13000
m² of access road and compond
t of aggregate imported
M33
Location
Challenge
Given the sites historical use as a power station, we developed a remediation strategy to deal with the made ground and pulverised fly ash, for approval by the relevant authorities prior to commencing the main platform works.
There was also an 8m level difference alongside the Manchester Ship canal that required a design and build solution. At the same time a new compound and access road was to be built. The project included: –
- Design and build
- 400m access road
- 10,000m² Car park and infrastructure for offices
- Remediation and processing of made ground
- Control of invasive species
- Reinforced earth embankment
- Earthworks
- Aggregate platforms
The enabling works were to be completed during the autumn and winter which would prove difficult given the volatile nature of the made ground.
Solution
An accelerated design and remediation strategy were sorted. All processing was completed ahead of the winter which allowed us to provide a structurally sound foundation where the required ground strengths were achieved.
The aggregate sub formations were completed during the winter months, which allowed the drainage, earthing, ducting and piling to commence on time.
The underlying ground strata proved a difficult obstacle in designing the embankment. A key concern in the use of traditional piling would have created pathways for potentially contaminated land to the canal and underlying aquafers. We were able to design a non-intrusive solution, introducing shear keys and aggregate to provide form the embankment.
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