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APPLICATION OF MEDIUM AND HEAVY DYNAMIC PENETRATION TEST FOR ASSESSMENT OF RELATIVE DENSITY OF FLUVIAL GRAVELS
Abstract
The determination of the physical and mechanical parameters and properties of the soil is an important part of the design of geotechnical structures. The soil characteristics can be specified by laboratory or field testing. In Slovakia, one of the common field tests, used for determination of the soil characteristics during the engineering geological investigation, is the dynamic penetration test. In 20th century, the dynamic penetration test passed through substantial development and simultaneously, the correlations between the test results and soil properties were established. At present, in general, there exist various types of dynamic penetration test sorted according the weight of the hammer. But, the most used test in the field is heavy dynamic penetration. Therefore, the most correlations were derived primarily for this type of test. The heavy dynamic penetration is still popular in Slovakia, but in addition to this test, light and medium penetration test are put in the practice. For this reason and because of the lack of correlations for light and medium dynamic penetration, it is necessary to analyze the suitability and applicability of existing correlations for other types of the penetration test. Hence, this article discusses the available correlations for the determination of relative density of fluvial gravels. Furthermore, the article is focused on the assessment and comparison of the relative density of Danube gravels derived from the results of medium and heavy dynamic penetration.
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