The application of Roller Dynamic Compaction (RDC) on former Landfill and Backfilled sites has increased over recent years in the UK. There is an increasing need for civil engineers to provide cost-effective solutions for construction on marginal or difficult sites.

JJMac RDC will reduce the impact of Settlement and Compression of poorly and uncompacted backfill when redeveloping the sites.

Compaction is a common ground-improvement technique that aims to increase the density of soil by applying mechanical energy to increase soil strength and decrease settlement beneath the ground surface.

Rolling Dynamic Compaction

RDC involves towing a non-circular roller with a tractor. As the non-circular roller rotates, it imparts energy to the soil as it falls to impact the ground.

HEIC - High-Energy Impact Compaction,
HIEDC - High Impact Energy Dynamic Compaction

These are alternative names found in different parts of the world, or used by different contractors for RDC.

Level changes via Heat Map

When compared with circular drum rollers, RDC can compact thicker layers due to a greater depth of influence beneath the ground's surface. This is mainly due to the shape of the roller drum, weight of the roller and ground speed. Typically in the range of 9–12 km/h

Depth of Dynamic Compaction Influence

The depth of influence of RDC is often quantified by comparing in-situ test results before and after compaction. JJMac will carry out a Topographical survey of the area to be compacted prior to compaction works. Once the compaction works are carried out, we will carry out a second Topographical Survey and compare both sets of levels.

Extensive knowledge, professional equipment and experience

ROLLER DYNAMIC COMPACTION

Rolling Dynamic Compaction

Level changes via Heat Map

Depth of Dynamic Compaction Influence