Evaluation of the Undrained Shear Strength in Preconsolidated Cohesive Soils Based on the Seismic Dilatometer Test
The undrained shear strength in cohesive soils can be evaluated based on measurements obtained from the standard dilatometer test (DMT) using single- and multi-factor empirical relationships. However, the empirical relationships presented in the literature may sometimes show relatively high values o...
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MDPI AG
2019-04-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/9/8/1660 |
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| author | Paweł Galas Zbigniew Lechowicz Maria Jolanta Sulewska |
| author_facet | Paweł Galas Zbigniew Lechowicz Maria Jolanta Sulewska |
| author_sort | Paweł Galas |
| collection | DOAJ |
| description | The undrained shear strength in cohesive soils can be evaluated based on measurements obtained from the standard dilatometer test (DMT) using single- and multi-factor empirical relationships. However, the empirical relationships presented in the literature may sometimes show relatively high values of the maximum relative error. The add-on seismic module to the seismic dilatometer test (SDMT) extends parameters measurable in a standard dilatometer test by the shear wave velocity <i>V<sub>s</sub></i> as an independent variable. Therefore, a method for evaluating the undrained shear strength in cohesive soils based on data obtained from the seismic dilatometer test is presented in this study. In the method proposed, the two-factor empirical relationship for evaluating the normalized undrained shear strength <i>τ<sub>fu</sub>/σ’<sub>v</sub></i> is used based on independent variables: The normalized difference between the corrected second pressure reading and the corrected first pressure reading (<i>p</i><sub>1</sub> − <i>p<sub>o</sub></i>)/<i>σ</i>’<i><sub>v</sub></i> and the normalized shear wave velocity <i>V<sub>s</sub></i>/100. The proposed two-factor empirical relationship provides a more reliable evaluation of the undrained shear strength in the tested Pleistocene and Pliocene clays in comparison to the empirical relationships presented in the literature, with a maximum relative error max <i>RE</i> at about ±20% and the mean relative error <i>RE</i> at about 8%. |
| first_indexed | 2024-12-21T23:59:09Z |
| format | Article |
| id | doaj.art-a62cbeb6561641608b25290cfd7de089 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-12-21T23:59:09Z |
| publishDate | 2019-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-a62cbeb6561641608b25290cfd7de0892022-12-21T18:45:44ZengMDPI AGApplied Sciences2076-34172019-04-0198166010.3390/app9081660app9081660Evaluation of the Undrained Shear Strength in Preconsolidated Cohesive Soils Based on the Seismic Dilatometer TestPaweł Galas0Zbigniew Lechowicz1Maria Jolanta Sulewska2Faculty of Civil and Environmental Engineering, Warsaw University of Life Sciences–SGGW, Nowoursynowska 159 St., 02-776 Warsaw, PolandFaculty of Civil and Environmental Engineering, Warsaw University of Life Sciences–SGGW, Nowoursynowska 159 St., 02-776 Warsaw, PolandFaculty of Civil and Environmental Engineering, Bialystok University of Technology, Wiejska 45E St., 15-351 Bialystok, PolandThe undrained shear strength in cohesive soils can be evaluated based on measurements obtained from the standard dilatometer test (DMT) using single- and multi-factor empirical relationships. However, the empirical relationships presented in the literature may sometimes show relatively high values of the maximum relative error. The add-on seismic module to the seismic dilatometer test (SDMT) extends parameters measurable in a standard dilatometer test by the shear wave velocity <i>V<sub>s</sub></i> as an independent variable. Therefore, a method for evaluating the undrained shear strength in cohesive soils based on data obtained from the seismic dilatometer test is presented in this study. In the method proposed, the two-factor empirical relationship for evaluating the normalized undrained shear strength <i>τ<sub>fu</sub>/σ’<sub>v</sub></i> is used based on independent variables: The normalized difference between the corrected second pressure reading and the corrected first pressure reading (<i>p</i><sub>1</sub> − <i>p<sub>o</sub></i>)/<i>σ</i>’<i><sub>v</sub></i> and the normalized shear wave velocity <i>V<sub>s</sub></i>/100. The proposed two-factor empirical relationship provides a more reliable evaluation of the undrained shear strength in the tested Pleistocene and Pliocene clays in comparison to the empirical relationships presented in the literature, with a maximum relative error max <i>RE</i> at about ±20% and the mean relative error <i>RE</i> at about 8%.https://www.mdpi.com/2076-3417/9/8/1660cohesive soilsundrained shear strengthseismic dilatometer teststatistical analysis |
| spellingShingle | Paweł Galas Zbigniew Lechowicz Maria Jolanta Sulewska Evaluation of the Undrained Shear Strength in Preconsolidated Cohesive Soils Based on the Seismic Dilatometer Test Applied Sciences cohesive soils undrained shear strength seismic dilatometer test statistical analysis |
| title | Evaluation of the Undrained Shear Strength in Preconsolidated Cohesive Soils Based on the Seismic Dilatometer Test |
| title_full | Evaluation of the Undrained Shear Strength in Preconsolidated Cohesive Soils Based on the Seismic Dilatometer Test |
| title_fullStr | Evaluation of the Undrained Shear Strength in Preconsolidated Cohesive Soils Based on the Seismic Dilatometer Test |
| title_full_unstemmed | Evaluation of the Undrained Shear Strength in Preconsolidated Cohesive Soils Based on the Seismic Dilatometer Test |
| title_short | Evaluation of the Undrained Shear Strength in Preconsolidated Cohesive Soils Based on the Seismic Dilatometer Test |
| title_sort | evaluation of the undrained shear strength in preconsolidated cohesive soils based on the seismic dilatometer test |
| topic | cohesive soils undrained shear strength seismic dilatometer test statistical analysis |
| url | https://www.mdpi.com/2076-3417/9/8/1660 |
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