What is defined as the pressure produced by the weight of liquid water against the foundation walls and slabs of a structure?

What is defined as the pressure produced by the weight of liquid water against the foundation walls and slabs of a structure?

• A. Hydrostatic head
• B. Atmospheric pressure
• C. Pneumatic pressure
• D. Seepage pressure

Answer: (A)

Hydrostatic pressure is the pressure exerted by a fluid at rest due to its own weight. When water surrounds or presses against foundation walls and slabs, the weight of the water column above any point creates pressure that increases with depth, described by p = γh (γ is the unit weight of water and h is the depth). This pressure is often referred to as hydrostatic head—the height of a water column that would produce that pressure. This concept is distinct from atmospheric pressure (air pressure on surfaces) and from seepage pressure (pressure caused by water seeping through soil, not just the weight of standing water). The pressure described in the question is hydrostatic pressure (hydrostatic head).

Hydrostatic pressure is the pressure exerted by a fluid at rest due to its own weight. When water surrounds or presses against foundation walls and slabs, the weight of the water column above any point creates pressure that increases with depth, described by p = γh (γ is the unit weight of water and h is the depth). This pressure is often referred to as hydrostatic head—the height of a water column that would produce that pressure. This concept is distinct from atmospheric pressure (air pressure on surfaces) and from seepage pressure (pressure caused by water seeping through soil, not just the weight of standing water). The pressure described in the question is hydrostatic pressure (hydrostatic head).