Case Study: GRIP 4-8 Signalling Design

The GWR programme called for greater capacity, faster, frequent and longer train services, and improved stations, with Network Rail describing it as: ‘the biggest investment in the Great Western railway since Brunel built it more than 150 years ago. To accomplish the transformation of the Great Western Main Line between London & Oxford, all the new and existing signalling infrastructure along the route needed to be controlled from a new Oxford IECC workstation, located at the Thames Valley Signalling Centre. Four new Westlock Interlockings were planned, along with 4-Aspect Bi-Directional Signalling, to achieve 25KVac immunity and facilitate the new fleet of high-speed IEP electric trains.

Case Study: GRIP 4-8 Signalling Design

Overview

THE PROJECT

Oxford Area Re-signalling Schere (OARS) Phase 1 – Great Western (GWR) Route Modernisation 2018

To accomplish the transformation of the Great Western Main Line between London & Oxford, all the new and existing signalling infrastructure along the route needed to be controlled from a new Oxford IECC Workstation, located at the Thames Valley Signalling Centre.

Four new Westlock Interlockings were planned, along with 4-Aspect Bi-Directional Signalling, to achieve 25KVac immunity and facilitate the new fleet of high speed IEP electric trains.

THE ROLE OF RSP

RSP was selected to produce the GRIP 4-8 signalling design work for a significant section of the GWR scheme: Oxford Phase 1.

THE TEAM

Signalling Designers, Signalling Design Verifiers, Signalling Principles Designer With Cre & Cem Roles.  All IRSE Licenced and with extensive experience in planning, designing & managing complex signalling projects.

SCOPE OF WORKS

PRODUCED

• Axle Counter Evaluator Long Plans, Cable Core Plans & Schematics – 17 ACES & 351 Axle Counter Heads
• Location and REB Power & Air-Conditioning Calculations
• Signalling & Data Link Cable Schematics
• 5 Location Area Plans
• TFM & Data Link Schematics – 7 Westlock TIF Areas & 4 CIP Areas

DESIGNED

• 7 Relocatable Equipment Buildings – NR Sizes 6, 7, 9
• 145 Location Cases – Full & Half-Size
• 14 Disconnection Boxes

PROVIDED

• Passive Equipment Provision for Oxford Phase 2
• Commissioning Design Cover and Support

STANDARD EQUIPMENT TYPES

AWS
Data Link, Points, & Signal Modules
Dorman & VMS Signals:
  • 2, 3 & 4 Aspect
  • Buffer Stop
  • GPLS & Position Light
  • Miniature, Standard & Junction Route Indicators
Patrolmans Lockouts
Clamplock, Hy-Drive
HW2121 & IBCL Points
Thales Axle Counters
TPWS
650, 110, 50 & 24V Power

THE GRIP PROCESS

Grip 4 – Single-Option Development
RSP planned the core document requirements for the scheme, based of the NR Scheme Plans

Grip 5 – Detailed Designed
RSP produced the detailed design, including the equipment layouts, calculations and wiring diagrams.

Grip 6 – Construction Testing Commissioning
RSP worked with Siemens, Amey and NR test teams to ensure the project was installed and commissioned successfully.

Grip 7 – Scheme Handback
RSP incorporated the installation and testing comments into the final record designs and records to NR.

Grip 8 – Project Close-Out
RSP carried out a project review to ensure that lessons learned and good practices were implemented on future projects.

THE RESULT

The Commissioning was carried out during a two-week blockade in July 2018. It involved the installation/alteration of 185 signals and 79 points, plus 351 new axle counters. RSP provided design support throughout this period and the area was successfully brought back into service with minimal test logs and no delays.

Comments: “a job brilliantly planned and superbly delivered.” Steve Hall Network Rail SPC Programme Manager’

ACHIEVEMENTS SUPPLIED

High quality, safety-conscious designs and expert advice DELIVERED Large volume of design work on time and within budget WORKED In partnership with several companies to achieve a positive outcome.

 

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Downloads

Further information about the project can be found here: https://www.networkrail.co.uk/running-therailway/our-routes/western/great-westernmainline/oxford

Watch Oxford Phase 1 Tackley REB being installed: https://www.youtube.com/watch?v=2Cq_EDZgfuY

 

Enquiries

For more information about these components, please send an email to enquiries@rsprail.co.uk or use the form below.

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RSP Rail love a challenge. If you have a complex project, work package or need Network Rail approved products, give us a call on 01752 969321 or email enquiries@rsprail.co.uk