Due to the fact that the
estimation of the triaxial parameters is very important in any geotechnical
project, many attempts have become with the aim of their determination. In
spite of its relative simplicity, triaxial tests are time consuming, expensive,
and require a large number of well prepared (regularly shaped) rock specimens
and suitable testing procedures. For this reason, they cannot be easily
determined in rocks which are thinly bedded, highly fractured, weak, and so
indirect, fast, practical, easy and economical ways should be used such as the
correlation of them with some other characteristics which are calculated
easily. The aim of this study is to
apply correlation analysis to investigate the relationships between physical,
dynamic and mechanical characteristics and triaxial parameters for ultramafic
rocks. Thus, sixteen samples, taken from the western part of Othrysmt (ten samples) and the
Kallidromomt (six samples, central Greece), were tested and the
relations among the properties were described
by simple regression analyses. The
study reveals strong negative, logarithmic correlations between the effective
porosity and triaxial parameters (c, φ).
Positive, linear relationships are also indicated between wave velocities,
apparent cohesion and friction angle, while the increase of serpentinization
percentage causes decrease of the c, φ. Both
dry unit weight and Schmidt Hammer Values are logarithmically affected with c, φ. The point load strength
index and apparent cohesion and friction angle are strongly correlated by both
logarithmic and linear functions, but logarithmic trends present higher
determination coefficients.
Cite this paper
Diamantis, K. , Exarhakos, G. , Migiros, G. and Gartzos, E. (2016). Evaluating the Triaxial Characteristics of Ultamafic Rocks from Central Greece Using the Physical, Dynamic and Mechanical Properties. Open Access Library Journal, 3, e3214. doi: http://dx.doi.org/10.4236/oalib.1103214.
Diamantis, K. (2010) Engineering
Geological Properties of the Ultrabasic Rocks in Othrys and Kallidromo
Mountains (Central Greece). PhD Thesis, Agricultural University of Athens, Athens, 386.
Christensen, N.I. (1966) Shear-Wave
Vetocities in Metamorphic Rocks at Pressures to 10 Kbar. Journal of Geophysical Research, 71,
3549-3556. https://doi.org/10.1029/JZ071i014p03549
Ramana, Y.V., Gogte,
B.S. and Sarma, K. (1986)
Physical Properties of Indus Ophiolites from Kashmir Himalaya. Physics of the Earth and Planetary Interiors, 43, 104-122. https://doi.org/10.1016/0031-9201(86)90079-8
Escartin, J.,
Hirth, G. and Evans, B. (2001) Strength
of Slightly Serpentinized Peridotites: Implications for the Tectonics of
Oceanic Lithosphere. Geological Society of
America, 29, 1023-1026. https://doi.org/10.1130/0091-7613(2001)029<1023:sosspi>2.0.co;2
Marinos, P., Hoek, E. and Marinos, V. (2006)
Variability of the Engineering Properties of Rock Masses Quantified by the
Geological Strength Index: The Case of Ophiolites with Special Emphasis on
Tunnelling. Bulletin of Engineering Geology
and the Environment, 65, 129-142. https://doi.org/10.1007/s10064-005-0018-x
Ozsoy,
E.A., Yilmaz, G. and Arman, H. (2010) Physical,
Mechanical and Mineralogical Properties of Ophiolitic Rocks at the Yakakayi Dam
Site, Eskisehir, Turkey. Scientific
Research and Essays, 5, 2579-2587.
Diamantis,
K., Gartzos, E. and Migiros, G. (2014) Influence
of Petrographic Characteristics on Physico-Mechanical Properties of Ultrabasic
Rocks from Central Greece. Bulletin
of Engineering Geology and the Environment, 73,
1273-1292. https://doi.org/10.1007/s10064-014-0584-x
Mountrakis, D., Sapountzis,
E., Kilias, A., Eleftheriadis, G. and Christofides, G. (1983) Paleogeographic
Conditions in the Western Pelagonian Margin in Greece during the Initial
Rifting of the Continental Area. Canadian Journal of Earth Sciences, 20,
1673-1681. https://doi.org/10.1139/e83-158
Katsikatsos,
G., Migiros, G., Triantaphyllis, M. and Mettos, A. (1986) Geological Structure of Internal
Hellenides (E. Thessaly-SW Macedonia. Euboea-Attica-Northern Cyclades Islands
and Lesvos). IGME, Geol. and Geoph. Res., Special Issue,
191-212.
ASTM (2001) Standard Practices for Preparing Rock Core
Specimens and Determining Dimensional and shape Tolerances. American Society for
Testing and Materials, D4543.
ISRM
(2007)
The Complete ISRM Suggested Methods for Rock Characterization, Testing and
Monitoring: 1974-2006. Suggested Methods Prepared by the Commission on Testing
Methods, International Society for Rock Mechanics, Compilation Arranged by the
ISRM Turkish National Group Ankara, Turkey, 628 p.
Hoek, E. and Brown, E.T.
(1988) The Hoek-Brown Failure Criterion a 1988 Update. Proceedings of
the 15th Canadian Rock Mechanics Symposium,
Toronto, 3-4 October 1988, 31-38.
Hoek, E.,
Wood, D.
and
Shah, S.
(1992) A Modified Hoek-Brown Criterion for Jointed Rock Masses. Rock Characterization: ISRM
Symposium, Chester, 14-17 September 1992,
209-213.
Hoek, E.,
Carranza-Torres, C.T.
and
Corkum, B.
(2002) Hoek-Brown Failure Criterion— 2002 Edition. Proceedings of the 5th North American Rock Mechanics Symposium, Toronto, 7-10
July 2002, 267-273.
