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No Dig solution for new Swindon sewer development

Stanton Bonna’s jacking pipes provide an effective, long term sewer solution for Swindon’s sustainable urban extension.

The high profile development of Wichelstowe, an 800-acre site south of Swindon includes around 4,500 residential properties plus primary schools, community facilities and retail developments.

Thames Water awarded Optimise Joint Venture the Wichelstowe trunk sewer contract as part of their AMP5 programme of contracts. Optimise JV includes J Murphy, Barhale, Clancy Docwra and MWH.

A No Dig solution was needed to minimise disruption, as the new and existing sewer network ran under busy roads, the Cardiff to London high speed railway line, two small streams and a protected tree area.

As a Thames Water Framework supplier of jacking pipes, Stanton Bonna worked closely with Barhale on the new sewer system.

Stanton Bonna jacking pipes are the preferred choice as they are vertically cast to produce accurate joint surfaces with square faces and a strong high density concrete. They are provided with mild steel painted collars, or stainless steel collars are available on request.

Each jacking pipe also comes with an elastometric sealing gasket which ensures a watertight joint.

The Swindon Southern Trunk Sewer project involves installation of a new trunk sewer at depths of up to 10m below ground level.

Approximately 1400m of DN 1200 Stanton Bonna jacking pipes were supplied. They will help serve the southern part of Swindon and link to an existing trunk sewer which is around half way between the Wichelstowe development and the existing Swindon Sewage Treatment Works.

Mark McGeady, Site Agent, for Barhale Construction said “Ground conditions were

very good for our Iseki tunnel boring machine – it was mainly stiff clay and in some of the shallower areas we encountered coarse gravels.”

“Installation time for each jacking pipe ranged from 25min – 45min. The overall project was completed in 7 months.”

We were very happy with the product and progress. Service, delivery, product quality and communication were all good and helped us complete the job efficiently.”

Barhale highlighted the key benefits of using this system:

· minimum disruption with excavations for shafts every 120m+

· less excavated material and reinstatement required

· lower carbon footprint than open cut method

· reduced safety risk through minimised working in deep trenches

The new trunk sewer and upgrade to the existing sewer system will ensure increased capacity for currently overloaded sub-catchments and also future developments in the south east of the city.

Stanton Bonna jacking pipe has been used at many high profile projects including the London 2012 Olympic Park primary sewer.
For further information on No Dig solutions and drainage systems please contact Stanton Bonna today on 0115 944 1448.