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Densification of granular material (compaction) is often required in areas subject to vibrations such as earthquake loading or traffic movement. Compaction is executed during the construction phase of a project to avoid post construction settlements or liquefaction (the loss of strength of the granular material) during for example an earthquake. It improves the load-settlement behavior of the material, making it suitable to reduce foundation settlements of structures. 

All compaction methods make use of the same principle: introducing high local vibrations into the soil body. These high vibrations densify the granular material when larger than the interparticle resistance. As the vibration energy reduces with the distance to the vibration source, the effect of compaction is bound to physical limits depending on various parameters. In order to have a solution for each case, Cofra has three compaction techniques within its portfolio. Find out more by using the links in the overview below. 

Website Diagram Compaction Wide
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Our solutions

Cofra has the following compaction solutions within it's portfolio

CDC compaction for the movement of 13500 Ton bridge

A selection of our compaction projects

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CDC compaction for Gabon Fertilizer plant

We compacted 540,000m2 for the Gabon fertilizer plant in Gabon in 2013 using 3 machines.


CDC compaction for Antwerpen East port

We compacted 80,000m2 for the development of warehouses near Antwerpen, Belgium.


CDC compaction for New Cities project Kuwait

We have performed the ironing after Dynamic replacement and compaction of suitable areas for the new cities project in Kuwait. In total an area of 3,800,000m2 was compacted using CDC hammer in 2011.


CDC compaction for Barrow Island LNG terminal project

We have compacted the EMOF facility of the Barrow Island LNG facility at Barrow Island Australia in 2011. On a very remote location, under strict environmental regulations, we were able to compact 145,000m2 of reclamation.


CDC compaction for Khalifa port

We have compacted 3,800,000m2 for the construction of Khalifa port in 2010 using three CDC hammers.


CDC compaction for tank terminal Amsterdam

We have executed a soil replacement and compacted 40,000m2 for the construction of tanks in the Amsterdam harbour in 2009.