Cline Road, Guildford
A request was made by Guildford Borough Council housing for a retaining wall to be built to the rear boundary of a council property on Cline Road. The request was made after a tenant erected a new fence on an incorrect boundary line.
Engineer: Gordon Spencer
Client: Guildford Borough Council Housing
Contractor: SR Newman
Cost: £3,000
Completed: February 2008
Yvonne Arnaud Theatre access road, re-surfacing
The access road to the theatre had become brocken up and was dangerous for pedestrians and cyclists. A scheme was undertaken to re-surface and re-paint this section road which is owned by the council.
Engineer: Hanif Baksh
Contractor: SR Newman
Cost: £3800
Completed: July 2008
Drainage Improvements, Ash
A section of drainage infrastructure near the Wharf Road area in Ash had become inadequate and as a result was causing flooding to residents. A project was undertaken to replace a section of drainage pipe and construct a new land drainage grille
Engineer: Hanif Baksh
Contractor: J Britten Limited
Cost: £4500
Completed: July 2008
Carrington Recreation Ground, re-surfacing
Carrington Recreation Ground is owned and maintained by Ash Parish Council.
The ground includes a track along its northern boundary which is accessed from the Lysons Avenue roundabout. From this end the track is surfaced in tarmac for approximately half of its length and provides a dropping off point for parents taking their chidren to the school in Stratford Road, a recycling bank for bottles, paper etc, and a parking area for users of the recreation ground.
The remainder of the track is unmade and provides access to a scout hut and small car parking area at the Carrington Road end. The track connects to Carrington Lane but is gated off at the boundary to prevent the route being used as a rat run.
Ash Parish Council approached engineering services for assistance to improve the surfacing of the unmade section of the track, an area of approximately 1250m². The proposed scheme included to provide concrete edgings to both sides to retain the new surfacing and a relatively new surfacing process commonly known as retread.
The process of retread involves breaking up the existing surface (in this case) to a depth of 100mm but instead of disposing of the material it is left in place. A special machine then passes over the area mixing new bitumen binders into the material whilst it is still on the ground, some new aggregates can also be added if necessary. The final component of the machine grades the reconstituted material to the desired line and level after which it is compacted with a roller. The mixing and laying is all done in one single pass of the machine.
Clearly this process can only be used where the existing surface is composed of materials suitable for remixing. At Carrington Recreation Ground the materials were suitable but some additional material had to be provided to raise the levels sufficiently for drainage purposes.
The benefits of the retread process are that there is no spoil for disposal, so landfill is reduced as is the need for new material. From a financial aspect there is a substantial cost saving. Both disposal and provision of new materials are generally the biggest elements in the cost of ground works such as these.
Date: February 2008
Budget: £22,000
Engineer: Roy N R de Coverly
Client: Ash Parish Council
Contractor (edgings): S R Newman contractors Ltd
Contractor (surfacing): Colas Ltd
Engineering Services
Guildford Borough Council
Millmead House
Millmead
Guildford
GU2 4BB
Tel: 01483 444506
Fax: 01483 444511
Email: engineeringservices@guildford.gov.uk