Description:The rapid impact compaction technology is the modern approach for compacting existing soils that wou...
Update time:2022-12-26 14:20:22
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The rapid impact compaction technology is the modern approach for compacting existing soils that would otherwise be excavated and compacted using a conventional roller compactor in layers of 15 to 30cm.
Energy is transferred to the underlying loose granular soils rearranging the particles into a denser formation. RIC can effectively densify up to 4-5m of soils without excavation, adding water or dewatering. It can also be used for fill compaction, which can place in bulk fill materials and compact it accordingly without adding any water.
For large infrastructure developments, rapid impact compaction takes the lead due to its speed of execution that makes it much more cost effective than other alternatives.
Rapid impact compaction is a technique allied to Dynamic Compaction that can be used to increase the bearing capacity of soils through controlled Impact. The treatment is effective in the top layers of soil, typically up to 6m depth, though improvements up to a depth of 9m have been seen in some conditions.
Drop weights of 10 tonnes are used on our HC150 machines respectively and are dropped from heights of 1.2m – 1.5m onto a special foot assembly at 40 – 90 times per minute. The foot remains in contact with the ground at all times.
Control: the machine is accurately controlled from the excavator cab and the degree of compaction is electronically monitored,
Safety: the impact foot is in contact with the ground at all times and eliminates the risk of flying debris. Unlike conventional dynamic compaction, other activities can take place in close proximity,
Quality assurance: the impact energy and soil deflection are recorded by an on-board computer for presentation of compaction data to site managers. Results can verify work done to the client. The data can also highlight weak zones where extra fill is required, or zones where underground obstructions were present (eg. previously hidden old foundations),
Mobilisation: the RIC units are mounted on CAT 45 ton and CAT 85 ton excavators and can be mobilised within minutes of arrival on site,
Speed & cost: due to the fast ground coverage and the compaction efficiency, RIC generates a significant cost and time saving over conventional dynamic compaction methods with up to 75% cost and 100% time savings.
Rapid Impact Compaction is a shallow ground improvement and densification technique. This method densifies shallow, granular soils, which repeatedly strike an impact plate on the ground surface using a hydraulic hammer. The energy is transferred to the underlying loose soils and regroups the particles into a denser formation. The impact locations are located on a grid pattern and the spacing of those locations is calculated by the subsurface conditions and foundation loading and geometry.
Rapid impact compaction reduces liquefaction and seismic-induced settlement. This compaction involves lower levels of vibration with higher frequencies which are less damaging to existing structures, where dynamic compaction cannot be used.
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