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IMPROVING THE BEARING CAPACITY OF THE DIFICULT FOUNDATION GROUNDS USING THE METHOD OF RAPID IMPACT COMPACTION

Phd Student Oana-Laura Har, Phd Felicia Enache, B.Eng. Aurelian Gruin

Abstract

Considering that there are more and more situations where there is a need of building structures on low strength capacity grounds, we need to find efficient methods not only from the technic-economical point of view, but also from the time consuming point of view. The rapid impact compaction method is also an energy efficient method because there can be used any type of ground found in the site (gravel). The process itself itпїЅs the usage of a device that consists in falling weight of 5 to 9 tons from a controlled height onto a metal foot with a diameter of 1.5 m. After these droppings are done, some compaction foot prints are created and these are filled with ground from the site, granular material or crashed stone. In this paper, the way the properties of the ground were improved at some water tanks of a wastewater treatment plant is described. The layer of ground found in the site was formed by loose gravel and clay lenses in varying proportions. In order to observe this method efficiently, ground investigations were hold before and after the compaction, and the results were very good, allowing the direct foundation of the tanks. The final result consists in a high bearing capacity ground obtained in a short period of time, comparing with other compaction methods and nevertheless a cost and energy efficient method.

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DOI resolver: doi.org/10.5593/sgem2017/12/s02.057

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