A study of the relationship between the pressuremeter modulus and the preconsolidation pressure around a thrust fault
| Autor: | Ali Özvan, Muge K. Akin, İsmail Akkaya, Elif Erdeve Özvan, Mutluhan Akin |
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| Přispěvatelé: | Çukurova Üniversitesi |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Coefficient of determination
0208 environmental biotechnology Borehole Soil Science Modulus Preconsolidation pressure 02 engineering and technology 010501 environmental sciences Fault (geology) 01 natural sciences Pressuremeter test Environmental Chemistry Thrust fault Geotechnical engineering Compression (geology) Clay soil 0105 earth and related environmental sciences Earth-Surface Processes Water Science and Technology Global and Planetary Change geography geography.geographical_feature_category Geology Pollution 020801 environmental engineering Menard deformation modulus |
| Popis: | The study area is in a zone under the influence of the Lake Van water changes and the Van fault, which caused a destructive earthquake in 2011. Due to the level changes of Lake Van, sediments with different thicknesses as well as grain sizes were deposited in this region and the characteristics of these sediments were significantly affected by the morphology and lake water fluctuations in the past. A total of six boreholes were drilled along a 3-km line within the study area to determine the preconsolidation pressure (?pc) and the pressuremeter test values of the clayey levels of old lake deposits—which are known to have different physical and mechanical properties—with hopes to gain an insight on how they influence the mechanical tests performed in the field and in laboratory conditions. The relationship between these values was also statistically evaluated. When both datasets were evaluated together, it was determined that the stresses in the area close to the Van Thrust Fault plane caused deformations in the soil, which in turn affected the hanging-wall block of the thrust fault in particular. The inspection of EM and ?pc values for the area within the primary compression zone of the Van Fault revealed that both values of the boreholes on the footwall block were higher compared to other boreholes close to the lake (southwest). This finding indicates that the fault stresses at the footwall block of the fault plane enhance the mechanical characteristics of the soil. The data obtained were also evaluated using regression analysis. Relationships between all available data were investigated and a high coefficient of determination was derived between the Menard deformation modulus (EM) and the preconsolidation (?pc) pressure. © 2019, Springer-Verlag GmbH Germany, part of Springer Nature. 2017-FBA-6347 The Scientific Research Projects Office of Van Yüzüncü Yıl University (YYU-BAP, Project Number 2017-FBA-6347) financially supported this study. Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations. |
| Databáze: | OpenAIRE |
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