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A platform for research: civil engineering, architecture and urbanism
Investigation and Remediation of a Phosphate Plant Sinkhole in Florida
During routine inspection, staff at a Florida phosphate plant discovered a large sinkhole in a phosphogypsum stack. The owner solicited the services of geotechnical consultant Ardaman & Associates, Inc., to oversee the investigation and remediation. The sinkhole feature was subsequently determined to measure approximately 41 m (135 ft) at its widest point and extend to a total depth of approximately 91 m (300 ft). The occurrence of a sinkhole meant that the underlying confining layer had been breached, permitting low pH water from the stack to flow into the underlying aquifer. The engineering team responded rapidly to alleviate environmental concerns and determined that any groundwater impacts were effectively contained on site via recovery wells, and then implemented a grouting program to remediate the sinkhole and ensure the integrity of the confining layer between the surficial aquifer and the Floridan aquifer. Piezometric water levels confirmed successful remediation of the sinkhole and re-establishment of the confining layer. This paper details the geotechnical investigation and design and implementation of the grouting program, which featured the innovative use of specialized techniques, including sonic drilling, to address technical concerns.
Investigation and Remediation of a Phosphate Plant Sinkhole in Florida
During routine inspection, staff at a Florida phosphate plant discovered a large sinkhole in a phosphogypsum stack. The owner solicited the services of geotechnical consultant Ardaman & Associates, Inc., to oversee the investigation and remediation. The sinkhole feature was subsequently determined to measure approximately 41 m (135 ft) at its widest point and extend to a total depth of approximately 91 m (300 ft). The occurrence of a sinkhole meant that the underlying confining layer had been breached, permitting low pH water from the stack to flow into the underlying aquifer. The engineering team responded rapidly to alleviate environmental concerns and determined that any groundwater impacts were effectively contained on site via recovery wells, and then implemented a grouting program to remediate the sinkhole and ensure the integrity of the confining layer between the surficial aquifer and the Floridan aquifer. Piezometric water levels confirmed successful remediation of the sinkhole and re-establishment of the confining layer. This paper details the geotechnical investigation and design and implementation of the grouting program, which featured the innovative use of specialized techniques, including sonic drilling, to address technical concerns.
Investigation and Remediation of a Phosphate Plant Sinkhole in Florida
Garlanger, John E. (author) / Schmall, Paul C. (author)
Proceedings of the Fourth International Conference on Grouting and Deep Mixing ; 2012 ; New Orleans, Louisiana, United States
Grouting and Deep Mixing 2012 ; 972-982
2012-08-17
Conference paper
Electronic Resource
English
Grouting , Highways and roads , Chemical grouting , Florida , Anchors , Cement , Drilling , Cutoffs , Sinkholes , Piles , Mixing , Industrial facilities , Foundations , Hydraulic structures
Investigation and Remediation of a Phosphate Plant Sinkhole in Florida
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