A new method of estimating the ratio between in situ rock stresses and tectonics based on empirical and probabilistic analyses

This paper describes a new procedure for assessing the ratio between in situ stresses in rock masses by means of K ( K = σ H / σ v, being σ H and σ v principal stress) and tectonics for purposes of engineering geology and rock mechanics. The method combines the use of the logic decision tree and the...

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Bibliographic Details
Published in:Engineering geology 2008-10, Vol.101 (3), p.185-194
Main Authors: González de Vallejo, L.I., Hijazo, T.
Format: Article
Language:English
Subjects:
Applied sciences
Buildings. Public works
Decision tree
Earth sciences
Earth, ocean, space
Exact sciences and technology
Geomechanical index
Geotechnics
In situ stress
Logic tree
Probabilistic methods
Soil mechanics. Rocks mechanics
Tectonic stress
Tectonics. Structural geology. Plate tectonics
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Summary:This paper describes a new procedure for assessing the ratio between in situ stresses in rock masses by means of K ( K = σ H / σ v, being σ H and σ v principal stress) and tectonics for purposes of engineering geology and rock mechanics. The method combines the use of the logic decision tree and the empirical relationship between the Tectonic Stress Index, TSI, and a series of K in situ values obtained from an extensive database. The decision tree considers geological and geophysical factors affecting stress magnitudes both on the regional and local scale. The TSI index is defined by geological and geomechanical parameters. The method proposed provides an assessment of the magnitude of horizontal stresses of tectonic origin. Results for several regions of Europe are presented and the possible applications of the procedure are discussed.
ISSN:0013-7952
1872-6917
DOI:10.1016/j.enggeo.2008.05.003