ALLUVIAL DEPOSITS AS A SUBSOIL AND MATERIAL FOR BASIC HYDRO-TECHNICAL CONSTRUCTIONS
The article presents an analysis of geotechnical parameters of the alluvial deposit (the areas of the Vistula and Warta river valleys) with a view to using the soil as an earth construction material and as a foundation for buildings constructed on the grounds tested. Strength and deformation paramet...
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| Format: | Article |
| Language: | English |
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Polish Society of Ecological Engineering (PTIE)
2015-11-01
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| Series: | Journal of Ecological Engineering |
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| Online Access: | http://www.journalssystem.com/jeeng/ALLUVIAL-DEPOSITS-AS-A-SUBSOIL-AND-MATERIAL-FOR-BASIC-HYDRO-TECHNICAL-CONSTRUCTIONS,60475,0,2.html |
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| author | Jędrzej Wierzbicki Katarzyna Stefaniak |
| author_facet | Jędrzej Wierzbicki Katarzyna Stefaniak |
| author_sort | Jędrzej Wierzbicki |
| collection | DOAJ |
| description | The article presents an analysis of geotechnical parameters of the alluvial deposit (the areas of the Vistula and Warta river valleys) with a view to using the soil as an earth construction material and as a foundation for buildings constructed on the grounds tested. Strength and deformation parameters of the subsoil tested were identified by the CPTU (cone penetration test) and DMT (flat dilatometer test) methods, as well as by the vane test (VT). The article includes the analysis of overconsolidation process of the soil tested and a formula for the identification of the overconsolidation ratio OCR. Equation 4 reflects the relation between the undrained shear strength and plasticity of the silts analyzed and the OCR value. The analysis resulted in the determination of the N<sub>kt</sub> coefficient, which might be used to identify the undrained shear strength of both sediments tested. On the basis of a detailed analysis of changes in terms of the constrained oedometric modulus M<sub>0</sub>, the relations between the said modulus, the liquidity index and the OCR value were identified. Mayne’s formula (1995) was used to determine the M<sub>0</sub> modulus from the CPTU test. The usefulness of the alluvial deposit as an earth construction material was analysed after their structure had been destroyed and compacted with a Proctor apparatus. In cases of samples characterized by different water content and soil particle density, the analysis of changes in terms of cohesion and the internal friction angle proved that these parameters are influenced by the soil phase composition. On the basis of the tests, it was concluded that the most desirable shear strength parameters are achieved when the silt is compacted below the optimum water content. |
| first_indexed | 2024-04-12T19:28:49Z |
| format | Article |
| id | doaj.art-af21892a88c441b3b0b7241788a6a07f |
| institution | Directory Open Access Journal |
| issn | 2299-8993 |
| language | English |
| last_indexed | 2024-04-12T19:28:49Z |
| publishDate | 2015-11-01 |
| publisher | Polish Society of Ecological Engineering (PTIE) |
| record_format | Article |
| series | Journal of Ecological Engineering |
| spelling | doaj.art-af21892a88c441b3b0b7241788a6a07f2022-12-22T03:19:25ZengPolish Society of Ecological Engineering (PTIE)Journal of Ecological Engineering2299-89932015-11-0116517618210.12911/22998993/6047560475ALLUVIAL DEPOSITS AS A SUBSOIL AND MATERIAL FOR BASIC HYDRO-TECHNICAL CONSTRUCTIONSJędrzej Wierzbicki0Katarzyna Stefaniak1Department of Engineering Geology and Geotechnics, Adam Mickiewicz University in Poznań, Maków Polnych Str. 16, 61-606 Poznań, PolandInstitute of Construction and Geoengineering, Poznań University of Life Sciences, Piątkowska Str. 94, 60-649 Poznań, PolandThe article presents an analysis of geotechnical parameters of the alluvial deposit (the areas of the Vistula and Warta river valleys) with a view to using the soil as an earth construction material and as a foundation for buildings constructed on the grounds tested. Strength and deformation parameters of the subsoil tested were identified by the CPTU (cone penetration test) and DMT (flat dilatometer test) methods, as well as by the vane test (VT). The article includes the analysis of overconsolidation process of the soil tested and a formula for the identification of the overconsolidation ratio OCR. Equation 4 reflects the relation between the undrained shear strength and plasticity of the silts analyzed and the OCR value. The analysis resulted in the determination of the N<sub>kt</sub> coefficient, which might be used to identify the undrained shear strength of both sediments tested. On the basis of a detailed analysis of changes in terms of the constrained oedometric modulus M<sub>0</sub>, the relations between the said modulus, the liquidity index and the OCR value were identified. Mayne’s formula (1995) was used to determine the M<sub>0</sub> modulus from the CPTU test. The usefulness of the alluvial deposit as an earth construction material was analysed after their structure had been destroyed and compacted with a Proctor apparatus. In cases of samples characterized by different water content and soil particle density, the analysis of changes in terms of cohesion and the internal friction angle proved that these parameters are influenced by the soil phase composition. On the basis of the tests, it was concluded that the most desirable shear strength parameters are achieved when the silt is compacted below the optimum water content.http://www.journalssystem.com/jeeng/ALLUVIAL-DEPOSITS-AS-A-SUBSOIL-AND-MATERIAL-FOR-BASIC-HYDRO-TECHNICAL-CONSTRUCTIONS,60475,0,2.htmlsilty soilsstrengthdeformationoverconsolidation |
| spellingShingle | Jędrzej Wierzbicki Katarzyna Stefaniak ALLUVIAL DEPOSITS AS A SUBSOIL AND MATERIAL FOR BASIC HYDRO-TECHNICAL CONSTRUCTIONS Journal of Ecological Engineering silty soils strength deformation overconsolidation |
| title | ALLUVIAL DEPOSITS AS A SUBSOIL AND MATERIAL FOR BASIC HYDRO-TECHNICAL CONSTRUCTIONS |
| title_full | ALLUVIAL DEPOSITS AS A SUBSOIL AND MATERIAL FOR BASIC HYDRO-TECHNICAL CONSTRUCTIONS |
| title_fullStr | ALLUVIAL DEPOSITS AS A SUBSOIL AND MATERIAL FOR BASIC HYDRO-TECHNICAL CONSTRUCTIONS |
| title_full_unstemmed | ALLUVIAL DEPOSITS AS A SUBSOIL AND MATERIAL FOR BASIC HYDRO-TECHNICAL CONSTRUCTIONS |
| title_short | ALLUVIAL DEPOSITS AS A SUBSOIL AND MATERIAL FOR BASIC HYDRO-TECHNICAL CONSTRUCTIONS |
| title_sort | alluvial deposits as a subsoil and material for basic hydro technical constructions |
| topic | silty soils strength deformation overconsolidation |
| url | http://www.journalssystem.com/jeeng/ALLUVIAL-DEPOSITS-AS-A-SUBSOIL-AND-MATERIAL-FOR-BASIC-HYDRO-TECHNICAL-CONSTRUCTIONS,60475,0,2.html |
| work_keys_str_mv | AT jedrzejwierzbicki alluvialdepositsasasubsoilandmaterialforbasichydrotechnicalconstructions AT katarzynastefaniak alluvialdepositsasasubsoilandmaterialforbasichydrotechnicalconstructions |