Case study: Dynamic Compaction, Momentum, Rainham

CLIENT:

Readie Construction

Scope of works:

GeMech were contracted by principal contractor Readie Construction to carry out ground improvement using the Dynamic Compaction method, to perimeter roads and yard slabs for a new commercial unit development on the Northern bank of the River Thames in Rainham. 

The ground conditions comprised of up to 10.0m of Made Ground (Silty Sandy Gravel), over Alluvial Clay & Gravel, with Chalk bedrock at depth.  

GeMech were employed to carry out dynamic compaction sufficient to ensure that maximum long-term settlement in the Made Ground was controlled to within 25mm, under an applied bearing pressure of 20kPa at surface level. 

The site was bounded to the North by an operational landfill site, with vibration limits of 50mm/s PPV imposed at the site boundary to avoid potential for damage to the landfill slurry containment wall.

34,430sq.m of Dynamic Compaction work was completed over a 68 working day period, at an average rate of 500sq.m per day, using up to a maximum of 2 rigs.

Technique:

Dynamic Compaction

Contract Value:

£938,955.90