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Water Acting Only on Tension Crack

Water acting on tension crack only

The slip surface is fully dry (seepage is not possible); the GWT either intersects the tension crack or is aligned the terrain, the maximal value of uplift pressure is at the intersection of slip surface and tension crack.

Water acting on tension crack only

The value of uplift pressure u at the intersection of slip surface and tension crack is given by:

where:

γw

-

unit weight of water

ht

-

height of GWT above the line of intersection of slip surface and tension crack

The resulting compressive water force V acting in the direction normal to the tension crack is given by:

where:

γw

-

unit weight of water

ht

-

height of GWT above the line of intersection of slip surface and tension crack

φ

-

deflection of tension crack from vertical

The value of water pressure acting on the slip surface is equal to zero.

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