Drainage

Stobart Rail own and operates an extensive range of specialist drainage plant and equipment, allowing the Company to achieve the impressive productivity rates crucial for delivering high output within short possession times. In recent years, with the widespread floods that have affected the UK, projects are becoming more focused on prevention as opposed to repair. This proactive approach has played a positive role in helping to reduce the number of flooding issues an effective drainage system not only reduces the risk of flooding but can improve track and embankment stability.

Stobart Rail has undertaken all forms of railway drainage projects including the incredibly challenging  deep drainage required near Paddington Station.  This included the installation of new trackside drainage at Ladbroke Grove on the approaches to Paddington and the construction of a new 7m deep drainage outfall installed in the busy streets of West London. Another challenging project was the Chipping Sodbury Tunnel Flood Alleviation Scheme where the company also installed 885m of 800mm pipework and manholes, 5,650m of 600mm pipework and chambers, 850m of 300mm pipework and chambers and a twin track three bore concrete surround undertrack crossing.

Drainage Services

  • Remedial works: Repair, reconstruction and clearance of failing drainage systems.
  • New system installation: Design and installation of a wide range of new drainage solutions including: Cess drainage, 6FT drainage, siphons, UTX (under track crossing), embankment and cutting slope drainage and soakaways.
  • HP water jetting: Jetting of existing waste water pipelines, sumps and catchpits, including UHP concrete and root cutting.
  • Waste water pipeline installation: Design and installation of new waste water networks.
  • Balancing ponds: Enlargement of existing ponds and construction of new balancing ponds.
  • CCTV: Evaluating the condition of existing drainage systems and proving newly installed systems.

Stobart Rail has undertaken all forms of railway drainage projects including the incredibly challenging  deep drainage required near Paddington Station.  This included the installation of new trackside drainage at Ladbroke Grove on the approaches to Paddington and the construction of a new 7m deep drainage outfall installed in the busy streets of West London. Another challenging project was the Chipping Sodbury Tunnel Flood Alleviation Scheme where the company also installed 885m of 800mm pipework and manholes, 5,650m of 600mm pipework and chambers, 850m of 300mm pipework and chambers and a twin track three bore concrete surround undertrack crossing.

 

 

CASE STUDY - BOLTON LE SANDS

Network Rail carried out drainage works on the CG17 railway line near Bolton Le Sands near Lancaster. The works including installing drainage in the cess.

The site suffered from repeat wet bets and standing water which was causing track geometry faults leading to a potential track renewal. The new cess drain works allowed the area to drain sufficiently and prevent reoccurrence.

The new drainage works allowed a continued flowing system via the existing outfall catchpit located in the cess area adjacent to the south of Bolton Le Sands crossing.

The installation of the cess catchpits and trench were undertaken by road rail vehicles (RRVs). New bedding material and ballast was unloaded by the same RRVS.

Due to the cess drain trench proximity to the sleeper ends and the risk of affecting the track support zone, during the installation of the pipe the trench required continuous monitoring for any loss of stone. Any ballast that was lost from around the adjacent sleepers during the excavation was replaced.

The upgrades to the existing system involved installation of 6 No. new six foot catch pits at regular (30m) intervals which tied into the insitu catch pits, along with replacement of 166m of channel drainage within the cess with 5 No. new catch pits and associated HDPE pipework.

An environmental survey was conducted to ensure wildlife species in the area were identified. Measures were then incorporated into the programme to ensure habitat disturbance was kept to a minimum.

This project was successfully completed, with its objectives delivered safely, within budget and exceeding the expectations of the Network Rail.

  

CASE STUDY - BAMBER BRIDGE

The Bamber Bridge high priority drainage scheme was delivered by Stobart Rail under its Works Delivery Special Projects framework. Bamber Bridge is located on the FHR4 line which connects West Coast main line with Blackburn.

Stobart Rail was approached by Network Rail to solve the drainage problem at Bamber Bridge. Isolated wet beds and blocked pipework were contributing to track circuit issues along with track formation faults.

The main issue at the site was with the quality of the spent ballast. Compaction, contamination and migration of ballast was restricting drainage resulting in the pooling of rain water. There were several catchpits along the section with collapsed pipes which were also contributing to the flooding.

The works included receiving plant and materials, installation of catchpits and a new 6ft drain, as well as the monitoring regime that was implemented to Network Rail’s guidelines. The drainage works were undertaken utilising a disused siding to gain access to the infrastructure.

The work was completed during a series of night possessions by installing 10 new catchpits for 257m at the north side of the level crossing. The new design

provided an adequate solution to the drainage issues at the site.

The project delivery strategy was developed using inhouse expertise and successfully completed with its objectives delivered safely, on time and within budget.

This project was completed September 2015.