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INTERRELATION BETWEEN SOIL PROPERTIES DERIVED FROM GEOPHYSICAL TESTS AND GEOTECHNICAL LABORATORY TESTS

Mihaela Stanciucu, Adrian Diaconu

First published: 2017-06-20https://doi.org/10.5593/sgem2017/12/s02.060View metrics

Abstract

This paper presents the results of a complex investigation executed in Bucharest, Romania by both geotechnical and geophysical techniques. Soil structure has been explored through 20 geotechnical boreholes at maximum 60m depth, which provided hundred of soil samples. A comprehensive set of experimental data on subsoil from oedometer and direct shear tests are analyzed in order to determine the stiffness and strength parameters for cohesive soils. For sands and gravels, the stiffness and strength parameters derived from Standard Penetration Test, based on well-known relations. In the last decades downhole and crosshole seismic investigations have been used as common in situ practice in civil engineering projects in order to provide dynamic soil properties useful for earthquake design analyses, liquefaction susceptibility, or deformations of sustaining structures. Both geophysical techniques are sustained by international and national standards and supply small strain elastic parameters and moduli, that can be easily determined from the measured shear and compressional wave velocities. Based on two approximate relation formula of mass density as function of shear wave velocity, we compare the ranges of this parameter with those derived from laboratory tests.

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Publication details

Title
INTERRELATION BETWEEN SOIL PROPERTIES DERIVED FROM GEOPHYSICAL TESTS AND GEOTECHNICAL LABORATORY TESTS
Authors
Mihaela Stanciucu, Adrian Diaconu
Proceedings
SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 17th International Multidisciplinary Scientific GeoConference SGEM2017, Science and Technologies in Geology, Exploration and Mining
Publisher
STEF92 Technology
Year
2017
Pages
469-476
SWS Citekey
Stanciucu20172469476
ISSN
1314-2704
ISBN
978-619-7105-99-5
Language
en
Publication type
Conference Paper
Keywords
downholecrossholesmall strainelastic parameters.
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