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Hydrostatic pressure:
Hydrostatic pressure is the pressure equivalent to
that centered on a surface by a column of water
of a given height. The height of water due to its
weight creates pressure on the lower areas
(referred to as
hydrostatic pressure).
This pressure can be significant where the water
table is near the surface or rises near the surface
during heavy rainfalls.
Water under this pressure will seek out any
breaches, especially areas of weakness ( i.e. the
terminations
and
transitions
between
components).
These below grade components need a much
better waterproofing system than the same
components above grade.
Hydrostatic Control System
END CHAPTER II