EJPAU 2006. Sobolewski M. THE EVALUATION OF PLIOCENE CLAYS CONSISTENCY STATE WITH USING OF FLAT DILATOMETER TESTS

Electronic Journal of Polish Agricultural Universities (EJPAU) founded by all Polish Agriculture Universities presents original papers and review articles relevant to all aspects of agricultural sciences. It is target for persons working both in science and industry,regulatory agencies or teaching in agricultural sector. Covered by IFIS Publishing (Food Science and Technology Abstracts), ELSEVIER Science - Food Science and Technology Program, CAS USA (Chemical Abstracts), CABI Publishing UK and ALPSP (Association of Learned and Professional Society Publisher - full membership). Presented in the Master List of Thomson ISI.

2006
Volume 9
Issue 4/volume9

Topic:

Civil Engineering

ELECTRONIC
JOURNAL OF
POLISH
AGRICULTURAL
UNIVERSITIES

Sobolewski M. 2006. THE EVALUATION OF PLIOCENE CLAYS CONSISTENCY STATE WITH USING OF FLAT DILATOMETER TESTS, EJPAU 9(4/volume9), #45.
Available Online: http://www.ejpau.media.pl/volume9/issue4/volume9/abs-45.html

THE EVALUATION OF PLIOCENE CLAYS CONSISTENCY STATE WITH USING OF FLAT DILATOMETER TESTS

Mariusz Sobolewski
Department of Civil Engineering and Geodesy, Warsaw Agricultural University, Poland

ABSTRACT

The standard is that the consistency states of cohesive soils are evaluated on the basis of laboratory tests. This method is accurate, but time-consuming and expensive because of the necessity of sampling the soil specimens. Because of financial considerations, the investors decide to identify the geological conditions of a subsoil mainly on the basis of field research. Only in doubtful situations, when some weak strata or another disadvantageous factors in the zone of the interaction of a building are being occurred, the soil parameters are being verified through laboratory tests. The in situ tests are more popular, because they are fast and relatively cheap way to identify many parameters, including the liqudity index I_L.To evaluate the state of a soil, the formulas basing on the cone resistance q _c are used more and more frequently in piezocone tests CPTU [8]. In this paper, the flat dilatometer testing (DMT) is proposed to evaluate the consistency state of fine-grained soils. The paper presents the analysis of factors affecting the liquidity index I_L. The scaling of the flat dilatometer was carried out on the basis of I_L index, obtained from the laboratory tests. The investigation was made on the heavily overconsolidated Pliocene clays from Warsaw region.

Key words: Pliocene clays, liquidity index, consistency state, dilatometer tests.

Mariusz Sobolewski
Department of Civil Engineering and Geodesy,
Warsaw Agricultural University, Poland
Nowoursynowska St. 159
02-776 Warsaw, Poland
email: mariusz_sobolewski@sggw.pl

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