Timber Heading at Seaborne Library, Chester University. M230

Client
Graham

Project
An extension to the Seaborne Library at the University of Chester

Description

timber heading

An extension to the Seaborne Library at the University of Chester. The new two-storey extension includes internal reconfiguration, refurbishment, minor demolition and diversion/replacement of Mechanical & Electrical services to create new circulation space, communal areas and office accommodation. During the construction works a defective DN150 drain was discovered than runs below the existing building. Diversion of the drain around the perimeter of the building was impractical. Graham approached us to offer advice on a trenchless replacement. Very confined working areas, the ground conditions and existing underground services were considered carefully and resulted in a timber heading solution. We produced the permanent and temporary works designs and following client approval we undertook the construction works.

Following the preparation of access roads and hard standings we constructed the 5m deep drive pit. A 15m long timber box heading was constructed from the drive pit, below the occupied building and along the line of the existing drain. The new pipe was laid in the heading that was then backfilled with foamed concrete. An additional 5m long heading was installed to connect to an existing manhole. A new manhole was constructed and followed by backfilling and reinstatement to complete the work.

Ground Conditions were MADE clayey overlying stiff CLAY overlying weak SANDSTONE.

Study Project Date  
Culvert Replacement at Lund Terrace FAS, Ulverston UTX, Cumbria. M240 03/04/2017
Grounting of redundant Fuel Pipelines, Fradley Junction, Staffordshire. M223 05/12/2016
Timber Heading at Seaborne Library, Chester University. M230 15/11/2015
Culvert Replacement and Repair at Ferryhill. M228 07/09/2015
NGN Grouting of Vacant Sleeve Annuli. M223 09/03/2015
Culvert Refurbishment at Shaw Brook. M220 02/03/2015
Culvert Repair at Winnings, Newcastle upon Tyne. M211 16/06/2014
Culvert replacement at Ellergill Culvert UTX, Nethertown, Cumbria. M197 02/09/2013
Culvert Replacement at Willowburn, Alnwick. M195 01/07/2013
Culvert works at Jepsons Clough, Horwich, Bolton. M189 04/02/2013
Culvert Repairs at Millfield Lane, Walbottle, Newcastle upon Tyne. M186 02/07/2012
Culvert Replacement at Antley Syke, Accrington. M182 29/06/2012
Culvert Repair at Harwood Brook, Great Harwood - Manholes B2 to B3 relining. M165 30/11/2011
Culvert Refurbishment at HIRPS, Hockery Brook, Hindley. M171 01/04/2011
Culvert Repair at Harwood Brook Culvert Lining and retaining wall, Great Harwood. M165 31/01/2011
Culvert Repair at Riley Lane, Kirkburton, Huddersfield. M152 30/04/2010

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