Aspin Solutions for £100m Nottingham Resignalling Project
Client: Network Rail
Date/Duration: Completion 2013
A £100m project to remodel and resignal the busy Nottingham station and its approaches called in Aspin specialists to provide a range of solutions to help deliver the works on time and on budget.
The project involved laying nearly 10km of new track and the renewal of 39 points, as well as the installation of 143 new signals, with signage. Two level crossings were eliminated and two more converted to CCTV operation. Other significant works included track layout modifications with all four tracks between Mansfield and Nottingham West and East junctions made bi-directional plus modifications to the station which was closed for 37 days.
Aspin’s work for Network Rail as a principal contractor had to meet the project’s demanding deadlines and the scope of works was extensive. It included:
- Site investigations.
- Site-wide geological mapping.
- Design, supply and installation of signal gantries with recovery of all the old, redundant signalling structures and gantries.
- 100 speed sign foundations, cantilevers and LOC staging.
- Troughing for route renewals and signal sub structures.
- Design and installation of civils bases for DNO cubicles.
- Under road crossing (URX) under Colwick Level crossing for Western Power to route new cables.
Aspin drew on its wide range of skills, resources and equipment to compile a bespoke solution to meet the brief.
The requirements included Aspin’s geological ground analysis teams to determine the ground conditions and provide essential data for the optimum piling and foundations to support the structures. Over 100 vibro pile foundation designs were produced, multiple UTX designs as well as a 3 track cantilever design with integral CHS piled foundations and associated civils works.
With limited available ground space, and the need for a 13.25 metre span for the 3 track signal cantilever, thought to be the largest in the country at time of installation, a lattice truss construction was used. This ensured tight deflection limits were met as well as a neat, economical foundation that only needed five steel driven piles.
The sub and superstructure analyses were completed concurrently to save time and achieve the optimum pile set out, avoiding complex transfer frames. The structure is also fully OLE compliant plus each dropper cage has a gated access to eliminate the risks associated with open access hatches for improved safety.
The scope of Aspin’s work on this £100m project developed and expanded over two years as the breadth and depth of Aspin’s skills were used on different aspects of the project.
The Aspin works were delivered on time, on budget within the overall works programme and in close collaboration with the client’s project teams to achieve delivery on time to the programme plan. Aspin’s detailed planning also covered the need to protect existing structures including the station’s roof. One of the gantries needing removal actually went through the roof so it had to be taken apart in stages which avoided any damage and potential additional project costs.
As a leading provider of solutions for all sizes and types of rail industry projects, Aspin is selected for its ability to create bespoke programmes and can operate as a principal contractor or tier 2, as the provider of choice in partnership with leading infrastructure and construction specialists including Amey, Carillion, Balfour Beatty, Atkins, Morgan Sindall and more.
- Foundations & Piling
- Ground Investigation
- Groundworks & Earthworks