Performance evaluation of CDC compaction for warehouses: a case study of European projects
Performance evaluation of CDC compaction for warehouses: a case study of European projects
In recent years, Cofra Dynamic Compaction (CDC), a heavy Rapid Impact Compaction (RIC) technique, has been increasingly used worldwide to compact granular subsoils prior to the construction of, for example, warehouses, reclamations, hotels, wind turbines, and infrastructures. This paper provides an overview of the test results and final work methods with a focus on the compaction design for two projects. The discussed case studies include a touristic complex project located in Portugal and a terminal project in the Netherlands. Each project required, due to their own particularities, a specific work method and monitoring of the compaction activities. In all cases, the improvement of the subsoil conditions beneath the surface and foundation elements was necessary to ensure either sufficient bearing capacity while reducing total and differential settlement of shallow foundations and floor slabs or to ensure homogenization of the areas for future use. Ad hoc detailed designs were prepared to ensure that different structural elements were treated individually to meet the project requirements. Compaction efforts were constantly monitored using a GPS-based crane monitoring system to assess the effectiveness of the compaction method and adapt compaction energy where necessary. The observational method used during the compaction operations proved to be a valuable tool to optimize production but also to improve the result of the compaction works. Verification of the compaction effort was achieved by means of pre- and post-compaction CPTs, and the requirements were checked in accordance with Eurocode 7.
C. Guglielmelli; Jeroen W. Dijkstra
18th European Conference on Soil Mechanics and Geotechnical Engineering (ECSMGE2024)
D - Current and new construction methods
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