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DTSTART;TZID=America/Chicago:20260918T091500
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DTSTAMP:20260617T132336Z
CREATED:20260617
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SUMMARY:Long-Term Geotechnical Liabilities Caused by Elevated Groundwater Levels After Construction
DESCRIPTION:Geotechnical reports by all engineers always include groundwater conditions existing at the time of the site and investigation. The reports also indicate the probability of groundwater fluctuation at the time of construction. However, most reports don’t identify the risk of serious structural issues that can develop after construction due to sustained elevated groundwater levels over the serviceable life of the structure (which is typically over 50 years).\nIn areas located within Dallas County and Rockwall County and elsewhere, many sites are underlined by the Eagle Ford Shale Formation and the Taylor Marl Ozan Formation. Deep highly active clay soils and weathered shale strata are present within these areas that are highly expansive and highly corrosive to buried concrete due to high soluble sulfate levels. An elevated groundwater condition over the life of facilities at these unstable sites will eventually cause excessive deep-seated soil swelling below foundations, floor slabs and flat work. Conditions that are often overlooked are related to elevated groundwater levels within soil layers that contain high soluble sulfates. These conditions can cause excessive corrosion of concrete within drilled shafts when the soluble sulfates within the soil are exposed to groundwater. Then after the steel reinforcement within the drilled shafts is exposed to the high plasticity clay due to excessive concrete corrosion, the steel reinforcement will also corrode. When these conditions occur, serious structural issues will obviously become problematic to owners and will cause serious long-term safety issues. This paper address several conditions that can cause elevated groundwater levels.\n
URL:https://texascecon.org/cecon/long-term-geotechnical-liabilities-caused-by-elevated-groundwater-levels-after-construction/
CATEGORIES:Geotechnical Institute (TxGI),Sessions
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