Environmental Engineering Reference
In-Depth Information
Table 3. Parameters to be considered in the classifica-
tion of pyroclastic massifs.
estaire Gepp, J., serrano, a. & Perucho, a. 2008.
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González de Vallejo, l.i., hijazo, T., Ferrer, M. &
seisdedos, J. 2006. caracterización geomecánica de
los materiales volcánicos de Tenerife, p. 40.
González-Gallego, J. 2008. clasificaciones Geomecáni-
cas (aplicación a Rocas Volcánicas). ii Jornadas
canarias de Geotecnia.
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tion and engineering properties of tectonically undis-
turbed but lithologically varied sedimentary rock
masses. international journal of rock mechanics &
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lyell, c. 1839. elements of Geology. london.
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cal properties of heterogeneous rock masses such as
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cas en roca volcánicas. Master en Mecánica de suelos
e ingeniería Geotécnica. ceDeX, Madrid.
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. Tomo 2.
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, eurock 2002. Funchal, 27 nov.
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2008. Resistencia y deformabilidad de piroclastos de
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Tacoronte, Tenerife.
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Parameter
importance
in-situ density
+++
Welding and overlapping
+++
alteration
++
Presence of water
+
Discontinuities
+
as in the previous section, the weight of
each parameter has to be carefully evaluated by
in-situ studies, supported by laboratory tests and
by studying historical cases.
4
sUMMaRY anD conclUsions
Volcanic rocks have different geotechnical behavior
of other rock types.
The use of geomechanical classifications must
be done carefully, paying particular attention to
their distinctive characteristics.
The behavior of the lavatic rocks depends
mainly on its discontinuities, both in its system
of fracturing as the presence of holes. it should
also be taken into account the great heterogeneity
present in these materials. The special morphology
of this fracture system makes specific indices must
be used to consider adequately.
The pyroclastic massifs are mainly dependent
behavior of the resistant characteristics of the rock
matrix and hence the use of existing geotechnical
classifications may not be suitable.
ReFeRences
Barton, n., lien, R. & lunde, J. 1974. engineering
classification of rock masses for the design of tunnel
support. in Rock Mechanics, 6 (4), pp. 189-236.
catane, s., orense, R. & Tsuda, n. 2006. effect of water
saturation on the compressive strength and failure
modes of the Diliman tuff. Unpublished.
