![]() Installing a groundwater relief/dewatering system to drawdown the groundwater levels (e.g., dewatering wells either interior or exterior to the building).Įach of the options above have advantages and disadvantages, and this paper does not discuss the selection process.Installing a watertight barrier and designing the foundation walls and slab to support the full design water pressure.The following three options, or a combination thereof, are typically considered for below-grade spaces: Therefore, the Architect sometimes is left designing it themselves or coordinating the system design, which can be extremely challenging.ĭetermining the appropriate overall approach for mitigating high groundwater requires consideration of the anticipated use of the space. Unfortunately, it is not always clear, which design discipline should lead the design efforts since the Plumbing Engineer of Record (EOR), Geotechnical EOR, Structural EOR, Civil EOR, or Architect, along with others, may be involved in the system design. Groundwater infiltration into these below-grade spaces, or worse, a buoyancy failure of the basement slab, can result in potentially costly problems to building owners and tenants, if not handled appropriately.įailure to adequately address the high groundwater conditions can lead to the disruption of building operations, damage to interior finishes, deterioration of structural and mechanical components, and potential interior air quality issues. Typically, these groundwater elevations fluctuate several feet, if not more, due to precipitation or tidal influences. Many buildings have enclosed below-grade spaces, which can either be exposed to permanent, temporary, or perched groundwater conditions.
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