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FLAC 2D dam drains

FLAC 2D dam drains

FLAC 2D dam drains

(OP)
Hi,
In first time sorry for my english, I'm from Spain.
Anybody has modelled the drains in a foundation of a gravity concrete dam?

I have do one case: Isotropic, not drains. The variation of pore pressure are linear. I havent any problem.
In the second case: Isotropic, with drains. The variation of pore pressure in the zone of drain are imperceptible. I have modelled the drains with a variation of the permeability. i.e: k=2e-11 in isotropic soil. k=2e-5 in the zone of drains.

Anyone know where is the problem?

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