Naylor aids major hospital rebuild in the North East of England

Miller hps, a consortium comprising Miller Construction (UK) Ltd, in partnership with Guildhouse UK and Community Ventures (Management) Ltd,is currently undertaking a design and build contract from Gateshead Health NHS Foundation Trust at Gateshead Queen Elizabeth Hospital, Sheriff Hill, Gateshead. The contract, awarded through the ProCure 21+ Framework, will see the creation of a new £22 million Emergency Care Centre.

The 9,500 m2 Emergency Care Centre is a three storey new build, which will create a new focal entrance to the hospital. The lower ground floor will link through to the existing hospital and incorporate staff offices, changing areas and a retail opportunity which will enable the Trust to maximise on a commercial opportunity. Emergency Care will be located on the upper ground floor, comprising a nine pod formation with a central diagnostic pod – the formation being utilised will be reviewed as an exemplar model for emergency care across the UK. A 36-bed short stay ward, each with en-suite facilities will make up the third floor.  With future needs of the Trust in mind, the Centre is being designed with capabilities for further storey extensions in the future.

Miller is also involved in works on the hospital’s Maternity unit and for a new pathology centre covering Gateshead, South Tyneside and Sunderland. The £12 million development, which has been developed through a partnership between Gateshead, Sunderland and South Tyneside NHS Foundation Trusts, is proposed to be located in the former Gateshead hospital laundry and will see a strip-out of the existing building with the main structure being retained, providing part refurbishment and part new build.  The new centre will be home to a pathology ‘centre for excellence’ which will be supported by appropriate facilities at each of the neighbouring hospital trusts in Sunderland and South Tyneside. The laboratory will cover a variety of testing and is anticipated to conduct over 12 million tests a year, and will also feature a ‘hot lab’ for immediate test results.

CONSTRUCTION SUPPORT As part of the new build programme and refurbishment process there is a requirement for several sections of the hospital’s existing live drainage system to be re-routed/diverted prior to the construction of new foundations. Due to the sandstone nature of much of the substrata this required the use of rock breakers etc. Much of this work has been subcontracted to local contractor Meldrum Construction Services of Birtley.

As the new building works on the site and proximity to other building and services did not pose any technical problems, it was decided to complete the drainage re-routing works using open cut techniques with Meldrum utilising several excavators and trench boxes to provide the excavation and ground support systems including a Doosan 8t 360° Excavator, a Doosan 14t 360° Excavator, a Doosan 18t 360° Excavator, a Terex 820 180° Excavator and Mabey Hire Boxes. However, the sensitive location of the existing live drainage system in proximity to existing hospital buildings etc. meant that all the re-routing and excavation work that were associated with the construction programme had to be completed with as little disruption to the on-going workings of the hospital as possible.

Within this £3 million ground works package, Meldrum’s responsibilities and construction requirements varied depending on which part of the build project the sewer re-routing related to. The work involved the construction of both foul and storm water drainage systems with plastic and concrete pipes being used for the storm water systems and clay pipe being stipulated for the foul water sewers.

On the Emergency Centre itself as well as using 90 m of 225 mm diameter and 110 m of 300 m diameter Ultra Rib UPVC and 55 m of 450 mm diameter and 95 m of 375 mm diameter concrete pipes for the storm water installations, there was a requirement for 150 m of 100 mm diameter and 700 m of 150 mm diameter clay pipe work for the foul sewer. After careful consideration of the range of clay pipe available on the market, it was decided that the Densleeve vitrified clay pipe from Naylor Drainage Ltd offered the best solution for the installation.

Similarly on the Maternity unit site some 50 m of 100 mm diameter Naylor Densleeve pipe was utilised. On the Pathology unit site some 750 m of 100 mm diameter and 250 m of 150 mm diameter Densleeve pipe was used. A specific requirement on the Pathology unit site was that the pipework was required to offer a high degree of chemical resistance. Whilst this was not a problem for the pipe itself, as clay pipe has an inherent chemical resistance due to the raw materials used in the pipe, the joint collars needed to also offer this high chemical resistance. Therefore special Nitrile Collars, also provided through Naylor Drainage were used to complete the installations. All installations for the foul water systems were carried to current standards requirements.

NAYLOR DENSLEEVE The Naylor Densleeve underground clay drainage pipe system comprises plain-end vitrified clay pipes and fittings with flexible sleeve couplings. The Densleeve system was designed and developed for building drainage networks and associated sewerage. Densleeve is available in diameters including DN100, DN150, DN225 and DN300; in addition DN200 and DN 250 are manufactured for key export markets. All Densleeve products and fittings are manufactured to comply with the stringent requirements of BS EN295-1. When installed in general accordance with the Naylor Sitework Instructions the Naylor Densleeve system meets the latest technical requirements of the Building Regulations, BS8005 and BS8301.

Standard jointing for the Densleeve system is achieved using Sleeve Couplings that are manufactured using high impact polypropylene with elastomeric seals that provide watertight, flexible mechanical joint assemblies, which comply with BS EN295-1: System G. They will accept angular deflection and shear resistance without leakage, when tested under an internal or external water pressure of 50 kPa (5 m head of water). For more aggressive situations, Nitrile seals are also available for use in contaminated ground or where the chemical effects of effluent flowing in the new pipe might give cause for concern, as was the case for the Pathology unit installations on the QE Hospital site.

For pipe supplier Naylor Drainage Ltd Edward Naylor, managing director said: “Naylor clay drainage pipe has been used on a large number of major hospital schemes since the company was founded in 1890. The longevity and corrosion resistance of Naylor clayware pipe makes it an obvious choice for schemes where durability is a key consideration as on this project for the QE Hospital in Gateshead.”