Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Sinkhole Stability Charts in Central Florida Soils
Groundwater flow in karst terrain (fissured soluble bedrock) often creates underground cavities due to a continuous internal soil erosion. Consequently, raveling of soil occurs and those subsurface cavities grow and reach to the surface, resulting in a sudden collapse. In this study, finite element (FE) numerical simulations were performed to construct sinkhole stability charts that can be practically used by engineers. Two sinkhole sites in central Florida were selected for the analysis, and cone penetration test (CPT) soundings were conducted for characterizing site subsurface condition. The CPT data were used to determine input modeling parameters in the FE simulations. Hardening soil model (HSM) was adopted as constitutive model and the constitutive soil parameters were determined based on published correlations. The shear strength reduction (SSR) method was employed to compute the factor of safety as the size of underground cavity increases. A series of scenario-based simulations were carried out to construct the stability charts. These charts are aimed at helping engineers as an initial check in quantifying the vulneratiblity of sinkhole in the form of factor of safety for a given subsurface condition, which can be obtainable from CPT tests.
Sinkhole Stability Charts in Central Florida Soils
Groundwater flow in karst terrain (fissured soluble bedrock) often creates underground cavities due to a continuous internal soil erosion. Consequently, raveling of soil occurs and those subsurface cavities grow and reach to the surface, resulting in a sudden collapse. In this study, finite element (FE) numerical simulations were performed to construct sinkhole stability charts that can be practically used by engineers. Two sinkhole sites in central Florida were selected for the analysis, and cone penetration test (CPT) soundings were conducted for characterizing site subsurface condition. The CPT data were used to determine input modeling parameters in the FE simulations. Hardening soil model (HSM) was adopted as constitutive model and the constitutive soil parameters were determined based on published correlations. The shear strength reduction (SSR) method was employed to compute the factor of safety as the size of underground cavity increases. A series of scenario-based simulations were carried out to construct the stability charts. These charts are aimed at helping engineers as an initial check in quantifying the vulneratiblity of sinkhole in the form of factor of safety for a given subsurface condition, which can be obtainable from CPT tests.
Sinkhole Stability Charts in Central Florida Soils
Soliman, Moataz (Autor:in) / Arboleda-Monsalve, Luis G. (Autor:in) / Horhota, David (Autor:in) / Nam, Boo Hyun (Autor:in)
Eighth International Conference on Case Histories in Geotechnical Engineering ; 2019 ; Philadelphia, Pennsylvania
Geo-Congress 2019 ; 248-257
21.03.2019
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
Sinkhole Stability Charts in Central Florida Soils
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Sinkhole Stability Charts in Central Florida Soils
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