Cone penetration index for soil behaviour type prediction
Abstract Several approaches have been proposed to classify soil types using both cone and piezocone penetration tests. The chart relating the normalized cone resistance (Q tn ) and the friction ratio (F r ) has proven to be the most reliable method. However, its practical use requires function fitti...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2022-07-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-022-15994-x |
| _version_ | 1828259900389588992 |
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| author | Denilson José Ribeiro Sodré |
| author_facet | Denilson José Ribeiro Sodré |
| author_sort | Denilson José Ribeiro Sodré |
| collection | DOAJ |
| description | Abstract Several approaches have been proposed to classify soil types using both cone and piezocone penetration tests. The chart relating the normalized cone resistance (Q tn ) and the friction ratio (F r ) has proven to be the most reliable method. However, its practical use requires function fitting, where the chart is described by means of a soil behaviour type index. The currently available indexes for this chart, based on concentric circles and hyperbolas, lead to significant errors. Thus, to properly represent the Q tn –F r chart, this study proposes new soil behaviour type indexes based on an analytical approach from a concentric logarithmic spiral approximation and a numerical approach from an exponential function approximation. The new indexes provide an improvement in the reproduction of the soil type zones while preserving the robustness of the original method. A discussion on the cone penetration test-based soil type classification is presented, along with a case example comparing the soil behaviour indexes in soil profiling. |
| first_indexed | 2024-04-13T03:15:47Z |
| format | Article |
| id | doaj.art-de3ae09ea4c34d169982f6fee7cadcd3 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-04-13T03:15:47Z |
| publishDate | 2022-07-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-de3ae09ea4c34d169982f6fee7cadcd32022-12-22T03:04:55ZengNature PortfolioScientific Reports2045-23222022-07-0112111510.1038/s41598-022-15994-xCone penetration index for soil behaviour type predictionDenilson José Ribeiro Sodré0Faculty of Civil Engineering, Federal University of Pará, UFPAAbstract Several approaches have been proposed to classify soil types using both cone and piezocone penetration tests. The chart relating the normalized cone resistance (Q tn ) and the friction ratio (F r ) has proven to be the most reliable method. However, its practical use requires function fitting, where the chart is described by means of a soil behaviour type index. The currently available indexes for this chart, based on concentric circles and hyperbolas, lead to significant errors. Thus, to properly represent the Q tn –F r chart, this study proposes new soil behaviour type indexes based on an analytical approach from a concentric logarithmic spiral approximation and a numerical approach from an exponential function approximation. The new indexes provide an improvement in the reproduction of the soil type zones while preserving the robustness of the original method. A discussion on the cone penetration test-based soil type classification is presented, along with a case example comparing the soil behaviour indexes in soil profiling.https://doi.org/10.1038/s41598-022-15994-x |
| spellingShingle | Denilson José Ribeiro Sodré Cone penetration index for soil behaviour type prediction Scientific Reports |
| title | Cone penetration index for soil behaviour type prediction |
| title_full | Cone penetration index for soil behaviour type prediction |
| title_fullStr | Cone penetration index for soil behaviour type prediction |
| title_full_unstemmed | Cone penetration index for soil behaviour type prediction |
| title_short | Cone penetration index for soil behaviour type prediction |
| title_sort | cone penetration index for soil behaviour type prediction |
| url | https://doi.org/10.1038/s41598-022-15994-x |
| work_keys_str_mv | AT denilsonjoseribeirosodre conepenetrationindexforsoilbehaviourtypeprediction |