SEGRO Logistics Park East Midlands Gateway (SLPEMG) is a 700-acre development with planning consent for up to 6 million sq ft of logistics accommodation. It is a Nationally Significant Infrastructure Project (NSIP).
The development also incorporates a 35-acre Strategic Rail Freight Interchange (SRFI) which will include a rail freight terminal capable of handling up to 16 freight trains per day, container storage and HGV parking.
SLPEMG is located adjacent to East Midlands Airport with direct access to Junction 24 of the M1, and with the rail terminal connecting to the Castle Donnington freight line which provides direct access to the UK’s major ports, the Channel Tunnel and other UK rail freight interchanges.
Geotechnical advisor from the very beginning
Hydrock was originally appointed in 2014 to deliver geotechnical design on the proposed site before the earthworks were tendered.
We subsequently novated to act as geotechnical designer and advisor for Winvic on the main site, rail terminal and rail embankment, and the substantial offsite highway and bridges work. We also acted for Buckingham Group on a bridge over the M1 and the new A6 Kegworth Bypass.
We designed the earthwork fill to ensure the site was ready for construction, checking and verifying all investigations and reports to ensure the quality met the requirements. In total this equated to 6 million m³ of material, half of which has been used in our design of the landscaped bund that screens the development to the south and west of the site.
Supporting rail, bridge, road and water infrastructure
Our geotechnical design of the earthworks and ground improvement works supported:
- 6 million m³ of earthworks cut to fill to prepare the site for development
- The rail terminal, including a 30m deep cutting adjacent to the A453 and East Midlands Airport
- 2.5km long rail embankment which has an 8m high geogrid reinforced face for 1km of its length, with a rail bridge
- A new integral bridge over the M1 for Highways England to support the new Kegworth bypass, for Leicestershire County Council
- Geotechnical design for the improvements to Junction 24A of the M1
- Re-alignment of A435 for Highways England with new roundabout to provide access to the development and the Kegworth bypass
- Re-alignment of the A50 and A50/M1 interchange, including improvements to Junction 24
- Integral, skewed bridge for the realigned A50
- A railway bridge
- Diversion of the Derwent Valley Aqueduct, serving 600,000 customers in the East Midlands, which was re-aligned to enable the new highway to cross over the aqueduct
To support the integral bridges, we designed the fill to a very specific design formula. The bridge on the A50 has a 45 degree skew, so to achieve this complex structure we designed the piles that will stop it from twisting.
We used a combination of ground improvement techniques for our work with Highways England that combined high energy impact compaction on cohesive made ground with the addition of vertical drains to make the removal of water more efficient.
Structural, civil and geotechnical design for the first development plots
Hydrock is also the geotechnical designer for the first four plots brought forward for development, two of which we are also acting on as the civil and structural engineer. In total this represents approximately 2.5 million sq ft of the overall 6 million sq ft of planned logistics space.
Our role has been to deliver the geotechnical design for the foundation and floor slab to ensure appropriate settlement ahead of the construction phase.