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A preliminary sinkhole raveling chart
Abstract Sinkholes are a major geohazard in karst areas where soluble carbonate bedrock exists. Downward seepage resulting from the groundwater recharge continuously erode cover soils into cavities within the underlying bedrock, resulting in raveling of cover soils. Identifying these raveled soils (or zones) is critial in preventing and mitigating the sinkhole collapse. In this study, a proof-of-concept was performed to demonstrate the concept of a sinkhole raveling chart that can quantify the severity levels of raveling. The raveling chart is constructed based on Cone Penetration Test (CPT) data collected through multiple sinkhole active sites in Central Florida. A preliminary analysis (e.g. data preparation, grouping, and zoning) was carried out to construct the prototype sinkhole raveling chart. This prototype raveling chart, as a function of tip resistance (qc) and sleeve friction (f s), could delineate not only the raveled and non-raveled zones but also the areas that correspond to different levels of raveling severity.
Highlights Quantify the level of sinkhole raveling using in-situ testing Correlate the Cone Penetration Test (CPT) data to sinkhole raveling The first-generation sinkhole raveling chart that quantitatively measures the severity of sinkhole raveling.
A preliminary sinkhole raveling chart
Abstract Sinkholes are a major geohazard in karst areas where soluble carbonate bedrock exists. Downward seepage resulting from the groundwater recharge continuously erode cover soils into cavities within the underlying bedrock, resulting in raveling of cover soils. Identifying these raveled soils (or zones) is critial in preventing and mitigating the sinkhole collapse. In this study, a proof-of-concept was performed to demonstrate the concept of a sinkhole raveling chart that can quantify the severity levels of raveling. The raveling chart is constructed based on Cone Penetration Test (CPT) data collected through multiple sinkhole active sites in Central Florida. A preliminary analysis (e.g. data preparation, grouping, and zoning) was carried out to construct the prototype sinkhole raveling chart. This prototype raveling chart, as a function of tip resistance (qc) and sleeve friction (f s), could delineate not only the raveled and non-raveled zones but also the areas that correspond to different levels of raveling severity.
Highlights Quantify the level of sinkhole raveling using in-situ testing Correlate the Cone Penetration Test (CPT) data to sinkhole raveling The first-generation sinkhole raveling chart that quantitatively measures the severity of sinkhole raveling.
A preliminary sinkhole raveling chart
Nam, Boo Hyun (author) / Shamet, Ryan (author)
Engineering Geology ; 268
2020-01-31
Article (Journal)
Electronic Resource
English
Probabilistic Field Assessment of Sinkhole Occurrence Using the Raveling Index
| British Library Conference Proceedings | 2020
| British Library Conference Proceedings | 2019