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Exercise G - Reduction of Uplift Pressure by Draining
Objective
If we want to reduce uplift pressure but are not interested in reducing the rate of
seepage at the same time, the most convenient way to do it is by using a
downstream drain in the form of a tile line or a trench. In this manner, the flow lines
are drawn downwards and the uplift pressure is reduced or even entirely eliminated.
This can be easily demonstrated by modifying the outlet from the downstream pool
as in
Exercise D - Draining Effect of an Open Trench
, by employing the open trench
principle.
