Mechanical, Electrical and Public Health (MEP) Engineering

The latter part of the Crossrail programme is characterised by installation of railway systems and building services. The design and installation of the Mechanical, Electrical and Public Health aspects of the scheme has been managed similarly to the Civil Engineering although contractors have had a larger role in the design process.

To ensure that the Contractors at each location produce their designs to a common theme, the Crossrail MEP Team have produced a series of Technical papers and guidance documents. These ensure best practice is followed with an emphasis on operability and maintainability.

From 2017 a greater proportion of papers presented to the Technical Papers Competition relate to MEP design and construction and the papers published here include key subjects such as uninterruptible power supplies, installing platform edge screen systems in proximity to overhead electrification equipment, and designing spaces and systems to avoid or cope with emergency situations such as fires.

MECHANICAL, ELECTRICAL AND PUBLIC HEALTH ENGINEERING DOCUMENTS:

Summary Publication date Document Type

CRL Station Platform Baggage Fire Size

Topic area: Mechanical, Electrical & Public Health

The Crossrail project (consistent with best industry practice) had a need to establish the ‘Design Fire Sizes’ for purposes of calculating various system/s (such as ventilation and fire suppression, detection etc) so that the characteristics and performance of such equipment can be specified in the design as adequa...

09/07/2018 Technical Paper

Earthing and Bonding

Topic area: Mechanical, Electrical & Public Health

The purpose of the case paper is to outline the Earthing and Bonding (E&B) principles and delivery on a complex subsurface metro railway project. The paper identifies how E&B is undertaken and delivered through the project life cycle. Its objectives are to illustrate the technical and programme challenges on th...

09/07/2018 Technical Paper

Engineering Design of the Platform Edge Screens for Crossrail’s Mined Stations

Topic area: Mechanical, Electrical & Public Health

This paper covers the engineering design of Platform Edge Screens for the five mined Crossrail stations in central London. Full-height platform edge screens are a signature feature of Crossrail’s mined station platforms, but are unprecedented in London’s tube and rail network. Consequently, their design pr...

09/07/2018 Technical Paper

Installation of rigid overhead catenary in Crossrail tunnels

Topic area: Mechanical, Electrical & Public Health

The Overhead Line Equipment works for the C610 Systemwide Main Works Project concerns the design, procurement of plant, materials and equipment, installation, testing and commissioning of the elementary system installed in the Crossrail Central Operating Section which includes new twin bore single track tunnels, interm...

09/07/2018 Technical Paper

Watermist Systems – Understanding the Technology

Topic area: Mechanical, Electrical & Public Health

The misunderstandings of a Watermist system during the initial stages of the Crossrail project and the subsequent designs produced which failed to meet the fundamental request to provide an engineered solution to the traditional sprinkler system leads me to explain the Watermist system in more depth. The following aspe...

09/07/2018 Technical Paper

Implementation of energy saving initiatives in design review

Topic area: Mechanical, Electrical & Public Health

This paper describes the design development work to the tender design in an attempt to cut down energy/ carbon emissions. Initiatives implemented include: Improve station power efficiency Use of LED Lights and lighting control Use of solar PV panels Combining small plant and reduced ventilation rates Heat recovery pla...

09/07/2018 Technical Paper

Performance benefits associated with elevated temperature set points and increased error deadbands for room temperature controllers

Topic area: Mechanical, Electrical & Public Health

This paper will mainly focus on the performance benefits from increasing the error deadband after research was conducted and results were obtained from a mathematical model. The model of a typical cooling application was used in the study to simulate the room temperature response of a signalling equipment room and a st...

09/07/2018 Technical Paper

Enhance the service reliability of safety critical mechanical installations

Topic area: Mechanical, Electrical & Public Health

Stair pressurisation, air release systems and platform smoke extraction system are the three safety critical mechanical installations in Crossrail stations, shafts and portals. The system control configuration for these installations are provided with power supply and motor control redundancies to meet Crossrail’s sy...

09/07/2018 Technical Paper

Lighting Design and Strategy for Stations, Shafts and Portals on the Crossrail Project

Topic area: Mechanical, Electrical & Public Health

Crossrail committed to providing full LED lighting across all Elizabeth line Stations, Shafts and Portals, this decision was based upon industry evidence that proved the benefit in reduction of energy consumption and maintenance and therefore a reduction in whole life costs. The required lighting levels for all Crossra...

09/07/2018 Technical Paper

Engineering design of the platform edge screens for the Elizabeth line’s tunnel stations

Topic area: Mechanical, Electrical & Public Health

This paper covers the engineering design of the platform edge screens for five Elizabeth line tunnel stations in central London. Full-height platform edge screens are a signature feature of the Elizabeth line’s station platforms, and their design presented many challenges. To gain maximum uniformity, the edge screens...

02/07/2018 Technical Paper

Rooms’ Mechanical Design Criteria

Topic area: Mechanical, Electrical & Public Health

This paper is unique in defining the mechanical criteria for all room types that could be anticipated to be accommodated in a station, shaft and portal. It clarifies the minimum room design environmental requirements, including temperature range, ventilation, and noise criteria for each room type. This provides a clear...

30/09/2017 Technical Paper

Use of Non-Metallic Materials in Ventilation Airways- a review of aerodynamic performance and material requirements

Topic area: Mechanical, Electrical & Public Health

A number of built enclosures in Crossrail stations, shafts and portals have been used for ventilation purpose. They are in the form of blockwork wall, spray concrete lining or reinforced concrete panels in plenums or airducts. Crossrail material and workmanship specifications for ducts and plenums and industry design, ...

30/09/2017 Technical Paper

Effective MEP design techniques and strategy for large subsurface metro projects

Topic area: Mechanical, Electrical & Public Health

This paper illustrates the challenges for any major large infrastructure subsurface railway project, to select and undertake a cost effective, manageable and optimum MEP design strategy across a large programme of work. The paper proposes methods to overcome such challenges which extend into procurement of MEP equipmen...

30/09/2017 Technical Paper

Compliance of Technical Assurance Requirements for MEP Installations at Crossrail Stations, Shafts and Portals

Topic area: Mechanical, Electrical & Public Health

This paper highlights the approach adopted by Crossrail to demonstrate compliance with technical assurance requirements for MEP installations at stations, shafts and portals. The common approach has taken into consideration the diverse nature of design and complexity of installation at different work sites. The documen...

30/09/2017 Technical Paper

Towards Integration of Engineering Services at Crossrail Stations, Shafts and Portals

Topic area: Mechanical, Electrical & Public Health

Construction of Crossrail is made up of discrete work packages for Stations, Portals, Shafts and Tunnels works plus a number of line wide railway system works (trains, tracks, signals, communication, power transmission, fare collection, platform screen doors and tunnel ventilation). A unique integration process was dev...

30/09/2017 Technical Paper

Information Management System to Handle Maintenance Alarms from MEP Installations at Crossrail Stations, Shafts and Portals

Topic area: Mechanical, Electrical & Public Health

Maintenance related alarms are captured by the station electronic data information systems and communicated to the appropriate reporting centres so that they can be recorded and responded to in a structured and timely manner. This will necessitate a clear definition of the alarms and precise location of reporting centr...

30/09/2017 Technical Paper

Mechanical Design Principles

Topic area: Mechanical, Electrical & Public Health

Every station, shaft and portal on a railway is different. There is no one place where the needs, aspirations, design criteria and all the dos and don’ts are captured. This report attempts to do that and could be adapted to any railway project. The report clarifies the minimum performance requirements for the design ...

30/09/2017 Technical Paper

Fixed Fire-Fighting Systems

Topic area: Mechanical, Electrical & Public Health

Due to the size and complexity of the new Crossrail transport system, providing a compliant BS 9990 fixed fire-fighting system has its challenges to provide and assist the fire brigade, as well as protection for emergency personnel. Crossrail require installation of a fixed fire-fighting system in all Central Stations ...

30/09/2017 Technical Paper

Control Narratives for Heating Ventilation and Air Conditioning System for Stations Shafts and Portals

Topic area: Mechanical, Electrical & Public Health

This paper provides a unique ‘one-stop-shop’ for generic control operating narratives for heating, ventilation and air conditioning systems that could be designed in a station, shaft or portal. It describes the minimum requirements for the operation and monitoring of the building services installations with automat...

30/09/2017 Technical Paper

Duty & Stand-by Arrangements for VRF and DX Cooling Systems

Topic area: Mechanical, Electrical & Public Health

Electrical equipment can generate heat. Certain rooms containing electrical equipment must be cooled to remove heat and ensure reliability of the contained equipment. Cooling systems are used to cool the rooms. Cooling of these rooms can be critical and a backup source of cooling (stand-by) may be required. Depending o...

30/09/2017 Technical Paper

The Application of Stair Pressurisation to Crossrail Stations, Shafts and Portals

Topic area: Mechanical, Electrical & Public Health

This paper reviews the design of the stair pressurisation and air release system used in the pressure differential system for protected areas designated for firefighting. They are referred to as firefighting shafts as defined in BS9999. Potential deviations from BS EN 12101 Part 6 are also discussed in this paper. Fire...

30/09/2017 Technical Paper

Protective Coverings to Services with Thermal Insulation

Topic area: Mechanical, Electrical & Public Health

This paper sets out a unique way of describing the extent of application of physical protective coverings to building services that have a thermal insulation layer applied. It describes pictorially a way to clearly understand and determine the extent of application. It describes a clear limit to the extent that protect...

30/09/2017 Technical Paper

What need for temperature control and ventilation to battery rooms?

Topic area: Mechanical, Electrical & Public Health

Battery Rooms require ventilation and a maintained temperature range. How can the ventilation rate and temperature maintenance be designed to the optimum? The paper proposes the minimum performance requirements for the temperature range and ventilation of rooms containing the batteries supporting Uninterruptible Power ...

30/09/2017 Technical Paper

How Will Rooms Operate on Loss of Mains Power?

Topic area: Mechanical, Electrical & Public Health

The purpose of this technical paper is to describe the rationale and the evidence used to assess why HVAC Systems should not be supported by Uninterruptable Power Supplies at Stations, Shafts and Portals. It discusses the resilience of the two independent electrical power supplies (A & B) and the requirements for a...

30/09/2017 Technical Paper

Effective Reliability, Availability, Maintainability (RAM) and Safety (S), Principles and Guidelines for Large Subsurface Metro and Main Line Projects

Topic area: Technical Assurance and Integration

This paper offers support and guidance on a major infrastructure subsurface railway project, to select and undertake an effective reliability, availability and maintainability and safety (RAMS) strategy. RAMS which forms part of systems engineering is an essential discipline and integrated in most railway undertakings....

09/07/2018 Technical Paper

Maintenance and Cost Analysis on Major Subsurface Rail Projects – Crossrail

Topic area: Technical Assurance and Integration

The purpose of this case paper is to highlight the maintenance and cost analysis principles on a mega subsurface metro railway project. The paper identifies how crossrail delivered the maintenance through the project life cycle. Its objectives are also to illustrate some of the technical and programme challenges on the...

09/07/2018 Technical Paper

Integration tests for Crossrail Station Services

Topic area: Technical Assurance and Integration

This paper describes the integration tests implemented for Crossrail Station Services. It describes a set of Test Scenarios, which enable through their completion to provide a consistent and effective schema, to ensure Crossrail works in an integrated manner. The scenarios were design to test the systems under numerous...

09/07/2018 Technical Paper

Crossrail’s Technical Papers Competition

Topic area: Civil Engineering

On a project the size and complexity of Crossrail there is much interest from professionals from all industries in learning how such a project implements new and innovative processes and different ways of working. To this end it was expected that employees and contractors would be requesting to deliver papers and journ...

13/03/2018 Micro-report

Repurposing of Grout Shafts

Topic area: Environmental Design

Crossrail investigated potential long term uses for the temporary grout shafts excavated to enable mitigation of ground settlement.  This micro-report and supporting documents explain the options that were researched, why they could not be implemented by Crossrail and recommends that future projects consider such repu...

31/10/2016 Micro-report

The Use of Shape Accel Array for Monitoring Utilities during Urban Tunnel Drives

Topic area: Civil Engineering

The protection of third party assets with reliable monitoring instruments is essential for the running of a successful urban tunnelling project. With a twin bore tunnel being excavated below the Ranelagh Sewer, in Paddington for the Western Tunnel drive of Crossrail, a reliable method was required to measure displaceme...

03/11/2014 Technical Paper

Royal Woolwich Arsenal – Crossrail Box Sewer Diversion

Topic area: Civil Engineering

In a unique arrangement Berkeley are collaborating with Crossrail Ltd (CRL) to deliver the Royal Arsenal Woolwich Station Box. In order to construct the Box initial ground investigation was required as well as site clearance and multiple utility service diversions. The most complex of the utility diversions was the div...

03/11/2014 Technical Paper

The Protection of the 400kV Cables at Pudding Mill Lane

Topic area: Civil Engineering

The ground movement assessment and associated mitigation measures for the National Grid Electric 400kV power cables at Pudding Mill Lane, has been the subject of extensive debate and analysis since the commencement of the Crossrail project. These power cables are very sensitive to ground movement and hence elaborate sc...

03/11/2014 Technical Paper