Civil Engineering Reference
In-Depth Information
Figure 7.7
Coupled seepage flow and stress-strain analysis
The analysis starts with the calculation of the initial state, which is characterized by the
parameters of the rock mass and the discontinuities. The water level is assumed to be
located at the ground surface. In a seepage flow analysis the hydrostatic uplift {F
U
} is
calculated. In a subsequently conducted stress-strain analysis, stresses and strains due
to the self-weight of the ground {
} and {F
U
} are calculated (Fig. 7.7, upper left).
Then the construction of the dam is simulated, accounting for the self-weight of the
dam {F
G
} and the ground {
γ
}, the water force {F
W
} of the impounded water reservoir
acting on the dam, and the seepage forces {F
S
} and the hydrostatic uplift {F
U
} acting
on the ground. The stages of construction can be simulated by means of several steps of
stress-strain analyses. For simplicity, in Fig. 7.7 the construction of the dam is simulated
by only one step of analysis.
γ
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