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GWT Above Slope Toe

Hydrostatic pressure, GWT above toe of slope

The slip surface is either entirely or partially below the groundwater table (water can not outflow from slip surface), the maximal water pressure is at the toe of the face.

Hydrostatic pressure on the slip surface

The value of water pressure u at the heel of the slope is given by:

where:

γw

-

unit weight of water

ht

-

height of GWT above the toe of the slope

The resulting compressive water force acting in the direction normal to the slip surface is given by:

where:

γw

-

unit weight of water

ht

-

height of GWT above the toe of the slope

α

-

deflection of slip surface from horizontal

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