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At a glance

Client/project partners: Crossrail Limited

Status: Complete

Location: London

CHt delivered the MEP systems for underground stations Tottenham Court Road (TCR) and Liverpool street (LIS), which each contain two ticket halls, two platforms (eastbound and westbound), two shafts containing the main MEP plant areas, interconnecting pedestrian tunnels, step free access and urban realm.

We also delivered the MEP for Custom House, an above ground station comprising the concourse, two platforms, and urban realm which included areas such as bridges linking the Excel Exhibition Centre and Docklands Light Railway (DLR).

In addition to the general MEP systems, a key part of our delivery was to provide the room and associated routes for systems procured by the client directly. This required careful planning to ensure the routes were completed in sequence. In total CHt delivered eighteen rooms which were required to be completed early to meet key milestones and included the development of strategies to maintain required conditions within each room.

At Liverpool Street (LIS) and Tottenham Court Road (TCR) we also installed twelve life safety ventilation systems with full PLC control, which connected to the tunnel ventilation systems and a control centre located in Romford. Multi-layered reliance to the electrical supply of dual supplies to each shaft, interlinks between shafts and links between the supplies all with the ability to be controlled remotely via Romford control centre.

Overcoming challenges and exceeding expectations

Our in-house digital engineering experts used digital tools including 3D modelling early on to provide all stakeholders with a detailed understanding of the project programme, interdependencies, and constraints. This was vital to maintaining the programme on this logistically challenging site and enabled CHt to complete our work within strict time restrictions.

Collaborative engagement

We developed a collaborative team culture with the client and the supply chain that was supported by co-location. Regular interactions included monthly project board meetings, bi-monthly joint safety leadership team meetings, weekly progress meetings, daily 30-minute action meetings. We worked together to solve challenges and prevent reoccurrence of issues.

Care and custody

CHt maintained a regime of care and custody from when systems were powered up or commissioned in accordance with an agreed care and custody plan. This has involved production of testing checklists and programme of maintenance inspections by our own team and/or specialist contractors. We maintained care & custody records which were issued to Crossrail on a monthly basis.