Following the successful completion of ground improvement works on the previous phase of this Hinckley Park (Leiceistershire) logistics development in 2019, Winvic approached Menard to find a cost-effective foundation solution for the new phase of the works, comprising 3 warehouse units covering more than 40,000 m² in total. This prospective development had to be designed to a FM2 specification to support a uniformly distributed load of 50 kPa, whilst the frame brought point loads of up to more than 3,000 kN SLS. The settlement criteria were specified to 25 mm of residual settlements, with relative differential settlements limited to 1/600.
The initial site investigation revealed the presence of very soft to soft clay of the Oadby Member down to about 2 to 5 m (with CPT cone resistance as low as 0.5 MPa in some instances), above firm and stiff clay (Oadby Member) interbedded with some layers of dense sand and gravel (Wolston Sand and Gravel). The Mercia Mudstone bedrock was encountered at depth. The cut & fill works carried out prior to Menard’s intervention on this sloped site included the installation of up to 3 m of fill consisting of in-situ lime-treated material placed in layers. The characteristics of this upfill have been checked by additional site investigation using Cone Penetration Tests (CPT).