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Dieseko’s vibroflots successfully tested in Dubai
Dieseko’s vibroflots successfully tested in Dubai - vibro compaction at 45°C -
Dieseko successfully tested a series of vibroflots when densifying granular soil in Dubai at a temperature of approx. +45 °C.
In close cooperation with its client in Dubai, Dieseko conducted a number of tests in order to analyze the performance levels of its vibroflots in extreme circumstances. Vibroflots are commonly used for vibro compaction, a deep compaction technique for densifying granular soils, as well as for realizing stone columns.
Dieseko engineer Girt Clazing explains: “With vibro compaction, water under high pressure is jetted sideways and downwards from the vibroflot to assist with penetration. As the designed depth is reached, the ground water is reduced or switched off. When vibrating with an operating pressure up to 250 bar, loose particles are repacked into a denser state and the lateral confining pressure within the soil mass is increased. The vibroflot is incrementally raised as sand is put to the annular gap around the vibroflot. This process repeats at designated locations at the building site in order to realize the required compaction.”
The test configuration involved vibroflots V180 in combination with ICE 600 power packs. The parameters were extreme: realize a 800mm diameter column at a temperature of 45 °C. During the non-stop 30 minutes operating time, the completely hydraulic assembly remained well under 60 °C!
Clazing: “In advance, a survey on soil condition was conducted, as a reference. With the monitoring system of the vibroflot, the operator can exactly control the process: start, finish and overall time, depth of penetration, operating pressure. By interpreting the recorded data of the different test drillings, together with the soil survey, we got the most optimized configuration to do the job efficiently.” Vibro compaction with a vibroflot is possible up to depths of more than 60 meters. A vibroflot is normally suspended from a standard crawler crane. Real-time data from a single or tandem setup is displayed on the monitor and can be downloaded at any time to support service intervals and job reports.