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A Case Study on Soil Improvement with Rapid Impact Compaction (RIC)

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Document pages: 25 pages

Abstract: Soil treatment was utilized on numerousproduction sites to compact cohesion less formations, having the objective toincrease earth characteristics and decrease probable subsidence. Within thelast few years, Rapid Impact Compaction (RIC) has increased its attractivenessas a soil treatment method. RIC is an innovative dynamic compaction technique primarily used tocompact sandy soils where silt and clay contents are low. This work presents acase study of ground improvement using RIC and its suitability for site preparationearthworks. The RIC technique has been performed in an early site preparationwhich consists of a cut and fill contract for a mega project in the Kingdom ofSaudi Arabia. RIC is a process where loose subsurface soils are improvedthrough compaction with the utilization of successive impact blows from the topsurface. This project involves the compaction of the fill materials (with anaverage thickness of 4 m) and loose natural formations (averaging 4 m indepth). The objective of the soil treatment scheme is to increase the relativedensity of the soils (both fill and natural) to 85 . The usage of the RIC withinthe site preparation earthwork applications is possible provided the presenceof certain elements—specifically, granular materials and particles finer thannumber 200 sieve—do not exceed 15 . The RIC method proved to be cost- andtime-effective when utilized for filling compaction activities since it compactsconsiderable soil thicknesses with a single action from the top surface, andcan be used as an alternative to the traditional method of compacting fillformations in pre-determined lift thicknesses.

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