ISSN:
1420-9136
Keywords:
Poroelasticity
;
geophysics
;
hydrogeology
;
seismicity
;
Biot theory
;
barometric loading
;
tidal loading
;
undrained compression
Source:
Springer Online Journal Archives 1860-2000
Topics:
Geosciences
,
Physics
Notes:
Abstract The constitutive equations of poroelasticity contain four static moduli. Different sets of moduli are reviewed in the context of their laboratry measurement and their geophysical applications. One complete set consits of the drained bulk modulus and Poisson's ratio, and their undrained counterparts. Skempton's coefficient (ratio of pore pressure increment to mean stress increment under undrained conditions) and the Biot-Willis parameter serve equally well for the undrained bulk modulus and Poisson's ratio, because they permit the drained and undrained moduli to be related to each other. Time dependence is introduced into poroelastic behavior through Darcy's law. Geophysical applications that can be approximated by undrained conditions (fast loading) include seismicity, tidal and barometric loading, and tectonic compression. Several of these problems are most directly formulated in terms of Skempton's coefficient, undrained Poisson's ratio, and hydraulic diffusivity.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00998332
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