Continuous Medusa DMT tests in a very soft clay
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The dilatometer test (DMT) has been shown very useful in providing a number of geotechnical parameters, in different types of soils. The test is regularly carried out every 20 cm, i.e., it is a discontinuous test. Therefore, its capability of detecting variations in the geotechnical profile is conditioned by the tests interval. The Medusa DMT, however, is able to provide continuous measurements of the A reading, thus providing a much better picture of the soil stratigraphy than the regular DMT. Medusa DMT tests have been carried out in a very soft clay deposit around Guanabara Bay, in Rio de Janeiro, and a detailed soil profile was obtained. A comparison was made with piezocone tests with dual pore pressure measurements (u1 and u2). The complementary characteristics of both types of tests have been demonstrated.