The determination of hydrostatic pressure is an important element prior to the design stage. This is a basic factor in the choice of a waterproofing system. By definition, if hydrostatic pressure is present then waterproofing - not dampproofing - is required.
The determination of hydrostatic pressure is an important element prior to the design stage. This is a basic factor in the choice of a waterproofing system. By definition, if hydrostatic pressure is present then waterproofing - not dampproofing - is required.
Aspects demanding consideration regarding hydrostatic pressure include the intensity and duration of the pressure. This should be defined by a civil engineer and is important in consideration of waterproofing materials that are specified. Other issues that require clarification prior to design are if the pressure is continuous or intermittent and if the water is stationary or flowing.
The issue of hydrostatic pressure is extremely important in the design of waterproofing systems for several reasons. Hydrostatic pressure can have adverse effects on waterproofing systems if they are not properly designed or applied. Hydrostatic pressure can force membranes into voids in the concrete. Cracking in the concrete that occurs under flexural stress can rupture the membrane and create leaks.
Hydrostatic pressure can also force water into tie-rod holes, cold joints, and rock pockets. It can also turn minor imperfections into probable sources of leaks.
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