Rapid Impact Compaction (RIC)

Rapid Impact Compaction/Rapid Dynamic Compaction (RIC/RDC) is a technique similar to Dynamic Compaction and can be used to increase the bearing capacity of weak soils through controlled impact energy being transmitted through a pad.

RIC/RDC is effective for compaction of upper layers of ground typically up to 5 to 7m depth and in some cases up to 9m deep depending on soil properties. A weight of 5 to 16 tons is lifted using a hydraulic jack and then allowed to fall onto a special pad assembly that remains in contact with the ground throughout this process. The rate of impact is 30 to 60 blows per minute which results in immense energy transfer to the ground in a very rapid manner.





Using this technique, it is possible to compact most granular fills and certain silts, the best results being achieved when the soil comprises of well-graded particle sizes with fine content not more than 15%. This method can be used for in-situ soils as well as for compaction of fills for embankment construction.


• The impact pad is always in contact with the ground thus eliminating the risk of flying debris so other activities can take place in close proximity without any safety risk.
• The impact energy and soil settlement are recorded by the onboard computer for processing and presentation of compaction data. This helps in assessing accurately the degree of compaction achieved.
• Mobilization and production are much fast than is possible using other techniques.