Liverpool Street Platforms were very difficult to access as the station remained operational during the delivery of our works. We were constrained by very short access windows, during which time materials and equipment were mobilised and demobilised from a track access point approximately 1 mile downtrack from the station.
- Strict requirement to meet the client’s programme end date.
- Need to manage multiple subcontractors working on specialist tasks.
- Multidisciplinary nature of the design development.
- Multiple Stakeholder Management.
The solution
- Enable Implemented a collaborative program that encompasses our client and all subcontractors through a unified planner, which efficiently gathers and consolidates information from all parties involved.
- Implemented a Covid action plan which assisted in the safe delivery of the project.
- Utilised Enable’s ten-week lookahead process ensuring that all parties were aware of all works and therefore allowing efficient allocation of resources.
- Adopted a practical approach to contingency planning. E.g. We avoided excessive allocation of activities in our possession. Consequently, the program had a float of around 10% – a position that our client acknowledged as a risk-mitigation strategy to meeting completion date.
- Enable applied specialist design expertise via subcontractors. Arup, a new GRIP 5 designer, lead the integrated GRIP 5 detailed design process. Rhomberg Sersa was selected for the IVES slab track design, while OSL handled the Solid-State Interlocking (SSI) Design. Additionally resonate was assigned the task of Integrated Electronic Control Centre (IECC) Scalable design, and Systra was responsible for the modular platform structure design.
- Utilised IVES slab track system alongside the integrated modular platform system was a innovative approach that resulted in significant cost savings for our client
- Enable built a Relationship Management Plan (RMP) as part of the Project Execution Plan to manage the key stakeholders. With the works being influenced by ISO44001, the experience has allowed Enable and our subcontract partners to deliver the works successfully on behalf of MTR Elizabeth Line and other external stakeholders.
The deliverables
- Site surveys
- Site set-up and enabling works
- Material deliveries
- Management of access and possessions
- Installation of IVES slab track system
- Installation of new switch & crossing (S&C) and Permanent Way modifications
- Installation of TSP platform extension access
- OLE modifications
- Signalling & telecommunications (S&T) modifications
- Mechanical & electrical (M&E) installations
- Civil works installations
- Decommissioning platform 18
- Testing and commissioning
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