Project Showcase
These are some of the current and recent projects undertaken by Donegan Civil Engineering throughout the UK.
Dewar Place Cable Tunnel, Edinburgh
Donegan Civil Engineering recently completed this project direct for Scottish Power in the centre of Edinburgh.
The works involved sinking a 6.00m diameter drive shaft approx 24m deep, as can be seen in this picture, a 6.00m diameter reception shaft approx 13m deep, and then constructing a 2.10m diameter segmental tunnel approx 200m in length with a 90m radius curve along the line.
The drive shaft was constructed within a communal garden in a residential area, with the reception shaft located within what will be a new electrical sub-station. The purpose of the project was to bring a new high voltage cable in through the tunnel to feed the new electrical sub-station.
Donegan procured a specially designed 'Roadheader Tunnel Boring Machine' for the project which involved tunnelling through dolerite sub-volcanic rock with strengths recorded of up to 190mpa.
Tewkesbury Drive, Lytham
St Annes
Donegan were appointed as the main contractor on this recent United Utilities project.
The scope of works included the construction of a 15.00m diameter shaft which was sank as a caisson, approx 15m deep, along with upsizing approx 250m of the local sewer network with pipes ranging from 300mm to 750mm diameter followed by the abadonment of the existing sewers.
The shaft was then converted into a detention tank which would store storm water during times of heavy rainfall to prevent flooding of the local area and take a total of 11 local homes off the flood register.
Finally a permanent grass paving system for HGV access was laid accross the entrance and around the new underground detention tank.
Arnold Close, Dukinfield
This project was undertaken direct for United Utilities to take 4 local properties off the flood register.
Donegan constructed a 10.30m shaft by underpinning, approx 6m deep, within the local golf course and replaced approx 550m of both surface and foul water sewers, ranging from 225mm upto 1200mm diameter, online down small residential roads.
There was also a 450mm diameter augerbore approx 30m length under the entrance to the golf course club house to reduce any disruption.
To prevent disruption to the local residents and primary school during the working area was kept to a minimum as it progressed up Tennyson Avenue.
Cookesmere Lane, Sandbach
Donegan were appointed as the main contractor on this recent United Utilities project.
When completed the scheme would take a total of 18 houses in the local area off the flood register.
The works included the construction of a new 6.00m diameter shaft which would act as a foul sewage detention tank / pumping station and a 4.00m diameter CSO chamber incorporating a powered screen.
There was also approx 165m of 525mm and 450mm on-line sewer replacement both in the residental roads and from the new CSO through an adjacent field to an outfall into a local water course.
After the main construction works were completed and the new system was operational the existing pumping station and CSO were demolished, then a permanent grass paving system for HGV access was laid accross the entrance and around the new underground detention tank.
Newlands Court, South Shields
This project was carried out for Seymour Civil Engineering Contractors, on a Northumbrian Water project.
A 25.00m diameter shaft was underpinned to a depth of approx 12m in good firm clays and would provide over 4,000m3 (4 million litres) of foul water storage capacity.
Once excavation had reached formation level and all the rings had been built grouted and caulked a mass concrete plug was poured.
Once the concrete in the plug had cured the steel reinforcement was installed for the concrete base slab, with starter bars protuding for the 4 no. concrete support columns, as shown in the picture on the right, for the pcc cover slab.
Darwen WwTW & Clarence Street UID's
, Lancashire
This project was carried out by Donegan Civil Engineering direct for United Utilities.
The scope of works involved the construction of a 15.00m diameter shaft, sank by caisson, approx 15m deep which will act as a detention tank / pumping station with over 1,000m3 capacity for foul water.
The detention tank was then fitted out with 2 storm pumps and a scavanger pump that would feed into a set of twin 200mm diameter rising mains approx 200m in length.
Also a 12.50m diameter shaft was underpinned, to a depth of approx 10m, around an existing 4.00m diameter tunnel to act as an CSO chamber within which a powered screen was installed.
There was also approx 500m of opencut gravity sewers ranging from 450mm to 750mm diameter upto a depth of 4m, along with a number of manholes, insitu RC chambers and finally an outfall structure that was built within the embankment of the river.
Croes Atti, Flint, Wales
This project was carried out for Costain, on behalf of Welsh Water.
Shown in the picture on the right is the 1200mm internal diameter ISEKI TBM about to undertake a 40m pipejack crossing underneath the Chester-Holyhead Railway Line.
To carry out the crossing a 6.00m diameter drive shaft, approx 8m deep, and 4.00m diameter recption shaft, approx 7m deep, were constructed either side of the Chester-Holyhead railway line in difficult ground conditions comprising very wet clays with large boulders.
Courtaulds Sewer, Preston
This project was carried out on behalf of Balfour Beatty, for United Utilities.
The aim of the works were to fix part of the damaged existing foul sewer which was flowing into the River Ribble after the bank had collapsed.
It involved the stabilisation of a bank on one side of the River Ribble with over 400m of pre-driven permanent steel sheet pilling, re-construction of over 400m of the sewer system and new cycle track / pedestrian walkway.
Paradise Stre
et, Liverpool
This project was carried out for Laing O'Rourke on the major development works in Liverpool city centre.
The Contract included the insitu 3m x 3m reinforced concrete culvert works approx 200m in length carried out along the central reserve of Strand Street, Liverpool within a sheet piled trench.
Upperpassmonds Road, Rochdale
This project was carried out on behalf of Balfour Beatty, for United Utilities.
It involved the sinking of a 10.30m diameter segmental shaft, together with approximately 200m of pipework and associated manholes within the highway. The scheme also included some 50m of augerboring.
Brunswick Road, Altrincham
This project was carried out on behalf of Balfour Beatty, for United Utilities.
The project was a flood prevention contract, and the photographs show the construction of a 15.00m diameter shaft which will act as a storage tank in times of heavy rainfall.
You will note that the upper part of the shaft is supported by pre-driven steel sheet piles. This method was employed due to the anticipated unstable ground conditions within the top 9.00m depth of the shaft.
Crow Lane, Chesterfield
This project was carried out in partnership with E.T.M. for Yorkshire Water.
The Contract included the sinking and construction of a 15.00m diameter shaft to a depth of approximately 25 meters.
Langdale Way, Frodsham
This project was carried out on behalf of Balfour Beatty, for United Utilities.
The Contract included the sinking and construction of a 20.00m diameter shaft approx 17m deep, and a 9.00m diameter shaft approx 10m deep, within the playing field of a primary school.
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