Civil Engineering Reference
In-Depth Information
1
.
0(
visc
and
rho
respectively in programming terminology), use Program 9.1 to
estimate the steady state mid-plane velocity.
(Ans:
u
=
3
.
75)
2. Use Program 9.3 to reproduce the Mandel-Cryer effect (see e.g. Lambe and Whitman,
1969, Fig 27.10), in which the excess pore pressures beneath the center of a uniformly
loaded flexible strip footing temporarily rise before they start to dissipate.
3. Use a trial and error approach with the example accompanying Program 9.4 in this
chapter to estimate the deviator stress loading rate that gives a failure load exactly
half way between the drained and undrained solutions.
(Ans: d
D/
d
t
≈
150 kN/m
2
)
2
.
17 gives
D
f
≈
References
Biot MA 1941 General theory of three-dimensional consolidation.
J Appl Phys
12
, 155-164.
Griffiths DV 1985 The effect of pore fluid compressibility on failure loads in elasto-plastic soils.
Int
J Numer Anal Methods Geomech
9
, 253-259.
Griffiths DV 1994 Coupled analyses in geomechanics. In
Visco-Plastic Behavior of Geomaterials
(eds. Cristescu ND and Gioda G). Springer-Verlag, Wien, New York, pp. 245-317. Chapter 5.
Kidger DJ 1994 Visualisation of three-dimensional processes in geomechanics computations. In
Proceedings of the 8th International Conference on Computational Methods and Advances in
Geomechanics
(eds. Siriwardane H and Zaman M). A. A. Balkema, Rotterdam, pp. 453-457.
Lambe T and Whitman R 1969
Soil Mech
. John Wiley & Sons, Chichester, New York.
Schiffman RL 1960 Field applications of soil consolidation, time-dependent loading and variable
permeability. Technical Report 248, Highway Research Board, Washington, D.C.
Smith IM and Hobbs R 1976 Biot analysis of consolidation beneath embankments.
Geotechnique
26
,
149-171.
